D
Group 177 Preventive Maintenance
W2003778
Engine ECU
21
Check for Fault Codes in the Engine
Electronic Control Unit
Use Service Information in Function Group 23 as a
reference.
When reading fault codes perform the following:
•
The engine is off.
•
The parking brake is applied.
•
The starter key is in the drive position (I).
1 Read on the display that no fault codes are saved in
the EECU.
2 Press the diagnosis button for four seconds.
3 “CHECK ENGINE” lamp shines steadily for three
seconds after the starter key is turned to the drive
position (I).
4 Write down any fault codes.
Fault codes can be read via diagnosis output using a PC.
W5001348
1 Toothed Hub or Tooth Wheel
2 Sensor
3 ECU
4 ABS Valve
5 Relay Valve
6 TCS Valve
7 J1922/J1939 Connector
22
Check for Fault Codes in the ABS, Anti-Lock
brakes
Note: Use Service Information in Function Group 59 as
a reference.
To complete the Fault Code Check for ABS, perform the
following:
1 Check that no fault codes are saved in the ABS ECU.
2 Write down any fault codes require correction.
Note: Fault codes can also be traced using a diagnostic
program run through a PC.
54
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