MUCAR CS4 Instruction 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 qualifi 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 qualifi 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 fi les or change the names of fi 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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• Keep the connector in the storage box on the back of the main unit, when the vehicle
diagnosis is fi 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 fi rmly,
otherwise electronic elements, such as ICs inside the ECU, can be damaged.

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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.

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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 cofi gure
the time according to the time zone you choose.

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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 fi 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.

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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 fi 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 specifi 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 fi nd and fi x theproblem.
Here below follow three pieces of such valuable information:
1) Whether the Malfunction Indicator Light (MIL) is commanded ‘on’ or ‘off ’;
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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might be occurring within a vehicle. OBDII Diagnostic Trouble Codes consist of a fi vedigit
alphanumeric code. The fi rst character, a letter, identifi 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 Specifi c
2 - Generic ('P”Codes) and
Manufacturer
Specifi c ("B”,“C”and
“U”Codes)
3 - Includes both Generic
and Manufacturer
Specifi 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 misfi 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

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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 fi nd out if all of the emissions components have been evaluated by the
OBDII system. They are running periodic tests on specifi 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) defi 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 specifi c vehicle
operating conditions. The continuously monitored components listed below are always
ready:
1. Misfi re
2. Fuel System
3. Comprehensive Components (CCM)

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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 misfi 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 specifi 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-off period.
For specifi c information on getting your vehicle’s OBD monitor system ready, please
consult your vehicle owner’s manual.
2.6 OBDII Defi nitions
Powertrain Control Module (PCM) -- OBDII terminology for the on-board computer that

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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 fl ash. This
indicates a severe problem and fl ashing is intended to discourage vehicle operation. The
vehicle onboard diagnostic system cannot turn the MIL off until the necessary repairs are
completed or the condition no longer exists.
DTC -- Diagnostic Trouble Codes (DTC) that identifi es which section of the emission
control system has malfunctioned.
Enabling Criteria -- Also termed Enabling Conditions. They are the vehiclespecifi 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 specifi c enabling
procedures.
OBDII Drive Cycle -- A specifi 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 specifi 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 fl 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
gradual adjustments to the fuel calibration schedule than short-term trim adjustments.
These long-term adjustments compensate for vehicle diff erences and gradual changes
that occur over time.

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3 Introduction to the Product
3.1 General introductions
MUCAR CS 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.
3.1.1 Diagnostic host
21 3 4
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.

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MUCAR CS 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 CS host computer have 8 functions, namely, OBD, Scan, Maintenance &
Service, File, Store, Repair Info, Setup and Update.
4.1 Diagnosis
System diagnosis: it supports more than 100 automo brands, smart diagnosis and
traditional diagnosis covering OBDII diagnosis.
System :ABS+SRS+ECM+TCM
Reset:Oil+ EPB+SAS+TPMS
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.

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If it fails to read VIN, you need to enter VIN manually.

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Diagnosis starts
1. Choos the test mode: after reading VIN, the screen will enter the test mode 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.
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.

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The system with DTC will be displayed on the screen in red font, and the specifi c number
of DTC will be shown. A DTC-free system will be displayed as "OK".
Click the system name to see the specifi c defi 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.
3. Choose the function: click the function to be tested.

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Tips: The diagnosis menu varies with diff 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 defi nition. Each
DTC has a set of test procedures. The maintenance technician must strictly conform to the operation instructions
and procedures described in the car maintenance manual to confi rm the root cause of the breakdown.
As shown below, click “Read Fault Code”, and then the screen will display diagnostic
results.

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Screen buttons:
Freeze frame: If this button is highlighted, it means there is freeze frame information. The
freeze frame serves to record some specifi c data streams at the moment when the car
breaks down. The number is for verifi 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 fi 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 verifi cation, repair the vehicle, clear the DTC, and try again to confi 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
the vehicle’s overall performance and off 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.

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OK: Confi 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
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:diff erent data fl ow options are marked in diff erent colors.
How to check one wave pattern?
Click .
On the display page of wave patterns.

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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.
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.