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

Normal Operation 

The driver door module (DDM) energizes the unlock relay based on input from the door ajar switches and the vehicle speed signal. The DDM unlocks the doors when the following conditions are met:

• The vehicle speed has exceeded 5 km/h (3 mph) then dropped to 0 km/h (0 mph) (vehicle stopped).
• 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 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 cluster (IC) sends the vehicle speed signal over the standard corporate protocol (SCP) network to the DDM. If the DDM does not receive the vehicle speed signal or it is invalid, the DDM will set DTC U1041.

This pinpoint test is intended to diagnose the following:

• Door ajar switch input
• Vehicle speed signal message
• DDM

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

1. N1 VERIFY THE AUTO-UNLOCK FEATURE IS ENABLED 
   • Verify the auto-unlock feature is enabled. Refer to Autolock and Horn Chirp Programming .
   • Is the auto-unlock feature enabled? 
   1. YES  : Go to  N2.
   2. NO  : ENABLE the auto-unlock feature. REFER to Autolock and Horn Chirp Programming .
2. N2 CHECK THE COURTESY LAMP OPERATION 
   • Open and close the doors while observing the courtesy lamp operation.
   • Do the courtesy lamps operate correctly? 
   1. YES  : Go to  N3.
   2. NO  : REFER to INTERIOR LIGHTING article.
3. N3 RETRIEVE THE RECORDED DDM DTCs FROM THE SELF-TEST 
   • Check the recorded results from the DDM self-test.
   • Is continuous DTC U1041 retrieved? 
   1. YES  : REFER to INSTRUMENTATION, MESSAGE CENTER, & WARNING CHIMES article to diagnose the speedometer.
   2. NO  : Go to  N4.
4. N4 CHECK FOR CORRECT DDM 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? 
   1. YES  : INSTALL a new DDM. REFER to MULTIFUNCTION ELECTRONIC MODULES article. TEST the system for normal operation.
   2. NO  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.