Diagnosis Procedure
DTC "B129F-03"
- CHECK DTC WITH ELECTRONIC STABILITY PROGRAM CONTROL UNIT
Check that DTC is not detected with electronic stability program control unit.
Is the inspection result normal?
YES
GO TO 2.
NO
Refer to DTC Index .
- CHECK ELECTRONIC STABILITY PROGRAM CONTROL UNIT SIGNAL CIRCUIT
- Turn ignition switch OFF.
- Disconnect BCM connector and electronic stability program control unit connector.
- Check continuity between BCM harness connector and electronic stability program control unit harness connector.
BCM
Electronic stability program control unit
Continuity
Connector
Terminal
Connector
Terminal
E16
157
E46
10
Existed
Is the inspection result normal?
YES
Replace BCM. Refer to Removal and Installation .
NO
Repair or replace harness.
DTC "B129F-11"
- CHECK ELECTRONIC STABILITY PROGRAM CONTROL UNIT SIGNAL CIRCUIT
- Turn ignition switch OFF.
- Disconnect BCM connector and electronic stability program control unit connector.
- Check continuity between BCM harness connector and ground.
BCM
--
Continuity
Connector
Terminal
E16
157
Ground
Not existed
Is the inspection result normal?
YES
Check intermittent incident. Refer to Intermittent Incident .
NO
Repair or replace harness.
DTC "B129F-15"
- CHECK ELECTRONIC STABILITY PROGRAM CONTROL UNIT SIGNAL CIRCUIT 1
- Turn ignition switch OFF.
- Disconnect BCM connector and electronic stability program control unit connector.
- Check continuity between BCM harness connector and electronic stability program control unit harness connector.
BCM
Electronic stability program control unit
Continuity
Connector
Terminal
Connector
Terminal
E16
157
E46
10
Existed
Is the inspection result normal?
YES
GO TO 2.
NO
Repair or replace harness.
- CHECK ELECTRONIC STABILITY PROGRAM CONTROL UNIT SIGNAL CIRCUIT 2
Check voltage between BCM harness connector and ground.
(+)
(-)
Voltage
(Approx.)
BCM
Connector
Terminal
E16
157
Ground
0 V
Is the inspection result normal?
YES
Check intermittent incident. Refer to Intermittent Incident .
NO
Repair or replace harness.