Pinpoint Test A: The Alarm System Does Not Arm/Disarm - From The Driver Door
Anti-Theft
Pinpoint Tests
Pinpoint Test A: The Alarm System Does Not Arm/Disarm - From The Driver Door
Refer to Wiring Diagram Set 117, Remote Keyless Entry and Alarm for schematic and connector information. Diagrams By Number
Normal Operation
On vehicles without the memory feature, the driver door disarm switch provides a ground signal to the Smart Junction Box (SJB) through circuit CPL28 (VT/BN), the switch, and ground circuit GD126 (BK/WH). This allows entry without activating the alarm. The switch must operate before the mechanical lock unlocks. This is to prevent the anti-theft alarm from activating.
On vehicles with the memory feature, the driver door disarm switch provides a ground signal to the Driver Door Module (DDM) through circuit CPL28 (VT/BN), the switch, and ground circuit GD126 (BK/WH). The DDM sends a network message to the SJB, which allows entry without activating the alarm. The switch must operate before the mechanical lock unlocks. This is to prevent the anti-theft alarm from activating.
- DTC B2116 (Door Driver Reset Switch Stuck Failure) - sets when there is a short to ground in the circuit between the door lock actuator and the SJB (vehicles without memory), the DDM (vehicles with memory), or the switch is stuck closed.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Driver door disarm switch (part of the driver door latch)
- DDM (vehicles with memory feature)
- SJB
PINPOINT TEST A: THE ALARM SYSTEM DOES NOT ARM/DISARM - FROM THE DRIVER DOOR
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery.
-------------------------------------------------
A1 CHECK THE DRIVER DOOR DISARM SWITCH INPUT
- Ignition OFF.
- Disconnect: Negative Battery Cable.
- Disconnect: SJB C2280C (Vehicles Without Memory) or DDM C568B (Vehicles With Memory).
- On vehicles without memory, measure the resistance between the SJB C2280C-5, circuit CPL28 (VT/BN), harness side and ground while turning the driver door lock cylinder to UNLOCK, and with the driver door lock cylinder in the AT-REST position.
- On vehicles with memory, measure the resistance between the DDM C568B-2, circuit CPL28 (VT/BN), harness side and ground while turning the driver door lock cylinder to UNLOCK, and with the driver door lock cylinder in the AT-REST position.
- Is the resistance less than 5 ohms with the door lock cylinder in the UNLOCK position and greater than 10,000 ohms with the door lock cylinder in the AT-REST position?
Yes
For vehicles without memory, GO to A6.
For vehicles with memory, GO to A4.
No
GO to A2.
-------------------------------------------------
A2 CHECK CIRCUIT CPL28 (VT/BN) FOR AN OPEN OR A SHORT TO GROUND
- Disconnect: Driver Door Latch C525.
- On vehicles without memory, measure the resistance between the driver door latch C525-5, circuit CPL28 (VT/BN), harness side and the SJB C2280C-5, circuit CPL28 (VT/BN), harness side; and between the driver door latch C525-5, circuit CPL28 (VT/BN), harness side and ground.
- On vehicles with memory, measure the resistance between the driver door latch C525-5, circuit CPL28 (VT/BN), harness side and the DDM C568B-2, circuit CPL28 (VT/BN), harness side; and between the driver door latch C525-5, circuit CPL28 (VT/BN), harness side and ground.
- Is the resistance less than 5 ohms?
Yes
GO to A3.
No
REPAIR the circuit. TEST the system for normal operation.
-------------------------------------------------
A3 CHECK THE DRIVER DOOR DISARM SWITCH GROUND
- Measure the resistance between the driver door latch C525-6, circuit GD126 (BK/WH), harness side and ground.
- Is the resistance less than 5 ohms?
Yes
INSTALL a new driver door latch. REFER to Locks.
No
REPAIR the circuit. TEST the system for normal operation.
-------------------------------------------------
A4 CHECK THE SJB ALARM STATUS PID
- Connect: DDM C568B.
- Connect: Negative Battery Cable.
- Connect the scan tool.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: SJB DataLogger.
- Monitor the SJB PID RESETSW (reset switch) while unlocking the door with the key.
- Does the PID indicate active with the key in the UNLOCK position?
Yes
GO to A6.
No
GO to A5.
-------------------------------------------------
A5 CHECK THE DDM FOR CORRECT OPERATION
- Disconnect all the DDM connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the DDM 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 DDM. REFER to Body Control Systems. INFORM the customer that all memory feature settings have to be reset and the Integrated Keyhead Transmitter (IKT) keys reset to the new memory feature settings. CLEAR the DTCs. REPEAT the self-test.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
-------------------------------------------------
A6 CHECK THE SJB FOR CORRECT OPERATION
- Connect: Negative Battery Cable.
- Disconnect all the SJB connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the SJB 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. REFER to Body Control Systems. CYCLE each key to the ON position for a minimum of 6 seconds to PROGRAM the Remote Keyless Entry (RKE) function of the IKT key. CLEAR the DTCs. REPEAT the self-test. 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. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
-------------------------------------------------