MUCAR CS4 User manual

MUCAR CS4

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Safety Precautions and Warnings
To avoid personal injury, property loss, or accidental damage to the product, read all of the
information in this section before using the product.
Handle equipment carefully
Do not drop, bend, or puncture the tool, or insert extra objects into or place heavy objects
on the device. The vulnerable components inside may be damaged.
Do not disassemble or modify the equipment
The device is a sealed device with no user-serviceable parts inside. All internal repairs
must be performed by an authorized maintenance organization or qualied technician.
Attempts to disassemble or modify the device will void the warranty.
Do not try to replace the internal battery
The internal rechargeable lithium battery must be replaced by an authorized maintenance
organization or qualied technician. Contact the dealer for factory replacement.
Adapter information
Avoid immersing the device in water or placing it in a location where it may absorb moisture or
other liquids.
During normal use, the charging device may become hot. Please ensure that there is good
ventilation while charging device.
If any of the following situation occurs, please unplug the charging device:
• The charging device is exposed to rain, liquid or in an environment with excessive
overlap.
• The charging device showed physical damage.
• The charging device is under cleaning.
Data and Software Protection
Do not delete unknown les or change the names of les or directories created by others,
otherwise the device software may not run.
！Note: Access to network resources makes the device vulnerable to computer viruses, hackers,
spyware, and other malicious behaviors, and may damage the device, software, or data. To make
ensure that you are using firewalls, anti-virus software and anti-spyware software to provide
adequate protection for your computer and keep these software up to date.
Precautions on Using this tool
• Make sure the ignition switch should be in the OFF position when plugging and
unplugging the diagnostic connector.

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IC WARNING
Cet équipement est conforme aux limites d’exposition aux rayonnements ISED établies
pour un environnement non contrôlé. L’utilisateur nal doit suivre les instructions
spéciques pour satisfaire les normes. Cet émetteur ne doit pas être co-implanté ou
fonctionner en conjonction avec toute autre antenne ou transmetteur.
Le dispositif portatif est conçu pour répondre aux exigences d’exposition aux ondes radio
établie par ledéveloppement énergétique DURABLE. Ces exigences un SAR limite de
1,6 W/kg en moyenne pour un gramme de tissu. La valeur SAR la 0.733W/kg plus élevée
signalée en vertu de cette norme lors de la certication de produit à utiliser lorsqu’il est
correctement porté sur le corps.
FCC Requirement
Changes or modications not expressly approved by the party responsible for compliance
could void the user’ s authority to operate the equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following
two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that may
cause undesired operation.
Note: This equipment has been tested and found to comply with the limits for a Class
B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference in a residential installation.
This equipment generates, uses, and can radiate radio frequency energy, and if not
installed and used in accordance with the instructions, may cause harmful interference
to radio communications. However, there is no guarantee that interference will not occur
in a particular installation. If this equipment does cause harmful interference to radio
or television reception, which can be determined by turning the equipment o󰀨 and on,
the user is encouraged to try to correct the interference by one or more of the following
measures:
– Reorient or relocate the receiving antenna.
– Increase the separation between the equipment and receiver.
– Connect the equipment into an outlet on a circuit di󰀨erent from that to which the receiver
is connected.
– Consult the dealer or an experienced radio/TV technician for help.
FCC WARNING
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled
environment. End user must follow the specic operating instructions for satisfying RF
exposure compliance. This transmitter must not be co-located or operating in conjunction
with any other antenna or transmitter.
• Keep the connector in the storage box on the back of the main unit, when the vehicle
diagnosis is nished.
• Gently press the diagnostic connector to pop up the diagnostic connector. Do not pull or
use sharp objects to pry the diagnostic connector.
Precautions on Operating Vehicle’s ECU
• Do not disconnect battery or any wiring cables in the vehicle when the ignition switch is
on, as this could avoid damage to the sensors or the ECU.
• Do not place any magnetic objects near the ECU. Disconnect the power supply to the
ECU before performing any welding operations on the vehicle.
• Be extremely careful when performing any operations near the ECU or sensors. Ground
yourself when you disassemble PROM, otherwise ECU and sensors can be damaged
by static electricity.
• When reconnecting the ECU harness connector, make sure it is attached rmly,
otherwise electronic elements, such as ICs inside the ECU, can be damaged.
IC Requirement
This device contains licence-exempt transmitter(s)/receiver(s) that comply with
Innovation,Science and Economic Development Canada’ s licence-exempt RSS(s).
Operation is subject to the following two conditions:
(1)This device may not cause interference.
(2)This device must accept any interference,including interference that may cause
undesired operation of the device.
L'émetteur/récepteur exempt de licence contenu dans le présent appareil est conforme
aux CNR d'Innovation,Sciences et Développement économique Canada applicables
aux appareils radio exempts de licence. L 'exploitation est autorisée aux deux conditions
suivantes :
1)L'appareil ne doit pas produire de brouillage;
2)L'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est
susceptible d'en compromettre le fonctionnement.

