Pinpoint Test G: DTC U0140

Parking Aid

Pinpoint Tests

Pinpoint Test G: DTC U0140

Normal Operation

The Parking Aid Module (PAM) receives the ignition switch state from the Smart Junction Box (SJB) as a network message.

- DTC U0140 (Lost Communication With Body Control Module (GEM)) - a continuous and on-demand DTC that sets in the PAM when ignition switch state messages are not received from the SJB.

This pinpoint test is intended to diagnose the following:

- SJB
- Network data fault



PINPOINT TEST G: DTC U0140

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G1 CONFIRM THE DTC WILL SET IN CONTINUOUS MEMORY


- Ignition ON.
- Enter the following diagnostic mode on the scan tool: PAM Continuous DTCs.
- Clear the DTCs. Operate the system and determine if the concern is still present.
- Retrieve continuous PAM DTCs.
- Is DTC U0140 present?

Yes
GO to G2.

No
System is operating normally at this time.

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G2 CHECK THE IGNITION SWITCH VOLTAGE PID


- Enter the following diagnostic mode on the scan tool: PAM DataLogger.
- Check the PAM PID (IGN_V).
- Does the PID match the ignition switch position?

Yes
REFER to Steering Column. Testing and Inspection

No
GO to G3.

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G3 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 determine if 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. CLEAR the DTCs. REPEAT the self-test.

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