Pinpoint Test AW: DTC U0101

Instrumentation, Message Center and Warning Chimes

Pinpoint Test AW: DTC U0101

Normal Operation

- DTC U0101 (Lost Communication With TCM (Transmission Control Module))- sets in continuous memory in the Instrument Cluster (IC) if data messages received from the Transmission Control Module (TCM) over the High Speed Controller Area Network (HS-CAN) are missing. For a complete list of all network messages, refer to Information Bus.

This pinpoint test is intended to diagnose the following:

- TCM (Transmission Control Module)

- IC (Instrument Cluster)

PINPOINT TEST AW : DTC U0101

AW1 VERIFY THE CUSTOMER CONCERN

- Ignition ON.

- Verify that there is an observable symptom present.

Is an observable symptom present?

Yes
GO to AW2.

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.

AW2 CHECK THE COMMUNICATION NETWORK

- Ignition ON.

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

- Carry out the network test.

Does the TCM (Transmission Control Module) pass the network test?

Yes
GO to AW3.

No
REFER to Information Bus.

AW3 RETRIEVE THE RECORDED DTCs FROM THE IC (Instrument Cluster) SELF-TEST

- Check for recorded IC (Instrument Cluster) DTCs from the self-test.

Is DTC B1317 or DTC B1318 recorded?

Yes
GO to Pinpoint Test AS Pinpoint Test AS: DTC B1317 (B1317) or GO to Pinpoint Test AT Pinpoint Test AT: DTC B1318 (B1318).

No
GO to AW4.

AW4 RECHECK THE IC (Instrument Cluster) DTCs

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

- Clear the DTCs. Repeat the IC (Instrument Cluster) self-test.

Is DTC U0101 still present?

Yes
GO to AW5.

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.

AW5 CHECK FOR DTC U0101 SET IN OTHER MODULES

- Ignition ON.

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

- Retrieve the continuous memory DTCs from all modules.

Is DTC U0101 set in the Battery Control Module - High Voltage Traction Battery (BCM-HVTB) module?

Yes
INSTALL a new TCM (Transmission Control Module). CLEAR the DTCs. REPEAT the self-test.

No
INSTALL a new IC (Instrument Cluster). REFER to Instrument Cluster (IC) . TEST the system for normal operation.