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Content
1 Quick Start Manual..........................................................................................1
1.1 Initial Use........................................................................................................................1
1.1.1 Turn on the Machine..............................................................................................1
1.1.2 Language Setting...................................................................................................1
1.1.3 Connect Wi-Fi........................................................................................................2
1.1.4 Choose Time Zone ................................................................................................2
1.1.5 User Agreement.....................................................................................................3
1.1.6 Create an Account .................................................................................................3
1.1.7 Typing in Business Information..............................................................................4
2 General information ........................................................................................4
2.1 On-Board Diagnostics (OBD) II ......................................................................................4
2.2 Diagnostic Trouble Codes (DTCs)..................................................................................4
2.3 Data Link Connector (DLC) Location..............................................................................6
2.4 OBDII Readiness Monitors.............................................................................................6
2.5 OBDII Monitor Readiness Status....................................................................................7
2.6 OBDII Denitions............................................................................................................7
3 Introduction to the Product ............................................................................9
3.1 General introductions .....................................................................................................9
3.1.1 Diagnostic host ......................................................................................................9
3.1.2 Technical indications............................................................................................10
4 Preparation.....................................................................................................11
4.1 Charge the host............................................................................................................11
4.2 Battery ..........................................................................................................................11
4.3 Power on and o󰀨 ..........................................................................................................11
4.3.1 Power on..............................................................................................................11
4.3.2 Power o󰀨..............................................................................................................11
5 Function Descriptions...................................................................................12
5.1 Diagnosis......................................................................................................................12
5.2 Maintenance & Reset ...................................................................................................20
5.2.1 Maintenance Light Reset(OIL).............................................................................20
5.2.2 Steering Angle Reset(SAS) .................................................................................21
5.2.3 Brake Pad Reset(EPB)........................................................................................21
5.2.4 Tire Pressure Reset(TPMS).................................................................................21
5.2.5 Throttle Matching(ETS)........................................................................................21
5.3 File................................................................................................................................21
5.4 Repair Info....................................................................................................................22
5.5 Software update ...........................................................................................................22
5.6 Settings.........................................................................................................................23
The mobile device is designed to meet the requirements for exposure to radio waves
established by the Federal Communications Commission (USA). These requirements set a
SAR limit of 1.6 W/kg averaged over one gram of tissue. The highest SAR value reported
under this standard during product certication for use when properly worn on the body is
0.733 W/kg.
For body operation, this device has been tested and meets FCC RF exposure guidelines
when used with any accessory that contains no metal and that positions a minimum of
15mm from the body. Use of other accessories may not ensure compliance with FCC RF
exposure guidelines.

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1 Quick Start Manual
1.1 Initial Use
The following settings should be made when you initially use the tool.
1.1.1 Turn on the Machine
After pressing the power button, images will be shown on the screen as follows.
1.1.2 Language Setting
Select the tool language from the languages displayed on the interface.
5.6.1 Costomer management .......................................................................................23
5.6.2 Network................................................................................................................23
5.6.3 Firmware upgrade................................................................................................23
6 Q&A.................................................................................................................23
7 Warranty Terms..............................................................................................24

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1.1.5 User Agreement
Please read all the terms and conditions of the user agreement carefully. Choose “Agree
all the above terms”, and click the “Agree” button to complete the registration process.
Then the page will jump to the “Congratulations on your successful registration” interface.
Initial settings are nished after the above steps. It will automatically jump to the work
interface after 3 seconds.
1.1.6 Create an Account
You need to register an account through your e-mail box. If you have owned other products
of MUCAR series, you can directly log in by using the account available.
1.1.3 Connect Wi-Fi
The system will automatically search all available Wi-Fi networks and you can choose the
Wi-Fi needed. If the chosen network is open, you can connect it directly; If the chosen
network is encrypted, you must enter the correct password. Then You can connect Wi-Fi
after clicking “connect”.
Tips: Wi-Fi must be set. If no Wi-Fi network is available nearby, you can enable "Portable Mobile Hotspot".
1.1.4 Choose Time Zone
Choose the time zone of the current location, then the system will automatically cogure
the time according to the time zone you choose.

