Pinpoint Test K: The Autolock Does Not Operate Correctly

Handles, Locks, Latches and Entry Systems

Pinpoint Test K: The Autolock Does Not Operate Correctly

Refer to Wiring Diagram Set 117, Remote Keyless Entry and Alarm for schematic and connector information [1][2]Diagrams By Number.

Normal Operation

The Smart Junction Box (SJB) energizes the lock relay based on input from the ajar switches, the ignition switch, the Transmission Range (TR) sensor and the vehicle speed signal. The SJB (Smart Junction Box) locks the doors when the following conditions are met:

- All the doors are closed

- The ignition switch is in the ON position

- The vehicle is shifted into any gear putting the vehicle in motion

- The vehicle attains a speed greater than 20 km/h (12 mph)

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Programming

- Door ajar switches

- Vehicle speed signal input from the Instrument Panel Cluster (IPC)

- SJB (Smart Junction Box)

PINPOINT TEST K : THE AUTOLOCK DOES NOT OPERATE CORRECTLY

K1 VERIFY THE AUTOLOCK FEATURE IS ENABLED

- Verify the autolock feature is enabled. Refer to Autolock and Auto-Unlock Programming .

Is the autolock feature enabled?

Yes
GO to K2.

No
PROGRAM the autolock feature. REFER to Autolock and Auto-Unlock Programming .

K2 CHECK THE COURTESY LAMP OPERATION

- Open and close the doors while checking the courtesy lamp operation.

Do the courtesy lamps operate correctly?

Yes
GO to K3.

No
REFER to Lighting and Horns.

K3 CHECK THE SJB (Smart Junction Box) PID (IGN_R_ECU)

- Ignition ON.

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

- Monitor the SJB (Smart Junction Box) PID (IGN_R_ECU).

Does the PID indicate RUN?

Yes
GO to K4.

No
REFER to Steering Column.

K4 RETRIEVE THE RECORDED SJB (Smart Junction Box) DTCs FROM THE SELF-TEST

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

Is DTC U0155 recorded?

Yes
REFER to Body Control Systems, Diagnosis and Testing, Smart Junction Box (SJB).

No
GO to K5.

K5 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.