System Diagram

System Description
Power control system
Power consumption control systemSteering 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 WHEEL AUDIO CONTROL SWITCH RESISTANCE
Turn ignition switch ...
Wiring diagram
TIRE PRESSURE MONITORING SYSTEM
Wiring Diagram
...
U1243 display unit
DTC Logic
Diagnosis Procedure
1.CHECK DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUIT
Check display unit power supply and ground circuit
2.CHECK CONTINUITY OF COMMUNICATION CIRCUIT
Turn ignition switch OFF.
Disconnect display unit connector M142 and AV control unit
connector M163.
...