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might be occurring within a vehicle. OBDII Diagnostic Trouble Codes consist of a  vedigit
alphanumeric code. The rst character, a letter, identi es which control system sets the
code. The second character, a number, 0-3; other three characters, a hex character, 0-9
or A-F provide additional information on where the DTC originated and the operating
conditions that caused it to set. Here below is an example to illustrate the structure of the
digits:
DTC Example
P0201
Systems
P=Powertrai
B=Body
C=Chassis
U=Network
ldentifies what section of the
system is malfunctioning
Code Type
0 - Generic(SAE)
1 - Manufacturer Specic
2 - Generic ('P”Codes) and
Manufacturer
Specic ("B”,“C”and
“U”Codes)
3 - Includes both Generic
and Manufacturer
Specic Codes
Sub-systems
Identifies the system where the
problem is located.“P”Code systems
are listed below.“B”,“C”and“U”Code
system will vary.
0 - Fuel and air metering; Auxiliary
emlssion controls
1 - Fuel and air metering
2 - Fuel and air metering (injector
circuit malfunction only)
3 - Ignition system or misre
4 - Auxiliary emission control system
5 - Vehicle speed control and idl
control system
6 - Computer output circuits
7 - Transmission
8 - Transmission
9 - Transmission
A - Hybrid Propulsion
B - Hybrid Propulsion
C - Hybrid Propulsion
1.1.7 Typing in Business Information
Typing in the repair shop information, which will be shown in the diagnostic report.
2 General information
2.1 On-Board Diagnostics (OBD) II
The rst generation of On-Board Diagnostics (OBD I) was developed by the California
Air Resources Board (ARB) and implemented in 1996 to monitor some of the emission
control components on vehicles. As technology evolved and the desire to improve the
OnBoard Diagnostic system increased, a new generation of On-Board Diagnostic system
was developed. This second generation of OnBoard Diagnostic regulations is called “OBD
II”. The OBDII system is designed to monitor emission control systems and key engine
components by performing either continuous or periodic tests of speci c components
and vehicle conditions. When a problem is detected, the OBDII system turns on a warning
lamp (MIL) on the vehicle instrument panel to alert the driver typically by the phrase of
“Check Engine” or “Service Engine Soon”. The system will also store important information
about the detected malfunction so that a technician can accurately nd and x theproblem.
Here below follow three pieces of such valuable information:
1) Whether the Malfunction Indicator Light (MIL) is commanded ‘on’ or ‘o󰀨 ’;
2) Which, if any, Diagnostic Trouble Codes (DTCs) are stored;
3) Readiness Monitor status.
2.2 Diagnostic Trouble Codes (DTCs)
OBD II Diagnostic Trouble Codes are codes that are stored by the on-board computer
diagnostic system in response to a problem found in the vehicle. These codes identify a
particular problem area and is intended to provide you with a guide as to where a fault

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Once the vehicle is running, the OBDII system is continuously checking the above
components, monitoring key engine sensors, watching for engine misre, and monitoring
fuel demands.
Non-Continuous Monitors -- - Unlike the continuous monitors, many emissions and engine
system components require the vehicle to be operated under specic conditions before the
monitor is ready. These monitors are termed noncontinuous monitors and are listed below:
1) EGR System
2) O2 Sensors
3) Catalyst
4) Evaporative System
5) O2 Sensor Heater
6) Secondary air Injection
7) Heated Catalyst
8) A/C system
2.5 OBDII Monitor Readiness Status
OBDII systems must indicate whether or not the vehicle’s PCM’s monitor system has
completed testing on each component. Components that have been tested will be reported
as “Ready”, or “Complete”, meaning they have been tested by the OBDII system.
The purpose of recording readiness status is to allow inspectors to determine if the
vehicle’s OBDII system has tested all the components and/or systems. The Powertrain
Control Module (PCM) sets a monitor to “Ready” or “Complete” after an appropriate drive
cycle has been performed. The drive cycle that enables a monitor and sets readiness
codes to “Ready” varies for each individual monitor. Once a monitor is set as “Ready”
or “Complete”, it will remain in this state. A number of factors, including erasing of
Diagnostic Trouble Codes (DTCs) with a code reader or a disconnected battery, can result
in Readiness Monitors being set to “Not Ready”. Since the three continuous monitors
are constantly evaluating, they will be reported as “Ready” all of the time. If testing of a
particular supported non-continuous monitor has not been completed, the monitor status
will be reported as “Not Complete” or “Not Ready.”
In order for the OBD monitor system to become ready, the vehicle should be driven under
a variety of normal operating conditions. These operating conditions may include a mix of
highway driving and stop and go, city type driving, and at least one overnight-o󰀨 period.
For specic information on getting your vehicle’s OBD monitor system ready, please
consult your vehicle owner’s manual.
2.3 Data Link Connector (DLC) Location
The DLC (Data Link Connector or Diagnostic Link Connector) is typically a 16pin connector
where diagnostic code readers interface with the vehicle’s onboard computer. The DLC is
usually located 12 inches from the center of the instrument panel (dash), under or around
the driver’s side for most vehicles. If Data Link Connector is not located under dashboard,
a label should be there telling location. For some Asian and European vehicles, the DLC
is located behind the ashtray and the ashtray must be removed to access the connector. If
the DLC cannot be found, refer to the vehicle’s service manual for the location.
2.4 OBDII Readiness Monitors
An important part of a vehicle’s OBDII system is the Readiness Monitors, which are
indicators used to nd out if all of the emissions components have been evaluated by the
OBDII system. They are running periodic tests on specic systems and components to
ensure that they are performing within allowable limits.
Currently, there are eleven OBDII I Readiness Monitors (or I/M Monitors) dened by the
U.S. Environmental Protection Agency (EPA). Not all monitors are supported in every
vehicles and the exact number of monitors in any vehicle depends on the motor vehicle
manufacturer's emissions control strategy.
Continuous Monitors -- Some of the vehicle components or systems are continuously
tested by the vehicle's OBDII system, while others are tested only under specic vehicle
operating conditions. The continuously monitored components listed below are always
ready:
1. Misre
2. Fuel System
3. Comprehensive Components (CCM)

