Diagnosis Procedure
- CHECK HARNESS CONNECTOR CONNECTION
Check the following harness connector for disconnection or looseness.
- BCM
- Harness connector M59
- Harness connector D32
- Left front door control unit
Is the inspection result normal?
YES
GO TO 2.
NO
Securely connect the harness connectors.
- CHECK POWER SUPPLY AND GROUND CIRCUIT
Check power supply and ground circuit for the following unit.
- BCM: Wiring Diagram
- Left front door control unit: Wiring Diagram
Is the inspection result normal?
YES
GO TO 3.
NO
Repair or replace the malfunctioning part.
- CHECK CIRCUIT (SHORT TO BATTERY)
- Turn ignition switch OFF.
- Disconnect the following unit connectors.
- BCM
- Left front door control unit
- Check voltage between BCM harness connector and ground.
Terminals
Voltage
(Approx.)
+
-
BCM
Ground
Connector
Terminal
M25
8
--
0 V
9
Is the inspection result normal?
YES
GO TO 4.
NO
Repair or replace harness.
- CHECK CIRCUIT (SHORT TO GROUND)
Check continuity between BCM harness connector and ground.
BCM
Ground
Continuity
Connector
Terminal
M25
8
--
Not existed
9
Is the inspection result normal?
YES
GO TO 5.
NO
Repair or replace harness.
- CHECK CIRCUIT (SHORT WITH CAN-H AND CAN-L)
Check continuity between BCM harness connector terminals.
BCM
Continuity
Connector
Terminal
Connector
Terminal
M25
8
M25
9
Not existed
Is the inspection result normal?
YES
GO TO 6.
NO
Repair or replace harness.
- CHECK CIRCUIT (OPEN)
Check continuity between the following unit harness connectors.
- BCM
- Left front door control unitBCM - Left front door control unit
BCM
Left front door control unit
Continuity
Connector
Terminal
Connector
Terminal
M25
8
D12
22
Existed
9
21
Is the inspection result normal?
YES
INSPECTION END
NO
Repair or replace harness.