Autel MaxiDiag MD805 User manual

Table of Contents
1. SAFETY PRECAUTIONS AND WARNINGS............................................1
2. GENERAL INFORMATION......................................................................2
2.1 ON-BOARD DIAGNOSTICS (OBD)II..............................................................2
2.1.1 DIAGNOSTIC TROUBLE CODES (DTCS)......................................................2
2.1.2 OBDIIMODES OF OPERATION..................................................................3
2.2 OIL SERVICE RESET REVIEW........................................................................5
2.3 EPB REVIEW................................................................................................5
3. USING THE SCAN TOOL..........................................................................6
3.1 TOOL DESCRIPTION......................................................................................6
3.2 SPECIFICATIONS ...........................................................................................8
3.3 ACCESSORIES INCLUDED...............................................................................8
3.4 KEYBOARD...................................................................................................8
3.5 POWER.........................................................................................................8
3.6 SYSTEM SETUP .............................................................................................9
3.7 VEHICLE COVERAGE ..................................................................................13
3.8 PRODUCT TROUBLESHOOTING ....................................................................13
4. PLAYBACK DATA...................................................................................15
4.1 REVIEWING DATA.......................................................................................15
4.2 DELETING DATA.........................................................................................16
4.3 PRINTING DATA..........................................................................................16
5. DIAGNOSTICS .........................................................................................17
5.1 ENTERING VEHICLE INFORMATION.............................................................17
5.2 DIAGNOSTIC TEST ......................................................................................22
5.3 DIAGNOSTIC OPERATION ............................................................................26
6. OBD II DIAGNOSTICS.............................................................................32
6.1 READ CODES ...............................................................................................33
6.2 ERASE CODES.............................................................................................36
6.3 LIVE DATA ..................................................................................................38

6.4FREEZE FRAME ...........................................................................................43
6.5 RETRIEVING I/M READINESS STATUS..........................................................44
6.6O2MONITOR TEST......................................................................................47
6.7ON-BOARD MONITOR TEST .........................................................................49
6.8 COMPONENT TEST.......................................................................................52
6.9 VIEWING VEHICLE INFORMATION................................................................53
6.10MODULES PRESENT ...................................................................................54
6.11 DTCLOOKUP............................................................................................55
7. OIL RESET................................................................................................57
7.1.GENERAL INFORMATION.............................................................................57
7.2.RESET OPERATION .....................................................................................57
8. EPB ............................................................................................................64
8.1.EPB SAFETY ..............................................................................................64
8.2.EPB MAINTENANCE ...................................................................................64
8.3.ABS MAINTENANCE ...................................................................................73
9. PRINT DATA.............................................................................................76
10. SOFTWARE UPDATE..............................................................................78
10.1. REGISTER THE TOOL...............................................................................78
10.2. UPDATE PROCEDURE...............................................................................79
10.3. VIEW OR DELETE PROGRAMS..................................................................81
11. WARRANTY AND SERVICE...................................................................83
11.1. LIMITED ONE YEAR WARRANTY .............................................................83
11.2. SERVICE PROCEDURES ............................................................................83

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1. Safety Precautions and Warnings
To prevent personal injury or damage to vehicles and/or the scan
tool, read this instruction manual first and observe the following
safety precautions whenever working on a vehicle:
Always perform automotive testing in a safe environment.
Wear safety eye protection that meets ANSI standards.
Keep clothing, hair, hands, tools, test equipment, etc. away from
all moving or hot engine parts.
Operate the vehicle in a well-ventilated work area: Exhaust gases
are poisonous.
Put blocks in front of the drive wheels and never leave the vehicle
unattended while running tests.
Be extra cautious when working around the ignition coil,
distributor cap, ignition wires and spark plugs. These
components produce hazardous voltages when the engine is
running.
Put the transmission in PARK (for automatic transmission) or
NEUTRAL (for manual transmission) and make sure the parking
brake is engaged.
Keep a fire extinguisher suitable for gasoline/chemical/ electrical
fires nearby.
Don’t connect or disconnect any test equipment while the
ignition is on or the engine is running.
Keep the scan tool dry, clean, free from oil/water or grease. Use a
mild detergent on a clean cloth to clean the outside of the scan
tool, when necessary.