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gradual adjustments to the fuel calibration schedule than short-term trim adjustments.
These long-term adjustments compensate for vehicle di󰀨erences and gradual changes
that occur over time.
3 Introduction to the Product
3.1 General introductions
MUCAR CS4 is the OBD product for DIY users. Equipped with Android operating system,
it features powerful functions and can be updated online. Moreover, full communication
protocols make it cover a wider range of vehicle models.
21 3 4
2.6 OBDII Denitions
Powertrain Control Module (PCM) -- OBDII terminology for the on-board computer that
controls engine and drive train.
Malfunction Indicator Light (MIL) -- Malfunction Indicator Light (Service Engine Soon,
Check Engine) is a term used for the light on the instrument panel. It is to alert the driver
and/or the repair technician that there is a problem with one or more of vehicle’s systems
and may cause emissions to exceed federal standards. If the MIL illuminates with a steady
light, it indicates that a problem has been detected and the vehicle should be serviced
as soon as possible. Under certain conditions, the dashboard light will blink or ash. This
indicates a severe problem and ashing is intended to discourage vehicle operation. The
vehicle onboard diagnostic system cannot turn the MIL o󰀨 until the necessary repairs are
completed or the condition no longer exists.
DTC -- Diagnostic Trouble Codes (DTC) that identies which section of the emission
control system has malfunctioned.
Enabling Criteria -- Also termed Enabling Conditions. They are the vehiclespecic events
or conditions that must occur within the engine before the various monitors will set, or
run. Some monitors require the vehicle to follow a prescribed “drive cycle” routine as part
of the enabling criteria. Drive cycles vary among vehicles and for each monitor in any
particular vehicle. Please refer to the vehicle's factory service manual for specic enabling
procedures.
OBDII Drive Cycle -- A specic mode of vehicle operation that provides conditions
required to set all the readiness monitors applicable to the vehicle to the “ready” condition.
The purpose of completing an OBDII drive cycle is to force the vehicle to run its onboard
diagnostics. Some form of a drive cycle needs to be performed after DTCs have been
erased from the PCM’s memory or after the battery has been disconnected. Running
through a vehicle’s complete drive cycle will “set” the readiness monitors so that future
faults can be detected. Drive cycles vary depending on the vehicle and the monitor that
needs to be reset. For vehicle specic drive cycle, consult the service manual.
Freeze Frame Data -- When an emissions related fault occurs, the OBDII system not only
sets a code but also records a snapshot of the vehicle operating parameters to help in
identifying the problem. This set of values is referred to as Freeze Frame Data and may
include important engine parameters such as engine RPM, vehicle speed, air ow, engine
load, fuel pressure, fuel trim value, engine coolant temperature, ignition timing advance, or
closed loop status.
Fuel Trim (FT) -- Feedback adjustments to the base fuel schedule. Short-term fuel trim
refers to dynamic or instantaneous adjustments. Long-term fuel trim refers to much more

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4.1 Diagnosis
System diagnosis: it supports more than 100 automo brands, smart diagnosis and
traditional diagnosis covering OBD II diagnosis.
System :ABS+SRS+ECM+TCM
Reset:OIL+ EPB+SAS+TPMS+ETS
Tips:Insert the diagnostic cable into the vehicle interface, and then click "Scan" on the
main interface. Then, select the model. After the communication is established, the system
starts to read the VIN of the vehicle.Prompt: If the communication fails, a prompt message
box will pop up on the screen. Follow the prompts on the screen to continue.
If it fails to read VIN, you need to enter VIN manually.
3.1.1 Diagnostic host
1.Diagnostic Cable: Standard OBDII diagnostic cable
2. LCD Display: 5 inch display
3.TF Card Slot:Support expandable SD memory card (please purchase by yourself)
4.TYPE-C Interface :TYPE-C port supports voltage 5V-1.2A, please do not exceed the
range.
5.System: ABS+SRS+ECM+TCM
6.Reset: OIL+ EPB+SAS+TPMS+ETS
MUCAR CS4 host computer
• Battery Capacity:600mAh/7.6V
• Screen Size: 5 inches
• Resolution: 480x854 pixel
• Working Voltage: 5V
• Working Current: ≤2.5A
• Working Environment: 32 ℉~122 ℉ (0 ℉~50 ℉)
• Storage Environment: -4 ℉~ 140 ℉ (-20℃~ 60℃)
4 Function Descriptions
The MUCAR CS4 host computer have 7 functions, namely, OBD, Scan, Maintenance &
Service, File, Repair Info, Setup and Update.

