DTC B1502 [BCM]SM2445889
DTC B1502 [BCM]

id0902f5834200

DTC B1502

Turn signal left circuit short to ground
DETECTION CONDITION
• Short to ground in wiring harness between BCM and turn switch
POSSIBLE CAUSE
• Light switch connector or terminal malfunction
• BCM connector or terminal malfunction
• Short to ground in wiring harness between the following terminals:
― BCM terminal 3R—Light switch terminal A (Light switch left side)
― BCM terminal 3R—Light switch terminal M (Light switch right side)
• Light switch malfunction
• BCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT LIGHT SWITCH CONNECTOR CONDITION
• Turn the ignition switch to the LOCK position.
• Disconnect the negative battery cable.
• Disconnect the light switch connector.
• Inspect the connector and terminals for poor connection (such as damaged/pulled-out pins, and corrosion).
• Is there any malfunction?
Yes
Repair or replace the connector and/or terminal, then go to Step 5.
No
Go to the next step.
2
INSPECT BCM CONNECTOR CONDITION
• Disconnect the BCM connector.
• Inspect the connector and terminals for poor connection (such as damaged/pulled-out pins, and corrosion).
• Is there any malfunction?
Yes
Repair or replace the connector and/or terminal, then go to Step 5.
No
Go to the next step.
3
INSPECT TURN SWITCH (LH) SIGNAL CIRCUIT FOR SHORT TO GROUND
• Light switch and BCM connectors are disconnected.
• Inspect for continuity between the following terminals (wiring harness-side) and body ground:
― Light switch terminal A (Light switch left side)
― Light switch terminal M (Light switch right side)
• Is there continuity?
Yes
Repair or replace the wiring harness for a possible short to ground, then go to Step 5.
No
Go to the next step.
4
INSPECT LIGHT SWITCH
• Inspect the light switch. (See LIGHT SWITCH INSPECTION.)
• Is there any malfunction?
Yes
Replace the light switch, then go to the next step.
(See LIGHT SWITCH REMOVAL/INSTALLATION.)
No
Go to the next step.
5
VERIFY TROUBLESHOOTING COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the BCM using the M-MDS. (See CLEARING DTC [BCM].)
• Perform the BCM DTC inspection using the M-MDS. (See DTC INSPECTION [BCM].)
• Is the same DTC present?
Yes
Replace the BCM.
(See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)
No
DTC troubleshooting completed.