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DTC B1520

id0902j0834300

DTC B1520 | Bonnet latch switch circuit open
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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
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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. (See BONNET LATCH SWITCH INSPECTION.) • Is there any malfunction? | Yes | Replace the bonnet latch switch, then go to the next step. (See BONNET REMOVAL/INSTALLATION [EXCEPT L3 TURBO].) (See BONNET REMOVAL/INSTALLATION [L3 TURBO].)
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. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)
No | DTC troubleshooting completed.