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If you want to pause the scan, click “Pause”.
After the scan is over, the system will display the diagnostic report directly. The DTC can
be hidden by clicking the button after it.
The system with DTC will be displayed on the screen in red font, and the specic number
of DTC will be shown. A DTC-free system will be displayed as "OK".
Click the system name to see the specic denition of the DTC.
B. System Scan: Automatically scan all systems of the vehicle.
C. System Selection: Manually choose the automotive electronic control system.
2. Choose the system: Click “PCM” (e.g.), and the screen will enter selection interface.
A. Health Report: this mode is to quickly check the vehicle and display the vehicle health
report (it’s available only when the the diagnosis software support this function). After
clicking “quick test”, the system starts scanning DTC separately and show the result.

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conform to the operation instructions and procedures described in the car maintenance manual to
conrm the root cause of the breakdown.
As shown below, click “Read Fault Code”, and then the screen will display diagnostic
results.
Screen buttons:
Freeze frame: If this button is highlighted, it means there is freeze frame information.
The freeze frame serves to record some specic data streams at the moment when the
car breaks down. The number is for verication.
Report: Save the current diagnosis result as a diagnosis report. The diagnostic report
is saved in the File module and can be sent to designated e-mail boxes.
Tips: After the report is produced, the technician can take a real-time photo of the vehicle and save it as
a vehicle maintenance le.
C. Clear Fault Code
This function serves to clear the DTC of the ECU memory of the tested system.
Click “Clear Fault Code”, and then the system can automatically delete the existing DTC
and pop up the dialogue box saying “DTC successfully cleared”.
Note: For general vehicles, please strictly follow the normal sequence: read the DTC , clear it, have a
test run, read the DTC again for verication, repair the vehicle, clear the DTC, and try again to conrm
that the DTC no longer appear.
D. Read Data Stream
This function is majorly used to read and display real-time data and parameters of the car
ECU. Through observing these data streams, maintenance technicians can understand
3. Choose the function: click the function to be tested.
Tips: The diagnosis menu varies with di󰀨erent vehicles.
A. Version Information
As shown in the picture, click “Version Information” to read the current version information
of the car ECU.
B. Read Fault Code
This function is to read the DTC in the ECU memory, helping maintenance person to
quickly identify the cause of the vehicle breakdown.
Tips: Reading the DTC when troubleshooting a vehicle is only a small step in the entire diagnostic
process. Vehicle DTC are for reference only, and parts cannot be replaced directly based on the given
DTC definition. Each DTC has a set of test procedures. The maintenance technician must strictly

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you want to stop the reading, click “stop” (the white box before the progress bar). The
diagnostic record is saved in the File module. It can be sent to designated e-mail boxes
and reviewed for troubleshooting and analysis.
If the 1 / X appears, it means that the data stream options haven’t fully displayed. Swipe
the screen from bottom to top to display the remaining options. With 3 display modes
available, you can browse it with suitable ways:
• Figure: Displays parameters with wave patterns.
• Value: The default display mode shows parameters with numbers and lists.
Note: If the value of the data stream is not within the standard value range, the data stream will be
displayed in red.
• Combine: The graphs are presented together for users to make comparisons.
Note:di󰀨erent data ow options are marked in di󰀨erent colors.
How to check one wave pattern?
Click .
On the display page of wave patterns.
Choose the data stream options to be checked (Note: Only a maximum of 4 data streams
can be displayed).
If you want to remove the wave pattern of some data stream, just deselect it.
How to check several wave patterns together?
Click [Combine] button and then the system will display the parameters of the selected
data streams with wave patterns.
the vehicle’s overall performance and o󰀨er maintenance suggestions.
Screen buttons:
Select all: If you want to check some data stream, tick the box before its name. If you
want to choose all the data streams, click this button.
Deselect: Click this button to deselect all checked data streams.
OK: Conrm current operations. Click "OK" after selection, and then the system will
display the dynamic data of selected data streams.
Screen buttons:
(Graph): Click it and the data streams are displayed in dynamic wave patterns.
Report: Click the button to save the number of current data streams.
Record: It’s used to record diagnosis data so that users can replay and check it. If

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5. Maintenance & Reset
The main unit has 4 most commonly used maintenance reset functions that are free for
life, which are Maintenance Light Reset(OIL) + Brake Pad Reset (EPB) + Steering
Angle Reset (SAS)+ Tire Pressure Reset (TPMS)+Throttle Matching (ETS)
5.1.1 Select "Maintenance and Reset" to enter the functions list
5.1.2 Select"Vehicle Brands "to enter the mainteance reset and
mainteance correction,Select automatic and manual modes to view
items that need maintenance
Diagnosis History
Usually, every time a car is diagnosed, the system will record each step. This function
helps users quickly enter a previously tested vehicle and continue its testing without
starting anew. Click “History” and all previous records will be displayed on the screen
chronologically.
Screen buttons:
Select all: click it and select all diagnosis records.
Delete: click the button to delete some checked diagnosis record.
Unselect: click it to deselect all checked diagnosis records.
Click some diagnosis record to check details about vehicle information and DTC.
Click “Quick access” to test other systems.

