Pinpoint Test L: The Autolock Does Not Operate Correctly

Normal Operation 

The autolocking function automatically locks all doors when all of the following conditions are concurrently met during the current key cycle:

• All the doors are closed.
• The autolocking function is active.
• The ignition switch is in the RUN position.
• The transmission is in a forward gear.
• The vehicle speed exceeds 5 km/h (3 mph).

After the initial activation of autolocking and at least one door has been opened, autolocking is activated again if the following conditions are concurrently met:

• All the doors are closed.
• The ignition switch is in the RUN position.
• The transmission is in a forward gear.
• The vehicle speed exceeds 5 km/h (3 mph).

The driver door module (DDM) receives inputs from the ignition switch position, digital transmission range (TR) sensor, and the vehicle speed over the standard corporate protocol (SCP) network. If the DDM does not receive or receives invalid data for vehicle speed from the instrument cluster (IC), it will set DTC U1041. If the DDM does not receive or receives invalid data for the TR sensor from the IC, it will set DTC U1059. The DDM also receives input from the door ajar switches, which are hardwired to the DDM.

This pinpoint test is intended to diagnose the following:

• Door ajar switch input
• Vehicle speed signal message from the IC
• TR sensor message from the IC
• DDM

PINPOINT TEST L: THE AUTOLOCK DOES NOT OPERATE CORRECTLY 

1. L1 VERIFY THE AUTOLOCK FEATURE IS ENABLED 
   • Verify the autolock feature is enabled. Refer to Autolock and Horn Chirp Programming .
   • Is the autolock feature enabled? 
   1. YES  : Go to  L2
   2. NO  : ENABLE the autolock feature. REFER to Autolock and Horn Chirp Programming .
2. L2 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  L3.
   2. NO  : REFER to INTERIOR LIGHTING article.
3. L3 RETRIEVE THE RECORDED DDM DTCs FROM THE SELF-TEST 
   • Check the recorded results from the DDM self-test.
   • Is continuous DTC U1041 or U1059 retrieved? 
   1. YES  : For DTC U1041, REFER to INSTRUMENTATION, MESSAGE CENTER, & WARNING CHIMES article to diagnose the speedometer.

      For DTC U1059, REFER to the Introduction - Gasoline Engines article to diagnose the digital TR sensor.

      For all other DDM DTCs, REFER to DTC Charts .

   2. NO  : Go to  L4.
4. L4 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.