Pinpoint Test M: The Autolock Does Not Operate Correctly

Locks, Latches and Entry Systems







Pinpoint Tests

Pinpoint Test M: The Autolock Does Not Operate Correctly

Normal Operation

When autolock is enabled the SJB requires the following inputs:

- Transmission Range (TR) sensor
- Door ajar switches (all doors closed)
- Ignition switch position
- Vehicle speed

The vehicle speed and TR sensor inputs are received through the Controller Area Network (CAN). Once the SJB receives all 4 inputs, the doors automatically lock.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors
- Door ajar switches
- Ignition switch
- Vehicle speed signal
- SJB



PINPOINT TEST M: THE AUTOLOCK DOES NOT OPERATE CORRECTLY

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M1 VERIFY THE AUTOLOCK FEATURE IS ENABLED


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

Yes
GO to M2.

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

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M2 CHECK THE COURTESY LAMP OPERATION


- Open and close each door, liftgate and liftgate window glass while checking the courtesy lamp operation.
- Do the courtesy lamps operate correctly?

Yes
GO to M3.

No
Refer to Courtesy Lamp. Testing and Inspection

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M3 CHECK THE SJB PIDs


- Ignition ON.
- Enter the following diagnostic mode on the scan tool: SJB DataLogger.
- Monitor the SJB transmission gear selected PID (TRANSGEAR).
- Monitor the SJB ignition switch status PID (GEM-IGN).
- Monitor the SJB vehicle speed PID (VSS_GEM).
- Are the correct values received?

Yes
GO to M4.

No
To diagnose an incorrect vehicle speed PID, REFER to Antilock Brakes / Traction Control Systems. Testing and Inspection

To diagnose an incorrect transmission gear selected PID, REFER to Transmission Control Systems. Testing and Inspection

To diagnose an incorrect ignition switch status PID, REFER to Steering Column. Testing and Inspection

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M4 CHECK FOR CORRECT SJB OPERATION


- 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. 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.

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