Diagnosis Procedure
1.CHECK CONNECTOR
- Models without automatic drive positioner
- Models with automatic drive positioner
2.CHECK HARNESS FOR OPEN CIRCUIT

3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the ECM. Refer to EC-157, "Diagnosis Procedure".
Main line between A-bag and ABS circuit
BCM branch line circuitABS warning lamp
Description
Component Function Check
1.CHECK ABS WARNING LAMP OPERATION
Check that the lamp illuminates for approximately 2 seconds after the
ignition switch is turned ON.
Diagnosis Procedure
1.CHECK SELF-DIAGNOSIS
Perform ABS actuator and electric unit (control unit) self-diagnosis.
2. ...
Steering switch
Description
When one of the steering wheel audio control switches is pushed, the
resistance in the steering wheel audio control switch circuit changes,
depending on which button is pushed.
Diagnosis Procedure
1.CHECK STEERING SWITCH RESISTANCE
Disconnect steering switch connector M88. ...
Communication signal circuit
SATELLITE RADIO TUNER
SATELLITE RADIO TUNER : Description
Communication signals are exchanged between the AV control unit and satellite
radio tuner using the communication circuits.
SATELLITE RADIO TUNER : Diagnosis Procedure
1.CHECK HARNESS - 1
Turn ignition switch OFF.
Disconnect sat ...