DTC B1472


id0902j0831500

DTC B1472

Headlight on status switch input circuit short to ground

DETECTION CONDITION

Short to GND in wiring harness between PJB and light switch (low beam)

POSSIBLE CAUSE

• Short to GND in wiring harness between PJB terminal J-03 AS and light switch terminal B
• Light switch malfunction
• PJB malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
INSPECT LIGHT SWITCH CONNECTOR
• Disconnect the light switch connector.
• Inspect the light switch 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 LIGHT SWITCH SIGNAL CIRCUIT FOR SHORT TO GND
• Inspect for continuity between PJB terminal J-03 AS (wiring harness-side) and body GND.
• Is there continuity?
Yes
Repair or replace the wiring harness for a possible short to GND, then go to Step 5.
No
Go to the next step.
4
INSPECT LIGHT SWITCH
• Inspect the light switch.
• Is there any malfunction?
Yes
Replace the light switch, 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.