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

Handles, Locks, Latches and Entry Systems





Pinpoint Tests

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

Normal Operation

The Smart Junction Box (SJB) energizes the unlock relay based upon input from the ajar switches and the vehicle speed signal. The SJB unlocks the doors when the following conditions are met:

- The vehicle speed has exceeded 20 km/h (12 mph) then dropped to 0 km/h (0 mph) (vehicle stopped).
- The key is turned to the OFF or ACCY position.
- The LH front door is opened within 10 minutes of the key being turned to the OFF or ACCY position.

This pinpoint test is intended to diagnose the following:

- Door ajar switches
- Ignition switch
- Vehicle speed signal
- SJB



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

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P1 CHECK THE AUTO-UNLOCK CONFIGURATION


- Check if the auto-unlock is enabled. Refer to Autolock and Auto-Unlock Programming Autolock and Auto-Unlock Programming.
- Is auto-unlock enabled?

Yes
GO to P2.

No
ENABLE auto-unlock. REFER to Autolock and Auto-Unlock Programming Autolock and Auto-Unlock Programming. TEST the system for normal operation.

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P2 CHECK THE COURTESY LAMP OPERATION


- Open and close each door while observing the courtesy lamp operation.
- Do the courtesy lamps operate correctly?

Yes
GO to P3.

No
REFER to Lighting and Horns.

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P3 CHECK THE SJB IGNITION STATUS PID


- Ignition ON.
- Enter the following diagnostic mode on the scan tool: SJB DataLogger .
- Monitor the SJB PID (IGN_R_ECU).
- Does the ignition status PID indicate ON?

Yes
GO to P4.

No
REFER to Steering Column to continue diagnosis of the ignition switch.

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P4 CHECK THE VEHICLE SPEED OPERATION


- Check the operation of the speedometer.
- Does the speedometer operate correctly?

Yes
GO to P5.

No
REFER to Instrument Panel, Gauges and Warning Indicators.

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P5 CHECK FOR CORRECT SJB OPERATION


- Disconnect all the SJB connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the SJB 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 SJB. REFER to Body Control Systems. 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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