Passenger Door Lock Switch Circuit
Table of contents
B3155 CADILLAC Possible Causes
- Faulty Passenger Door Lock Switch
- Passenger Door Lock Switch harness is open or shorted
- Passenger Door Lock Switch circuit poor electrical connection
- Faulty Body Control Module (BCM)
How do I fix code B3155 CADILLAC?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the B3155 CADILLAC code
The cost of diagnosing the B3155 CADILLAC code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
B3155 CADILLAC Description
The Body Control Module (BCM) monitors the voltage level of the door lock and door unlock signal circuits. When the driver door lock switch is in the open position, the voltage level in the signal circuit will be near 12 V. When the driver door lock switch is pressed to the lock or unlock position, the voltage level in the appropriate signal circuit will drop to 0 V and the BCM will detect the voltage drop and command the door latches to perform the requested lock or unlock command.