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will go out and the system will start a new maintenance cycle.
5.2.2 Steering Angle Reset (SAS)
Find the position where the car keeps driving straight. With this position as a reference,the
ECU can calculate the accurate angle when the car turns left and right. Generally, after
replacing the steering angle position sensor, replacing the mechanical parts of the steering
system (such as steering gear, steering column, tie rod ball head, steering knuckle),
completing the four-wheel positioning, body repair, etc., it is required to reset the steering
angle to zero.
5.2.3 Brake Pad Reset (EPB)
When the brake pad reaches certain thickness, the brake pad induction wire will be worn.
At this time, the wire will send a signal induction wire to the on-board computer to prompt
the replacement of the brake pad. After replacing the brake pad, the brake pad need to be
reset, otherwise the car will continue to alarm. Situations when the reset is required:
a) After the brake pad is replaced and when brake pad wears sensors;
b) When the brake pad indicator lightens;
c) After the brake pad sensor circuit is repaired;
d) After the servo motor is replaced.
5.2.4 Tire Pressure Reset (TPMS)
When the car tire pressure fault indicator light is on, this function is to reset the tire
pressure and turn o󰀨 the tire pressure fault indicator.
If the tire pressure is too low or leaks, replace or install tire pressure monitoring equipment,
and replace the tire. When the vehicle with a damaged tire pressure sensor and tire
pressure monitoring function has rotated its tires, the tire pressure reset must be carried
out after maintenance.
5.2.5 Throttle Matching (ETS)
Throttle matching is to utilize the car decoder to initialize the throttle actuator so that the
learning value of the ECU returns to the initial state. By doing these, the movement of the
throttle (or idle motor) can be more accurately controlled, thus adjust the intake volume.
Situations when throttle matching is needed:
a) After replacing the electronic control unit, the relevant characteristics of the throttle
operation have not been stored in the electronic control unit.
b) After the electric control unit is powered o󰀨, the memory of the electric control unit’s
5.2.1 Maintenance Light Reset(OIL)
The lightening of the car maintenance light indicates that the vehicle needs maintenance.
Reset the mileage or driving time to zero after the maintenance, so the maintenance light

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If you did not download the software in process of product registration or a pop-up
message reminding you that some new software can be updated, you may use this option
to download it or keep it synchronized with the latest version.
5.6 Settings
The host uses system settings. After the initial setting is completed, the user can modify or
add related information here or swipe the screen from the top to make settings.
5.6.1 Customer management
Information of all clients whose vehicles have been diagnosed will be displayed here in
turn.
5.6.2 Network
Set the connectable WIFI network.
5.6.3 Firmware upgrade
Used to update the rmware.
6 Q&A
Here we list some common questions and answers related to this tool.
Q: Why does it have no responses when connected to a car computer?
A: Check whether the connection with the vehicle diagnostic socket is normal, whether the
ignition switch is on, and whether the tool supports the car.
Q: Why does the system stop while reading the data stream?
A: This may be caused by loose diagnostic dongles. Please unplug the dongle and
memory is lost.
c) After replacing the throttle assembly, you need to match the throttle.
d) After replacing or disassembling the intake port, the controlling of the idle speed by the
coordination between the electronic control unit and the throttle body is a󰀨ected.
e) Although the characteristics of the idle throttle potentiometer have not changed, the
intake volume has changed and the idle control characteristics have changed at the
same throttle openings.
5.3 File
It is used to record and establish the le of the diagnosed vehicles. The le is created
based on the vehicle VIN and check time, including all diagnostic-related data such as
diagnostic reports, data stream records and screenshots.
5.4 Repair Info
It includes 4 items, namely, a fault code data base, a table of vehicles able to be
diagnosed, videos, a learning course. The maintenance technician can quickly refer to
the explanation of the fault codes, and understand all the vehicles that can be diagnosed
through the table. The videos contain equipment usage guides, maintenance and
diagnosis guides. The learning course demonstrates how tools are operated. These
four functions help technicians quickly grasp the equipment use and improve diagnostic
e󰀩ciency.
5.5 Software update
This module allows you to update the diagnostic software & App and set frequently used
software.

