DTC B1520 [BCM]

id0902f5834300

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 1B and bonnet latch switch terminal A

•  Open circuit in wiring harness between bonnet latch switch terminal B and body GND

•  Bonnet latch switch malfunction

•  BCM malfunction

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 1B and bonnet latch switch terminal A • Open circuit in wiring harness between bonnet latch switch terminal B and body GND • 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 6.
1		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 6.
2		No	Go to the next step.
3	INSPECT BONNET LATCH SWITCH SIGNAL CIRCUIT FOR OPEN CIRCUIT • Inspect for continuity between BCM terminal 1B (wiring harness-side) and bonnet latch switch terminal A (wiring harness-side). • Is there continuity?	Yes	Go to the next step.
3		No	Repair or replace the wiring harness for a possible open circuit, then go to Step 6.
4	INSPECT BONNET LATCH SWITCH GND CIRCUIT FOR OPEN CIRCUIT • Inspect for continuity between bonnet latch switch terminal B (wiring harness-side) and body GND. • Is there continuity?	Yes	Go to the next step.
4		No	Repair or replace the wiring harness for a possible open circuit, then go to Step 6.
5	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 LATCH AND RELEASE LEVER REMOVAL/INSTALLATION.)
5		No	Go to the next step.
6	VERIFY TROUBLESHOOTING COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the BCM memory using the M-MDS. • Perform the BCM DTC inspection. (See DTC INSPECTION [BCM].) • Is the same DTC present?	Yes	Replace the BCM. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)
6		No	DTC troubleshooting completed.