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 DTC B1520

DTC B1520


id0902j0834300

DTC B1520

Bonnet latch switch circuit open

DETECTION CONDITION

Open circuit in wiring harness between BCM and bonnet latch switch

POSSIBLE CAUSE

• Open circuit in wiring harness between BCM terminal 8M and bonnet latch switch terminal A
• Bonnet latch switch malfunction
• BCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
INSPECT BONNET LATCH SWITCH CONNECTOR
• Turn the ignition switch off.
• Disconnect the bonnet latch switch connector.
• Inspect the bonnet latch 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 BONNET LATCH SWITCH SIGNAL CIRCUIT FOR OPEN CIRCUIT
• Inspect for continuity between BCM terminal 8M (wiring harness-side) and bonnet latch switch terminal A (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 BONNET LATCH SWITCH
• Inspect the bonnet latch switch.
• Is there any malfunction?
Yes
Replace the bonnet latch 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.