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2. General Information
2.1 On-Board Diagnostics (OBD) II
The first generation of On-Board Diagnostics (called OBD I) was
developed by the California Air Resources Board (ARB) and
implemented in 1988 to monitor some of the emission control
components on vehicles. As technology evolved and the desire to
improve the On-Board Diagnostic system increased, a new generation
of On-Board Diagnostic systemwas developed. This second generation
of On-Board Diagnostic regulations is called "OBD II".
The OBD II system is designed to monitor emission control systems
and key engine components by performing either continuous or
periodic tests of specific components and vehicle conditions. When a
problem is detected, the OBD II 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 find and fix the problem. Here below
are 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.
2.1.1Diagnostic Trouble Codes (DTCs)
OBD II Diagnostic Trouble Codes are codes that 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 are intended to provide you with a guide as to where a fault
might be occurring within a vehicle. OBD II Diagnostic Trouble
Codes consists ofa five-digit alphanumeric code. The first character,
a letter, identifies which control system sets the code. The other four
characters, all numbers, 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:

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2.1.2OBDII Modes of Operation
Below is a brief description of OBDII 10 modes.
Mode $01 –Identifies the Powertrain information and shows
current data available to the scan tool. This data includes: DTC set,
status of on-board tests, and vehicle data such as engine RPM,
temperatures, ignition advance, speed, air flow rates, and closed
loop status for fuel system.
Mode $02 –Displays Freeze Frame data. Same data as in mode 1,
but it was captured and stored when a malfunction occurred and a
DTC was set. Some of the PIDs for mode one are not implemented
in this mode.
Mode $03 –Displays the type of powertrain or emission related
DTCs stored by a 5 digit code identifying the faults. There may be

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more than one response message if there are more trouble codes
than will fit in the data bytes of the response message, or if there
are more than one ECU computer responding.
Mode $04 –Used to clear DTCs and Freeze Frame data. This
clears all diagnostic trouble codes that may be set including freeze
frame data and readiness monitors.
Mode $05 –Displays oxygen sensor test results. This mode
displays the oxygen sensor monitor screen and the test results
gathered about the oxygen sensor.
There are ten numbers available for diagnostics:
1. $01 Rich-to-Lean O2 sensor threshold voltage.
2. $02 Lean-to-Rich O2 sensor threshold voltage.
3. $03 Low sensor voltage threshold for switch time measurement.
4. $04 High sensor voltage threshold for switch time measurement.
5. $05 Rich-to-Lean switch time in ms.
6. $06 Lean-to-Rich switch time in ms.
7. $07 Minimum voltage for test.
8. $08 Maximum voltage for test.
9. $09 Time between voltage transitions in ms.
Mode $06 –Non-continuously Monitored Systems test results.
There are typically a minimum value, a maximum value, and a
current value for each non-continuous monitor. This data is
optional, and it is defined by a given vehicle maker if it’s used.
Mode $07 –A request for DTCs (pending) from Continuously
Monitored Systems after a single driving cycle has been performed
to determine if the repair has fixed a problem. This is used by
service technicians to verify repair was performed properly and
after clearing diagnostic trouble codes.
Mode $08 –This special Control Mode requests control of the
on-board system, test, or component bi-directionally (where
applicable). This mode is manufacturer specific.

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Mode $09 –Reports vehicle information. This information
includes VIN number and calibration information stored in the
vehicle ECUs.
Mode $0A –Requests emission-related DTCs with permanent
status. This mode is required for all emissions-related DTCs. The
presence of permanent DTCs at an inspection without the MIL
illuminated is an indication that a proper repair was not verified by
the on-board monitoring system.
2.2 Oil Service Reset Review
The Engine Oil Life System calculates when to change the engine oil
and filter based on vehicle use. An oil change is required whenever
indicated by the display or according to the recommended
maintenance schedule. Whenever the oil is changed, reset the system
so it can calculate when the next oil change is required. If you
change the oil prior to a service indicator being turned on, please also
reset the system.
2.3 EPB Review
The EPB is a system which controls the brake force by pulling the
parking cable as in conventional existing parking brakes. EPB
system includes a DC motor, a gearbox, a screw, a nut, a current
sensor, a Hall-effect force sensor, an acceleration sensor and an
ECU.
Generally, if a driver or a high level system operates the EPB system,
the controller calculates a target force from the parking cable based
on the car mass as well as the inclination of the road as measured by
the acceleration sensor. The EPB increases the brake force by pulling
the parking cable using the DC motor until the brake force reaches
the target force. Brake force is measured by the Hall-effect force
sensor.

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3. Using the Scan Tool
3.1 Tool Description
1) CONNECTOR -- Connects the scan tool to the vehicle’s Data
Link Connector (DLC).
2) LCD DISPLAY -- Indicates test results.
3) FUNCTION BUTTON –Corresponds with “buttons”on
screen for executing commands.

