#
DTC B1873

id0902j0832200

DTC B1873 | Turn signal/hazard power feed circuit short to ground
--- | ---
DETECTION CONDITION | Short to GND in wiring harness between BCM and hazard warning switch
POSSIBLE CAUSE | • Short to GND in wiring harness between BCM terminal 4G and hazard warning switch terminal 1X • Hazard warning switch malfunction • BCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | INSPECT HAZARD WARNING SWITCH CONNECTOR • Disconnect the hazard warning switch connector. • Inspect the hazard warning 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 HAZARD WARNING SWITCH SIGNAL CIRCUIT FOR SHORT TO GND • Inspect for continuity between BCM terminal 4G (wiring harness-side) and 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 HAZARD WARNING SWITCH • Inspect the hazard warning switch. (See HAZARD WARNING SWITCH INSPECTION.) • Is there any malfunction? | Yes | Replace the hazard warning switch, then go to the next step. (See CENTER PANEL MODULE DISASSEMBLY/ASSEMBLY.)
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.