DTC B1506

id0902j0831600

DTC B1506

turn signal right circuit short to ground

DETECTION CONDITION

Short to GND in wiring harness between BCM and turn switch

POSSIBLE CAUSE

• Light switch malfunction
• BCM malfunction
European (L.H.D. U.K.), General (L.H.D.) specs.
• Short to GND in wiring harness between BCM terminal 4C and light switch terminal A (LH)
• Short to GND in wiring harness between BCM terminal 4E and light switch terminal E (RH)
Australian, General (R.H.D.) specs.
• Short to GND in wiring harness between BCM terminal 4C and light switch terminal M (LH)
• Short to GND in wiring harness between BCM terminal 4E and light switch terminal Q (RH)

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 BCM CONNECTOR
• Disconnect the BCM connector.
• Inspect the BCM 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 following terminals:
- BCM terminal 4C (wiring harness-side) - body GND
- BCM terminal 4E (wiring harness-side) - 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 BCM memory using the WDS or equivalent.
• Is the same DTC present?
Yes
Replace the BCM.
No
DTC troubleshooting completed.