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

Handles, Locks, Latches and Entry Systems

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

Normal Operation

The Smart Junction Box (SJB) energizes the unlock relay based on input from the door ajar switches and the vehicle speed signal. The SJB (Smart Junction Box) 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 driver 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 Remote Keyless Entry (RKE) transmitter 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.

The Instrument Panel Cluster (IPC) sends the vehicle speed signal over the Medium Speed Controller Area Network (MS-CAN) to the SJB (Smart Junction Box).

This pinpoint test is intended to diagnose the following:

- Door ajar switch input

- Vehicle speed signal message

- SJB (Smart Junction Box)

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

L1 VERIFY THE AUTO-UNLOCK FEATURE IS ENABLED

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

Is the auto-unlock feature enabled?

Yes
GO to L2.

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

L2 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 L3.

No
REFER to Lighting and Horns.

L3 CHECK THE VEHICLE SPEED OPERATION

- Check the operation of the speedometer.

Does the speedometer operate correctly?

Yes
GO to L4.

No
REFER to Instrument Panel, Gauges and Warning Indicators.

L4 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.