Left Key Cylinder Switch Fault
Table of contents
B2252 CADILLAC Possible Causes
- Faulty Left Key Cylinder Switch
- Left Key Cylinder Switch harness is open or shorted
- Left Key Cylinder Switch circuit poor electrical connection
- Faulty Driver Door Module (DDM)
How do I fix code B2252 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 B2252 CADILLAC code
The cost of diagnosing the B2252 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)
B2252 CADILLAC Description
The driver or passenger door key switch signal circuits provide input to the Driver Door Module (DDM) or Passenger Door Module (PDM) when the driver or passenger door lock cylinder is rotated to the UNLOCK position. This input allows the door module to detect a door UNLOCK request. The door module provides power and ground to the door key switch. When the door lock cylinder is rotated to the UNLOCK position, a ground is supplied through the door key switch to the signal circuit, which is pulled low. When the DDM detects low voltage on the driver door key switch signal circuit, it sends a message on the serial data line to the PDM to UNLOCK the passenger door. When the PDM detects low voltage on the passenger door key switch signal circuit, it sends a message on the serial data line to the DDM to UNLOCK the driver door. The messages sent on the serial data line are also used by other systems to execute certain functions. The DDM and PDM monitor the signal circuits to determine how long the ground has been applied. If the DDM or PDM detects that the ground is applied for greater than 20 seconds, a Diagnostic Trouble Code (DTC) is set.