Pinpoint Test O: The Autolock Does Not Operate Correctly

Locks, Latches and Entry Systems

Pinpoint Tests

Pinpoint Test O: The Autolock Does Not Operate Correctly

Normal Operation

The Smart Junction Box (SJB) energizes the lock relay based upon input from the ajar switches, the Transmission Range (TR) sensor, and the vehicle speed signal. The SJB locks the doors when the following conditions are met:

- All the doors are closed
- The ignition switch is in the ON position
- The vehicle is shifted into any gear putting the vehicle in motion
- The vehicle attains a speed greater than 20 km/h (12 mph)

NOTE: The autolock feature is not available on vehicles equipped with a manual transmission.

This pinpoint test is intended to diagnose the following:
- Ignition switch
- Door ajar switches
- Vehicle speed signal
- TR sensor
- SJB



PINPOINT TEST O: THE AUTOLOCK DOES NOT OPERATE CORRECTLY

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O1 CHECK THE AUTOLOCKS CONFIGURATION


- Check to see if the autolocks are enabled. REFER to Autolock and Auto-Unlock Programming Autolock and Auto-Unlock Programming.
- Are the autolocks enabled?

Yes
GO to O2.

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

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O2 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 O3.

No
REFER to Courtesy Lamp. Testing and Inspection

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O3 CHECK THE SJB IGNITION STATUS PID


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

Yes
GO to O4.

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

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O4 CHECK THE VEHICLE SPEED OPERATION


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

Yes
GO to O5.

No
REFER to Instrument Panel, Gauges and Warning Indicators.

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O5 CHECK THE TRANSMISSION RANGE SENSOR PID


- Select DRIVE.
- Enter the following diagnostic mode on the scan tool: TCM DataLogger.
- Monitor the Transmission Control Module (TCM) TR sensor PID.
- Does the TCM TR sensor PID display the correct value?

Yes
GO to O6.

No
REFER to Transmission Control Systems to continue diagnosis of the TR sensor. Testing and Inspection

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O6 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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