Pinpoint Test N: The Smart Unlock Is Inoperative

Handles, Locks, Latches and Entry Systems

Pinpoint Test N: The Smart Unlock Is Inoperative

Normal Operation

For vehicles without Intelligent Access (IA), when the key is in the ignition lock cylinder and the door lock control switch is pressed to lock the doors with any door ajar the Body Control Module (BCM) automatically unlocks all the doors. This feature helps prevent the keys from being locked in the vehicle by unlocking the doors if the key is in the ignition and either front door is ajar.

NOTE: For vehicles with IA, the smart unlock feature is only available on late build vehicles.

For vehicles with IA, the Remote Function Actuator (RFA) module sends a message over the Medium Speed Controller Area Network (MS-CAN) to the BCM to command all doors to unlock to prevent an IA key from being inadvertently locked inside the vehicle. When the vehicle is locked using the door lock control switch with the door ajar and then closed, the RFA module searches the interior of the vehicle for an IA key. The RFA module searches the interior of the vehicle by activating all 3 low frequency passive start antennas. If an IA key is inside the vehicle the signal from the passive start antennas activate the IA key, and it sends a signal back to the RFA module through the Remote Functions Receiver (RFR) module. If the RFA module detects there is an IA key inside the vehicle, it sends a command to the BCM to unlock all of the doors.

The vehicle can still be locked with the key in the ignition (vehicles without IA) or a key inside the vehicle (vehicles with IA), a key in the door lock cylinder, or the lock button on another Remote Keyless Entry (RKE) transmitter.

This pinpoint test is intended to diagnose the following:

- Key-in-ignition switch (vehicles without IA)
- Door ajar switch input
- IA key

PINPOINT TEST N: THE SMART UNLOCK DOES NOT OPERATE CORRECTLY

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N1 CHECK THE DOOR LOCK OPERATION

- Check the operation of the door locks from the door lock control switch.
- Do all of the doors lock and unlock?

Yes
GO to N2.

No
IDENTIFY the correct symptom and GO to Symptom Chart - Electrical. Symptom Related Diagnostic Procedures

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N2 CHECK THE COURTESY LAMP OPERATION

- Open and close the left and right front doors while checking the courtesy lamp operation.
- Do the courtesy lamps operate correctly?

Yes
For vehicles without IA, REFER to Instrumentation, Message Center, and Warning Chimes Testing and Inspection to DIAGNOSE the key-in-ignition warning chime.

For vehicles with IA, REFER to Anti-Theft - Passive Anti-Theft System (PATS) Testing and Inspection to DIAGNOSE the IA key and passive start antennas.

No
REFER to Interior Lighting Testing and Inspection to DIAGNOSE the door ajar inputs.

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