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4) ESC BUTTON -- Cancels a selection (or an action) from a
menu or returns to the previous screen.
5) LEFT SCROLL BUTTON -- When looking up DTC
definitions, moves to the previous character and views
additional information on previous screens if the DTC definition
covers more than one screen; views previous screen or previous
frames of recorded data. It is also used to view previous trouble
code when viewing DTCs.
6) HELP BUTTON -- Provides help information and the
description of DTCs.
7) DOWN SCROLL BUTTON -- Moves down through
menu and submenu items in menu mode. When more than one
screen of data is retrieved, moves down through the current
screen to the next screens for additional data. When looking up
DTC, it is used to change the value of selected character.
8) RIGHT SCROLL BUTTON -- When looking up DTC
definitions, moves to the next character and view additional
information on the next screens if the DTC definition covers
more than one screen; views next screen or next frames of
recorded data. It is also used to view next trouble code when
viewing DTCs.
9) OK BUTTON -- Confirms a selection (or an action) froma
menu.
10) UP SCROLL BUTTON -- Moves up through menu and
submenu items in menu mode. When more than one screen of
data is retrieved, moves up through the current screen to the
previous screens for additional data. When looking up DTC, it is
used to change the value of selected character.
11) TF CARD SLOT –Holds the TF card.
12) USB PORT -- Connects the scan tool to the PC for printing.

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3.2 Specifications
Display
2.8” TFT color display (320 x 240 dpi)
Operating
Temperature
0 to 60°C (32 to 140 °F)
Storage
Temperature
-20 to 70°C (-4 to 158 °F)
Dimensions
(W x H x D)
100mm (3.94”) x 200mm (7.87”) x 37.5mm
(1.48”)
Weight
(Without wire)
0.26kg (0.57lb.)
3.3 Accessories Included
1) User’s Manual -- Instructions on tool operations.
2) CD -- Includes user manual, Autel update software, etc.
3) OBD II Cable -- Provides power to the tool and communicates
between the tool and the vehicle.
4) USB Cable -- Used to upgrade the scan tool, and to print
retrieved data.
5) TF Card -- Contains the scan tool’s operation software and
applications.
6) Carry Case -- A nylon case tostore the scan tool.
3.4 Keyboard
No solvents such as alcohol are allowed to clean the keypad or the
display. Use a mild, nonabrasive detergent and a soft cotton cloth. Do
not soak the keypad as it is not waterproof.
3.5 Power
The scan tool is powered via the Data Link Connector (DLC). Just
follow the steps below to turn on the scan tool:
1) Connect the cable to scan tool.
2) Find DLC on the vehicle.

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A plastic DLC cover may be found for some vehicles and you
need to remove it before plugging the OBD II cable.
3) Plug the cable into the vehicle’s DLC.
4) Power up the scan tool, and wait for the Main Screen to appear.
(Figure 3.1)
Figure 3.1
3.6 System Setup
The system Setup functions allow you to adjust default settings and
view information about the scan tool.
1) Language: Selects the desired language.
2) Unit of Measure: Sets the unit of measure to English or Metric.
3) Beep Set: Turns on/off the beep.
4) LCD Test: Checks if the LCD display is working properly.
5) Key Test: Checks if the keyboard is working properly.
6) About: Provides information of the scan tool.
Settings of the unit will remain until a change to the existing
settings is made.
To enter the Setup menu
From the Main Screen, use LEFT/RIGHT scroll button to select
Setup, and press the OK button. Following the instructions to make

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adjustments and settings could make your diagnosis easier and more
convenient. (Figure 3.2)
Figure 3.2
Language Setup
English is the default language.
1) From Setup screen, use the UP/DOWN scroll button and
LEFT/RIGHT scroll button to select Language, and press the
OK button.
2) Use the UP/DOWN scroll button to select the desired language
and press the OK button to save your selection and return to the
previous screen. (Figure 3.3)
Figure 3.3

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Unit of Measure
Metric is the default measurement unit.
1) From Setup screen, use the LEFT/RIGHT scroll button to
select EN/METRIC Unit and press the OK button.
2) From Unit of Measure screen, use the LEFT/RIGHT scroll
button to select the desired unit of measurement. (Figure 3.4)
Figure 3.4
3) Press the OK button to save your selection and return to the
previous menu. Or, press the ESC button to exit without saving.
Beep Set
The default setting is Beep On.
1) From Setup screen, use the UP/DOWN scroll button and
LEFT/RIGHT scroll button to select Beep and press the OK
button.
2) From Beep Set menu, use the LEFT/RIGHT scroll button to
select ON or OFF to turn on/off the beep. (Figure 3.5)

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Figure 3.5
3) Press the OK button to save your selection and return to the
previous menu. Or, press the ESC button to exit without saving.
Key Test
The Key Test function checks if the keyboard is working properly.
1) From Setup screen, use the UP/DOWN scroll button and
LEFT/RIGHT scroll button to select Key Test, and press the
OK button.
2) Press any key to start the test. When you press a key, the edge
around the corresponding key on the screen should turn to red.
Otherwise, the key is not functioning properly.
3) Double press the ESC button to return to the previous menu.
LCD Test
The LCD Test function checks if the LCD display is working
normally.
1) From Setup screen, use the UP/DOWN scroll button and
LEFT/RIGHT scroll button to select LCD Test, and press the
OK button.
2) Look for missing spots in the blue, green, red, white and black
LCD display.
3) When completed, press the ESC button to exit.

