Pinpoint Test I: DTC U0140

Parking Aid - Expedition

Pinpoint Tests

Pinpoint Test I: DTC U0140

Normal Operation

The Parking Aid Module (PAM) receives network messages from the Smart Junction Box (SJB) via the Medium Speed Controller Area Network (MS-CAN). As more than one module receives each of the SJB messages, all modules receiving that particular message should exhibit a symptom if the message is missing.

- DTC U0140 (Lost Communication With Body Control Module (GEM)) - sets in the PAM if data messages received from the SJB over the Medium Speed Controller Area Network (MS-CAN) are missing for greater than 5 seconds with the ignition in RUN.

This pinpoint test is intended to diagnose the following:

- Communication network concern
- PAM
- SJB



PINPOINT TEST I: DTC U0140

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I1 CHECK FOR LOST COMMUNICATION DTCs


- Ignition ON.
- Clear continuous DTCs from all modules.
- Ignition OFF.
- Wait at least 10 seconds.
- Retrieve all continuous DTCs from all modules.
- Is DTC U0140 set in the PAM?

Yes
GO to I2.

No
The system is operating normally at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

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I2 CHECK FOR BATTERY VOLTAGE OUT-OF-RANGE DTCs


- Carry out the self-test for the PAM and SJB.
- Is DTC B1317 or DTC B1318 recorded in any module?

Yes
For a parking aid system concern, REFER to DTC Charts. Parking Aid

For the SJB, REFER to Body Control Systems.

No
GO to I3.

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I3 CHECK FOR DTC U0140 OR DTC U0140:00 SET IN MULTIPLE MODULES


- Review the recorded results from the self-test.
- Is DTC U0140 or DTC U0140:00 set in more than one module?

Yes
If there is an observable symptom, GO to Symptom Chart to diagnose the observed symptom. Parking Aid

If there is no observable symptom, DISREGARD the DTC.

No
GO to I4.

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I4 CHECK FOR CORRECT SJB OPERATION


- Ignition OFF.
- Disconnect the SJB connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the SJB connector and make sure it seats 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. CLEAR all continuous DTCs. REPEAT the self-test.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR all continuous DTCs. REPEAT the self-test.

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