Pinpoint Test A: The Alarm System Does Not Arm/Disarm From The Driver Door Lock Cylinder

Anti-Theft

Pinpoint Test A: The Alarm System Does Not Arm/Disarm From The Driver Door Lock Cylinder

Refer to Wiring Diagram Set 117, Remote Keyless Entry and Alarm for schematic and connector information Electrical Diagrams.

Normal Operation

The Body Control Module (BCM) monitors the driver door lock through the set/reset switch (part of the driver door latch) and the set and reset input circuits. When a key in the door lock cylinder is turned to the LOCK position it grounds the set circuit signaling the BCM (Body Control Module) to arm the alarm. When a key in the door lock cylinder is turned to the UNLOCK position it grounds the reset circuit signaling the BCM (Body Control Module) to disarm the alarm. The driver door latch uses a dedicated ground circuit for the door ajar and set/reset switches.

- B10B1:92 (Cabin Set/Reset Switch: Performance or Incorrect Operation)- a continuous and on-demand DTC that sets when the BCM (Body Control Module) detects a short to ground on the driver door lock cylinder set or reset input circuits.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Door set/reset switch (part of the driver door latch)

- BCM (Body Control Module)

PINPOINT TEST A : THE ALARM SYSTEM DOES NOT ARM/DISARM FROM THE DRIVER DOOR LOCK CYLINDER

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

A1 CHECK THE RECORDED BCM (Body Control Module) DTCs FROM THE SELF-TEST

- Check the recorded results from the BCM (Body Control Module) self-test.

Is DTC B10B1:92 present?

Yes
GO to A2.

No
GO to A4.

A2 CHECK THE DRIVER DOOR LATCH FOR A SHORT TO GROUND

- Disconnect: Driver Door Latch C525.

- Clear the BCM (Body Control Module) DTCs.

- Repeat the BCM (Body Control Module) self-test.

Is DTC B10B1:92 still present?

Yes
GO to A3.

No
INSTALL a new driver door latch. TEST the system for normal operation.

A3 CHECK THE SET/RESET CIRCUITS FOR A SHORT TO GROUND

- Ignition OFF.

- Disconnect: BCM (Body Control Module) C2280G.

- Measure the resistance between the BCM (Body Control Module) C2280G-6, circuit CPL29 (YE/GY), harness side and ground, and between the BCM (Body Control Module) C2280G-19, circuit CPL28 (VT/BN), harness side and ground





Are the resistances greater than 10,000 ohms?

Yes
GO to A7.

No
REPAIR the circuit in question for a short to ground. CLEAR the DTCs. TEST the system for normal operation.

A4 CHECK THE COURTESY LAMP OPERATION

- Open and close the driver door while checking the courtesy lamp operation.

Do the courtesy lamps operate correctly?

Yes
GO to A5.

No
REFER to Lighting and Horns to diagnose the driver door ajar input concern.

A5 CHECK THE DRIVER DOOR LATCH

- Disconnect: Driver Door Latch C525.

- Enter the following diagnostic mode on the scan tool: BCM (Body Control Module) DataLogger.

- Monitor the BCM (Body Control Module) PID (KCS_DRVR) while connecting and disconnecting a fused jumper wire between the driver door latch C525-1 CPL29 (YE/GY), harness side and ground, and between the driver door latch C525-2 CPL28 (VT/BN), harness side and ground





Does the PID indicate LOCK and UNLOCK when the jumper wire is connected?

Yes
INSTALL a new driver door latch. TEST the system for normal operation.

No
GO to A6.

A6 CHECK THE SET/RESET CIRCUITS FOR AN OPEN

- Ignition OFF.

- Disconnect: BCM (Body Control Module) C2280G.

- If the PID did not indicate UNLOCK, measure the resistance between the BCM (Body Control Module) C2280G-19, circuit CPL28 (VT/BN), harness side and the driver door latch C525-2, circuit CPL28 (VT/BN), harness side.





- If the PID did not indicate LOCK, measure the resistance between the BCM (Body Control Module) C2280G-6, circuit CPL29 (YE/GY), harness side and the driver door latch C525-1, circuit CPL29 (YE/GY), harness side.





Is the resistance less than 5 ohms?

Yes
GO to A7.

No
REPAIR the circuit in question for an open. TEST the system for normal operation.

A7 CHECK FOR CORRECT BCM (Body Control Module) OPERATION

- Disconnect all the BCM (Body Control Module) connectors.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect all the BCM (Body Control Module) connectors and make sure they seat correctly.

- Operate the system and verify the concern is still present.

Is the concern still present?

Yes
INSTALL a new BCM (Body Control Module). TEST the system for normal operation.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.