Pinpoint Test AG: DTC U0140:00

Electronic Locking Differential (ELD) System

Pinpoint Test AG: DTC U0140:00

Normal Operation

- DTC U0140:00 (Lost Communication With Body Control Module: No Sub-Type Information)- sets in continuous memory in the TCCM (Transfer Case Control Module) if data messages received from the BCM (Body Control Module) over the HS-CAN (High Speed Controller Area Network) are missing for 5 seconds or longer with ignition in RUN and battery voltage in range. For a complete list of all network messages, refer to Information Bus.

This pinpoint test is intended to diagnose the following:

- BCM (Body Control Module)

- TCCM (Transfer Case Control Module)

PINPOINT TEST AG : DTC U0140:00

AG1 VERIFY THE CUSTOMER CONCERN

- Ignition ON.

- Verify there is an observable symptom present.

Is an observable symptom present?

Yes
GO to AG2.
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.

AG2 CHECK THE COMMUNICATION NETWORK

- Ignition ON.

- Enter the following diagnostic mode on the scan tool: Network Test.

- Carry out the network test.

Does the pass the network test?

Yes
GO to AG3.
No
REFER to Information Bus.

AG3 RETRIEVE THE RECORDED DTCs FROM THE BCM (Body Control Module) SELF-TEST

- Check for recorded DTCs from the BCM (Body Control Module) self-test.

Is DTC U3003:16 or DTC U3003:17 recorded?

Yes
Body Control Systems.
No
GO to AG4.

AG4 RETRIEVE THE RECORDED DTCs FROM THE TCCM (Transfer Case Control Module) SELF-TEST

- Check for recorded DTCs from the TCCM (Transfer Case Control Module) self-test.

Is DTC P0562:00 or P0563:00 recorded?

Yes
GO to Pinpoint Test M Pinpoint Test M: DTC P0562:00 Or P0563:00.
No
GO to AG5.

AG5 RECHECK THE TCCM (Transfer Case Control Module) DTCs
NOTE: If new modules were installed prior to the DTC being set, the module configuration may be incorrectly set during the or the may not have been carried out.

- Clear the DTCs.

- Wait 10 seconds.

- Repeat the TCCM (Transfer Case Control Module) self-test.

Is DTC U0140:00 still present?

Yes
GO to AG6.
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.

AG6 CHECK FOR DTC U0140 OR DTC U0140:00 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- All CMDTCs (Continuous Memory Diagnostic Trouble Codes).

- Retrieve the continuous memory DTCs from all modules.

Is DTC U0140 or U0140:00 set in more than one module?

Yes
INSTALL a new BCM (Body Control Module). TEST the system for normal operation.
No
INSTALL a new TCCM (Transfer Case Control Module). REFER to Transfer Case Control Module (TCCM) . TEST the system for normal operation.