Pinpoint Test D: DTC U0140

Driver Seat Module (DSM)

Pinpoint Tests

Pinpoint Test D: DTC U0140

Normal Operation
- DTC U0140 (Lost Communication With Body Control Module (GEM)) - set by the Driver Seat Module (DSM) whenever it receives invalid data from the Smart Junction Box (SJB).

This pinpoint test is intended to diagnose the following:


- Module communication
- DSM
- SJB



PINPOINT TEST D: DTC U0140

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D1 VERIFY CUSTOMER CONCERN


- Ignition ON.
- Verify that there is an observable symptom present.
- Is an observable symptom present?

Yes
GO to D2.

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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D2 CHECK THE COMMUNICATION NETWORK


- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Network Test.
- Carry out the network test.
- Does the SJB pass the network test?

Yes
GO to D3.

No
REFER to Information Bus.

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D3 RETRIEVE THE RECORDED DTCs FROM THE SELF-TEST


- Check for recorded DSM DTCs from the self-test.
- Is DTC B1317 or B1318 recorded?

Yes
For DTC B1317, Go To Pinpoint Test b. Pinpoint Test B: DTC B1317

For DTC B1318, Go To Pinpoint Test c. Pinpoint Test C: DTC B1318

No
GO to D4.

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D4 RECHECK THE DSM DTCs


NOTE: If new modules were installed prior to the DTC being set, the module configuration may be incorrectly set during Programmable Module Installation (PMI) or the PMI may not have been carried out.

- Clear the DTCs. Repeat the DSM self-test.
- Is DTC U0140 still present?

Yes
GO to D5.

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

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D5 CHECK FOR DTC U0140 SET IN OTHER MODULES


- Clear all DTCs.
- Ignition OFF.
- Ignition ON.
- Wait 10 seconds.
- Enter the following diagnostic mode on the scan tool: Self-Test.
- Retrieve the continuous memory DTCs from all modules.
- Is DTC U0140 set in the Audio Control Module (ACM), DSM, audio Digital Signal Processing (DSP) module or Parking Aid Module (PAM)?

Yes
INSTALL a new SJB. REFER to Smart Junction Box (SJB) Service and Repair.

No
INSTALL a new DSM. REFER to Driver Seat Module (DSM) Service and Repair.

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