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 [1][2]Diagrams By Number.

NOTE: The intrusion and inclination protection features cannot be activated when locking the vehicle with the door lock cylinder. This allows raising the vehicle on a hoist, transporting or towing the vehicle, or when authorized motion inside the vehicle is likely.

Normal Operation

The Smart Junction Box (SJB) 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 signalling the SJB (Smart Junction Box) to arm the alarm. When a key in the door lock cylinder is turned to the unlock position it grounds the reset circuit signalling the SJB (Smart Junction Box) to disarm the alarm. The driver door latch has a dedicated ground circuit that is used for the door ajar and set/reset switches.

- DTC B2100 (Door Driver Key Cylinder Switch Failure)- an on-demand that sets when the SJB (Smart Junction Box) 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 disarm switch (part of the door latch)

- SJB (Smart Junction Box)

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 SJB (Smart Junction Box) DTCs FROM THE SELF-TEST

- Check the recorded results from the SJB (Smart Junction Box) self-test.

Is DTC B2100 present?

Yes
GO to A2.

No
GO to A4.

A2 CHECK THE DRIVER DOOR LATCH FOR A SHORT TO GROUND

- Disconnect: Driver Door Latch C501.

- Clear the SJB (Smart Junction Box) DTCs.

- Repeat the SJB (Smart Junction Box) self-test.

Is DTC B2100 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: SJB (Smart Junction Box) C2280C.

- Measure the resistance between the driver door latch C501-1, circuit CRT19 (GN/VT), harness side and ground, and between the driver door latch C501-2, circuit CPL29 (YE/GY), 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 C501.

- Enter the following diagnostic mode on the scan tool: SJB (Smart Junction Box) DataLogger.

- Monitor the SJB (Smart Junction Box) PID (D_KCS) while connecting and disconnecting a fused jumper wire between the driver door latch C501-1, circuit CRT19 (GN/VT), harness side and ground, and between the driver door latch C501-2, circuit CPL29 (YE/GY), harness side and ground.





Does the PID indicate LOCKED and UNLOCKED 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: SJB (Smart Junction Box) C2280C.

- Measure the resistance between the driver door latch, harness side and the SJB (Smart Junction Box) , harness side as follows:

Driver Door Latch Connector-Pin Circuit SJB (Smart Junction Box) Connector-Pin C501-1 CRT19 (GN/VT) C2280C-8 C501-2 CPL29 (YE/GY) C2280C-9






Are the resistances 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 SJB (Smart Junction Box) OPERATION

- Disconnect all the SJB (Smart Junction Box) connectors.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect all the SJB (Smart Junction Box) 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 SJB (Smart Junction Box). 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.