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reconnect it rmly.
Q: Why does the host screen ash when the engine ignition starts?
A: It is normal and caused by electromagnetic interference.
Q: How to upgrade the system software?
A: 1. Start the tool and ensure a stable Internet connection.
2. Go to "Set up" -> “App Update”, click "OTA" and then click “check version” to enter
the system upgrade interface.
3. Complete the process by following the instructions on the screen step by step. It
may take a few minutes depending on the internet speed. please be patient. After
successfully completing the upgrade, the tool will automatically restart and enter the
main interface.
Q: Please explain the account and points.
A: To use MUCAR CS4, you need to register an account. Each account has the opportunity
to earn points by recommending others to buy products and participating in o󰀩cial
events. 1 point can be deducted for 1 dollar when purchasing products or services.
Q: How to capture the screenshot?
A: A "Screenshot" icon is always oating on the screen. Tap it to capture the current screen
and the screenshot is saved in the File module.
7 Warranty Terms
Life-time technical support and 12 months warranty(including electronic products for
damages caused by defects in materials or workmanship) are the most basic. Damages
to the equipment or components caused by abusing, unauthorized modication, using for
non-designed purposes, operation in a manner not specied in the instructions, etc.are not
covered by this warranty. The compensation for dashboard damage caused by the defect
of this equipment is limited to repair or replacement. MUCAR does not bear any indirect
and incidental losses.
Please contact Online Customers Service via the order interface.
Service Line: 1-833-692-2766
Customer Service Email: [email protected]
O󰀩cial Website: https://www.mucarco.com/
Products tutorial, videos, FAQ and coverage list are available on MUCAR o󰀩cial website.
Précautions de Sécurité et Avertissements
Pour éviter des victimes, des pertes aux biens ou des dommages accidentels au produit,
lisez toutes les informations de cette section avant d'utiliser le produit.
Manipuler l'équipement avec soin
Ne laisser pas tomber, ne plier pas ou ne percer pas l'outil, et n'insérer pas d'objets
supplémentaires dans l'appareil ou ne placer pas d'objets lourds sur l'appareil. Les
composants vulnérables à l'intérieur peuvent être endommagés.
Ne pas démonter ou modier l'équipement
L'appareil est scellé sans aucune pièce réparable à l’intérieur par l'utilisateur. Toutes
les réparations internes doivent être e󰀨ectuées par une organisation de maintenance
autorisée ou un technicien qualié. La garantie sera terminée si vous tentez de démonter
ou de modier le l'appareil.
Ne pas essayer de remplacer la batterie interne
La batterie interne au lithium rechargeable doit être remplacée par le poste de
maintenance autorisé ou technicien qualié. Contacter le revendeur pour un remplacement
en usine.
Informations sur l'adaptateur
Évitez de plonger l'appareil dans l'eau ou de le placer dans un endroit humide. Lors d'une
utilisation normale, le chargeur peut devenir chaud. Veuillez vous assurer qu'il y a une
bonne ventilation pendant le chargement de l'appareil.
S’il y a une des situations suivantes, veuillez débrancher le chargeur:
• Le chargeur est exposé à la pluie, au liquide ou dans un environnement avec un
chevauchement excessif.
• Le chargeur a des dommages physiques.
• Le chargeur est en cours de nettoyage.
Protection des données et des logiciels
Ne supprimez pas les chiers inconnus et ne changer pas les noms des chiers ou
répertoires créés par d'autres, sinon le logiciel de l'appareil peut ne pas fonctionner.
！Remarque: l'accès aux ressources réseau rend l'appareil vulnérable aux virus informatiques,
aux pirates informatiques, aux logiciels espions et à d'autres comportements malveillants, et peut
endommager l'appareil, les logiciels ou les données. Pour vous assurer que vous utilisez des pare-
feu, des logiciels antivirus et des logiciels antispyware pour protéger votre ordinateur et gardez ces
logiciels à jour.

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Précautions d'utilisation de cet outil
• Assurez-vous que le contacteur d'allumage doit être en position OFF lorsque vous
branchez et débranchez le connecteur de diagnostic.
• Gardez le connecteur dans la boîte de rangement à l'arrière de l'unité principale, lorsque
le diagnostic du véhicule est terminé.
• Appuyez doucement sur le connecteur de diagnostic pour faire apparaître le connecteur
de diagnostic. Ne pas tirez et utilisez des objets pointus pour faire levierr le connecteur.
Précautions relatives à l'utilisation de l'ECU du véhicule
• Ne pas déconnectez la batterie ou les câbles de câblage du véhicule lorsque le
contacteur d'allumage est activé, car cela pourrait éviter d'endommager les capteurs ou
l'ECU.
• Ne placez aucun objet magnétique près de l'ECU. Débranchez l'alimentation électrique
de l'ECU avant d'e󰀨ectuer toute opération de soudage sur le véhicule.
• Soyez extrêmement prudent lorsque vous e󰀨ectuez des opérations près de l'ECU ou
des capteurs. Mettez-vous à la terre lorsque vous démontez la PROM, sinon l'ECU et
les capteurs peuvent être endommagés par l'électricité statique.
• Lorsque vous reconnectez le connecteur du faisceau de l'ECU, assurez-vous qu'il
est attaché fermement, sinon les circuits intégrés à l'intérieur de l'ECU peuvent être
endommagés.
Contenu
1 Manuel de démarrage rapide..........................................................................1
1.1 Utilisation initiale.............................................................................................................1
1.1.1Allumer la machine .................................................................................................1
1.1.2 Réglage de la langue.............................................................................................1
1.1.3 Connecter le Wi-Fi.................................................................................................2
1.1.4 Choisir le fuseau horaire........................................................................................2
1.1.5 Accord de l'utilisateu ..............................................................................................2
1.1.6 Créer un compte....................................................................................................3
1.1.7 Saisir les informations de l'atelier de réparation ....................................................3
2 Informations générales...................................................................................4
2.1 Diagnostics à bord (OBD) II............................................................................................4
2.2 Codes de problème de diagnostic (DTCs) .....................................................................4
2.3 Emplacement du connecteur de liaison de données (DLC) ...........................................6
2.4 OBDII Moniteurs de préparation.....................................................................................6
2.5 État de préparation du moniteur OBDII ..........................................................................7
2.6 OBDII Dénitions............................................................................................................8
3 Présentation du produit..................................................................................9
3.1 Présentations générales.................................................................................................9
4 Descriptions des fonctions ..........................................................................11
4.1 Diagnostics .................................................................................................................11
4.2 Diagnostic intelligent .................................................................................................11
5 Entretien et réinitialisation ...........................................................................20
5.1.1 Réinitialisation du voyant de maintenance (OIL) ............................................21
5.1.2Réinitialisation de l'angle de braquage(SAS) .......................................................22
5.1.3Réinitialisation des plaquettes de frein(EPB) ...................................................22
5.1.4 Réinitialisation de la pression des pneus(TPMS) ...........................................22
5.1.5 Correspondance des gaz(ETS) ...........................................................................22
5.2 File ...............................................................................................................................23
5.3 Informations de réparation........................................................................................23
5.4 Mise à jour du logiciel................................................................................................24
5.5 Paramètres..................................................................................................................24
5.5.1 Informations sur le compte ..................................................................................24
5.5.2 Gestion de la clientèle .........................................................................................25
5.5.3 Informations d'a󰀨aires..........................................................................................25
5.5.4 Connexion Internet ..............................................................................................25
5.5.5 Mise à jour du rmware .......................................................................................25
6 Q&R.................................................................................................................25
7 Conditions de garantie ..................................................................................26

