Pinpoint Tests AN: DTC U0101:00

Instrumentation, Message Center and Warning Chimes

Pinpoint Test AN: DTC U0101:00

Normal Operation
- DTC U0101:00 (Lost Communication With TCM: No Sub Type Information) - sets in continuous memory in the Instrument Panel Cluster (IPC) if data messages received from the Transmission Control Module (TCM) over the High Speed Controller Area Network (HS-CAN) are missing for 5 seconds or more.

This pinpoint test is intended to diagnose the following:

- TCM
- IPC

PINPOINT TEST AN: DTC U0101:00

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AN1 VERIFY THE CUSTOMER CONCERN

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

Yes
GO to AN2.

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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AN2 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 module pass the network test?

Yes
GO to AN3.

No
REFER to Module Communications Network Testing and Inspection.

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AN3 RETRIEVE THE RECORDED DTCs FROM THE IPC SELF-TEST

- Check for recorded IPC DTCs from the self-test.
- Is DTC U3006:16 or DTC U3006:17 recorded?

Yes
For DTC U3006:16, GO to Pinpoint Test AU. For DTC U3006:17, GO to Pinpoint Test AV. Pinpoint Tests AU: DTC U3006:16 Pinpoint Tests AV: DTC U3006:17

No
GO to AN4.

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AN4 RECHECK THE IPC 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 may not have been carried out.

- Clear the DTCs.
- Wait 10 seconds.
- Repeat the IPC self-test.
- Is DTC U0101:00 still present?

Yes
GO to AN5.

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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AN5 CHECK FOR DTC U0101:00 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.
- Retrieve the continuous memory DTCs from all modules.
- Is DTC U0101:00 set in the ABS module?

Yes
INSTALL a new TCM. REFER to Automatic Shifting Manual Transmission/Transaxle Transmission Control Module (TCM). CLEAR the DTCs. REPEAT the self-test.

No
INSTALL a new IPC. REFER to Instrument Panel Cluster (IPC) Service and Repair. TEST the system for normal operation.

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