Pinpoint Test M: The Auto-Unlock Does Not Operate Correctly

Handles, Locks, Latches and Entry Systems

Pinpoint Test M: The Auto-Unlock Does Not Operate Correctly

Normal Operation

The Body Control Module (BCM) energizes the unlock relay based on input from the door ajar switches and the vehicle speed signal. The BCM (Body Control Module) unlocks the doors when the following conditions are met:

- The vehicle speed has exceeded 20 km/h (12 mph) then dropped to 0 km/h (0 mph)

- The key is turned to the OFF or ACC position

- The LH front door is opened within 10 minutes of the key being turned to the OFF or ACC position

The auto-unlock feature is cancelled if the doors are locked with the door lock control switch or the Integrated Keyhead Transmitter (IKT) within the 10-minute active window. After the 10-minute active window expires, the auto-unlock feature does not unlock the doors if the driver door is opened.

This pinpoint test is intended to diagnose the following:

- Door ajar switch input

- Vehicle speed signal message

- BCM (Body Control Module)

PINPOINT TEST M : THE AUTO-UNLOCK DOES NOT OPERATE CORRECTLY

M1 VERIFY THE AUTO-UNLOCK FEATURE IS ENABLED

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

Is the auto-unlock feature enabled?

Yes
GO to M2.

No
ENABLE the auto-unlock feature. REFER to Autolock and Auto-Unlock Programming .

M2 CHECK THE COURTESY LAMP OPERATION

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

Do the courtesy lamps operate correctly?

Yes
GO to M3.

No
REFER to Lighting and Horns.

M3 CHECK THE VEHICLE SPEED OPERATION

- Check the operation of the speedometer.

Does the speedometer operate correctly?

Yes
GO to M4.

No
REFER to Instrument Panel, Gauges and Warning Indicators.

M4 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.