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About
The About function allows viewing of some important information
such as serial number and software version number of the scanner.
1) From Setup screen, use the UP/DOWN scroll button and
LEFT/RIGHT scroll button to select About and press the OK
button; wait for the About screen to appear.
2) View tool information on the screen. Press the ESC
button to exit.
3.7 Vehicle Coverage
On the basis of all OBD II compliant vehicles, including those
equipped with universal protocol -- Control Area Network (CAN),
MaxiDiagMD805 Scanner expands vehicle system coverage and
offers more diagnostic power to the vehicle technicians. Featuring
expanded global vehicle coverage, the scan tool offers technicians a
significant improvement on model years covered by supported
manufacturers.
For a complete listing of all the added vehicle coverage, download a
copy of the official Software Release Note.
3.8 Product Troubleshooting
Vehicle Linking Error
A communication error occurs if the scan tool fails to communicate
with the vehicle’s ECU (Electronic Control Unit). You need to do
the following to check up:
Verify that the ignition is ON.
Check if the scan tool’s connector is securely connected to the
vehicle’s DLC.
Turn the ignition off and wait for about 10 seconds. Turn on the
ignition again and continue the testing.
Verify the control module is not defective.
Operating Error

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If the scan tool freezes, then an exception occurs or the vehicle’s
ECU (Electronic Control Unit) is too slow to respond to requests.
You need to do the following to reset the tool:
Reset the scan tool.
Turn the ignition off and wait for about 10 seconds. Turn the
ignition back to on and continue the testing.
Scan tool doesn’t power up
If the scan tool won’t power up or operates incorrectly in any other
way, you need to do the following to check up:
Check if the scan tool’s connector is securely connected to the
vehicle’s DLC;
Check if the DLC pins are bent or broken. Clean the DLC pins if
necessary.
Check the vehicle battery to make sure it is still good with at least
8.0 volts.

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4. Playback Data
The Playback data function allows viewing data from the last
test recorded by the scan tool.
NOTE: The amount of files that can be saved depends on the
space available on the TF card.
4.1 Reviewing Data
1) Use the LEFT/RIGHT scroll button to select Playback from
Main Screen (Figure 3.1), and press the OK button. Wait for
the Scan screen to appear. (Figure 4.1)
2) Use the UP/DOWN scroll button to select the desired item from
Scan screen, and press the OK button.
Figure 4.1
If no data from previously tested vehicle is recorded, a message
“No data available!”shows on the screen.
3) Review selected data on the screen. (Figure 4.2)
Figure 4.2
Scan
1. Trouble Code
/scan/make/EUROPE/BMW/save
2. Datastream: complete list
/scan/make/EOBD/
3. Freeze
/scan/make/USA/
Delete Delete All
Fault Codes
0
DME: DMS Digital Motor Electronics:
fault stored
12
Oxygen sensor downstream of
catalytic converter
Print

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4.2 Deleting Data
By selecting Delete on the Scan screen, you can erase the selected
data on the scan tool. Review the recordings thoroughly before
erasing. You could also erase all recordings by select Delete All.
NOTE: Don’t use Delete All unless you are definitely sure what
you are going to proceed.
4.3 Printing Data
The Print option allows you to print the recorded files to your
computer and then to the printer.
For more details, please refer to chapter 9. Print Data.

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5. Diagnostics
NOTE: The screens shown below in this chapter are examples.
Actual screens will vary by vehicle makes and models.
5.1 Entering Vehicle Information
Before using the scan tool to diagnose, you must input the vehicle
information. There are generally three ways to input the vehicle
information.
Vehicle information manual acquisition.
VIN code automatic acquisition.
VIN code manual acquisition.
The way to enter diagnostic procedure depends on the vehicle being
tested.
5.1.1 Vehicle Information Manual Acquisition
Follow these steps to acquire the vehicle information and begin
diagnostics. (Take Ford as an example)
1) Turn on the scan tool and wait for the Main Screen to appear.
2) Select the Scan icon on the Main Screen (Figure 3.1) and then
select the desired vehicle area and make.
Figure 5.1

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Figure 5.2
3) Step by step, select the right options for the vehicle according to
each screen that appears.
Figure 5.3 Figure 5.4
Figure 5.5 Figure 5.6
4) Follow the steps until the complete vehicle information is
entered. Then the scan tool will ask for your confirmation.
DAS
1. Start New Session
2. Manual Vehicle Entry
3. Vehicle selection
Vehicle
1. All other
Traction Assist
1. Not Equipped
2. Equipped
Transmission
1. ASM(Auto Shift Manual)
2. Powershift
3. Manual
4. Automatic
5. DPS6