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1 Manuel de démarrage rapide
1.1 Utilisation initiale
Les paramètres suivants doivent être dénis lors de la première utilisation de l'outil.
1.1.1Allumer la machine
Après avoir appuyé sur le bouton d'alimentation, les images seront a󰀩chées à l'écran
comme suit.
1.1.2 Réglage de la langue
Sélectionnez la langue de l'outil parmi les langues a󰀩chées sur l'interface.
1.1.3 Connecter le Wi-Fi
Le système recherchera automatiquement tous les réseaux Wi-Fi disponibles et vous
pourrez choisir le Wi-Fi nécessaire. Si le réseau choisi est ouvert, vous pouvez le
connecter directement; Si le réseau choisi est crypté, vous devez entrer le mot de passe
correct. Ensuite, vous pouvez vous connecter Wi-Fi après avoir cliqué sur "se connecter".
Remarque: le Wi-Fi doit être conguré. Si aucun réseau Wi-Fi n'est disponible à proximité, vous pouvez activer
"Hotspot Mobile Portable".
1.1.4 Choisir le fuseau horaire
Choisissez le fuseau horaire de l'emplacement actuel, puis le système congurera
automatiquement l'heure en fonction du fuseau horaire que vous choisissez.
1.1.5 Accord de l'utilisateu
Veuillez lire attentivement toutes les conditions générales de l'accord d'utilisation.

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Choisissez «Accepter toutes les conditions ci-dessus» et cliquez sur le bouton
«Accepter» pour terminer le processus d'inscription. Ensuite, la page passera à l'interface
«Félicitations pour votre inscription réussie».
Les réglages initiaux sont terminés après les étapes ci-dessus. Il passera
automatiquement à l'interface de travail après 3 secondes.
1.1.6 Créer un compte
Vous devez créer un compte via votre boîte e-mail. Si vous possédez d'autres produits
de la série MUCAR, vous pouvez vous connecter directement en utilisant le compte
disponible.
1.1.7 Saisir les informations de l'atelier de réparation
Saisissez les informations de l'atelier de réparation, qui seront a󰀩chées dans le rapport de
diagnostic.
2 Informations générales
2.1 Diagnostics à bord (OBD) II
La première génération de diagnostics à bord (OBD I) a été développée par le California
Air Resources Board (ARB) et mise en œuvre en 1996 pour surveiller certains des
composants de contrôle des émissions des véhicules. À mesure que la technologie
évoluait et que le désir d'améliorer le système de diagnostic à bord augmentait, une
nouvelle génération de système de diagnostic à bord a été développée. Cette deuxième
génération de réglementations de diagnostics à bord est appelée «OBDII». Le système
OBDII est conçu pour surveiller les systèmes de contrôle des émissions et les composants
clés du moteur en e󰀨ectuant des tests continus ou périodiques de composants spéciques
et des conditions du véhicule.Lorsqu'un problème est détecté, le système OBDII allume un
témoin d'avertissement (MIL) sur le tableau de bord du véhicule pour alerter le conducteur
généralement par l'expression «Vérier le moteur» ou «Entretenir le moteur bientôt».
Le système stockera également des informations importantes sur le dysfonctionnement
détecté an qu'un technicien puisse localiser et résoudre le problème avec précision. Ci-
dessous, trois informations précieuses:
1) Si le voyant de dysfonctionnement (MIL) est commandé «allumé» ou «éteint»;
2) Quels codes de problème de diagnostics (DTC), le cas échéant, sont stockés;
3) Statut du moniteur de préparation.
2.2 Codes de problème de diagnostic (DTCs)