Pinpoint Test H: The Smart Lock Does Not Operate Correctly

WARNING: This page is about a different car, the 2009 Mercury Grand Marquis and 2009 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Lighting Control Module for schematic and connector information.

Normal Operation

The lighting control module (LCM) sends a network message to the driver door module (DDM) that the key is in the ignition. The DDM monitors the network message, the door lock control switch and the LH front door ajar switch. If the key is in the ignition and the LH front door is open when the vehicle is locked with a door lock control switch, the DDM unlocks the LH front door. The smart locking feature unlocks the LH front door 1 second after these conditions arise. The smart lock feature is active only if the key code programming and transmitter identification code (TIC) programming modes are not active.

This pinpoint test is intended to diagnose the following:

Key-in-ignition switch
LCM
DDM

PINPOINT TEST H: THE SMART LOCK DOES NOT OPERATE CORRECTLY

NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

H1 CHECK THE KEY-IN-IGNITION SWITCH OPERATION
- Insert the key in the ignition.
- Key in OFF position.
- Open the driver door.
- Does the chime sound?
1. YES : Go to H2.
2. NO : REFER to INSTRUMENT CLUSTER (IC), MESSAGE CENTER, & WARNING CHIMES article.
H2 CHECK THE INTERIOR LIGHTS FOR CORRECT OPERATION
- Open and close the driver and front passenger doors.
- Do the interior lamps operate correctly?
1. YES : Go to H3.
2. NO : REFER to INTERIOR LIGHTING article.
H3 CHECK FOR CORRECT DDM OPERATION
- Disconnect all DDM connectors.
- Check for:
  - corrosion
  - damaged pins
  - pushed-out pins
- Connect all 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. PROGRAM all the remote keyless entry (RKE) transmitters. REFER to Remote Keyless Entry Transmitter Programming . CLEAR the DTCs. REPEAT the self-test.
2. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.