DTC B1572


id0902j0831800

DTC B1572

Door ajar LR circuit open

DETECTION CONDITION

Open circuit in wiring harness between PJB and rear door latch switch (LH)

POSSIBLE CAUSE

• Open circuit in wiring harness between PJB terminal J-06 S and rear door latch and lock actuator (LH) terminal G
• Rear door latch and lock actuator malfunction
• PJB malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
INSPECT REAR DOOR LATCH AND LOCK ACTUATOR (LH) CONNECTOR
• Turn the ignition switch off.
• Disconnect the rear door latch and lock actuator (LH) connector.
• Inspect the rear door latch and lock actuator (LH) connector terminals for poor connection (such as damaged/pulled-out pins, and corrosion).
• Is there any malfunction?
Yes
Repair or replace the terminal, then go to Step 5.
No
Go to the next step.
2
INSPECT PJB CONNECTOR
• Disconnect the PJB connector.
• Inspect the PJB connector terminals for poor connection (such as damaged/pulled-out pins, and corrosion).
• Is there any malfunction?
Yes
Repair or replace the terminal, then go to Step 5.
No
Go to the next step.
3
INSPECT REAR DOOR LATCH AND LOCK ACTUATOR (LH) SIGNAL CIRCUIT FOR OPEN CIRCUIT
• Inspect for continuity between PJB terminal J-06 S (wiring harness-side) and rear door latch and lock actuator (LH) terminal G (wiring harness-side).
• Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness for a possible open circuit, then go to Step 5.
4
INSPECT REAR DOOR LATCH AND LOCK ACTUATOR (LH)
• Inspect the rear door latch and lock actuator (LH).
• Is there any malfunction?
Yes
Replace the rear door latch and lock actuator (LH), then go to the next step.
No
Go to the next step.
5
VERIFY TROUBLESHOOTING COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PJB memory using the WDS or equivalent.
• Perform the self-test.
(See PJB SELF-TEST.)
• Is the same DTC present?
Yes
Replace the PJB.
No
DTC troubleshooting completed.