Diagnosis Procedure
- CHECK POWER SUPPLY CIRCUIT (DISPLAY SIDE)
Check voltage between display unit harness connector and ground.
Signal name Connector No. Terminal No. Ignition switch position Value (Approx.) Inverter VCC M71 2 ACC 9.0 V Signal VCC 3 Is the inspection result normal?
YES
GO TO STEP 4.
NO
GO TO STEP 2.
- CHECK POWER SUPPLY CIRCUIT (CONTINUITY)
- Turn ignition switch OFF.
- Disconnect the harness connector between display unit and AV control unit.
- Check continuity between display unit harness connector M71 and AV control unit harness connector.
Signal name Display unit (M71) AV control unit (M202) Continuity Inverter VCC 2 48 Existed Signal VCC 3 36 Existed - Check continuity between display unit harness connector and ground.
Signal name Display unit (M71) - Continuity Inverter VCC 2 Ground Not existed Signal VCC 3 Ground Not existed
Is the inspection result normal?
YES
GO TO STEP 3.
NO
Repair harness or connector.
- CHECK POWER SUPPLY CIRCUIT (AV CONTROL UNIT SIDE)
- Connect the AV control unit harness connector.
- Turn ignition switch ACC.
- Check voltage between AV control unit harness connector and ground.
Signal name Connector No. Terminal No. Ignition switch position Value (Approx.) Inverter VCC M202 48 ACC 9.0 V Signal VCC 36 Is the inspection result normal?
YES
INSPECTION END
NO
Replacement of AV control unit.
- CHECK GROUND CIRCUIT
- Turn ignition switch OFF.
- Disconnect display unit connector.
- Check continuity between display unit harness connectors and ground.
Signal name Connector No. Terminal No. Ignition switch position Continuity Ground M71 1 OFF Existed
Is the inspection result normal?
YES
INSPECTION END
NO
Repair harness or connector.