Pinpoint Test N: The Smart Unlock Does Not Operate Correctly

Locks, Latches and Entry Systems





Pinpoint Test N: The Smart Unlock Does Not Operate Correctly

Normal Operation

The Lighting Control Module (LCM) sends a network message to the Driver Door Module (DDM) that the key is in the ignition. If the DDM does not receive or receives invalid data for the key-in ignition from the LCM, it will set DTC U1135. The DDM monitors the network message, the door lock control switch and the driver door ajar switch. If the key is in the ignition and the driver door is open when the vehicle is locked with a door lock control switch, the DDM unlocks the driver door. The smart unlocking feature unlocks the LH front door one second after these conditions are met. The vehicle may still be locked with the key in the ignition using the manual lock button, a Remote Keyless Entry (RKE) transmitter, the keyless entry keypad or a key in the driver door lock cylinder.

This pinpoint test is intended to diagnose the following:

- Driver door ajar switch
- Key-in-ignition switch
- LCM
- DDM



PINPOINT TEST N: THE SMART UNLOCK DOES NOT OPERATE CORRECTLY

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N1 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 N2.

No
REFER to Courtesy Lamp. Testing and Inspection

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N2 CHECK THE KEY-IN-IGNITION SWITCH OPERATION


- Insert the key in the ignition lock cylinder.
- Ignition OFF.
- Open the driver door.
- Does the chime sound?

Yes
GO to N3.

No
REFER to Instrument Panel, Gauges and Warning Indicators to continue diagnosis of the key-in-ignition warning system.

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N3 RETRIEVE THE RECORDED DDM DTCs FROM THE SELF-TEST


- Check the recorded results from the DDM self-test.
- Is continuous DTC U1135 retrieved?

Yes
GO to N4.

No
GO to N5.

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N4 CHECK FOR CORRECT LCM OPERATION


- Disconnect all the LCM connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the LCM 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 LCM. 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.

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N5 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?

Yes
INSTALL a new DDM. 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.

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