Pinpoint Tests AW: DTC U0101:00

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests

Pinpoint Test AW: DTC U0101:00

Normal Operation
- DTC U0101:00 (Lost Communication With TCM: No Sub-Type Information) - sets in the
Instrument Panel Cluster (IPC) if data messages received from the TCM over the
High Speed Controller Area Network (HS-CAN) are missing for greater than 5 seconds. For a complete list of all network messages, refer to Information Bus.

This pinpoint test is intended to diagnose the following:

- TCM
- IPC



PINPOINT TEST AW: DTC U0101:00

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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.

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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 pass the network test?

Yes
GO to AW3.

No
REFER to Information Bus.

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AW3 RETRIEVE THE RECORDED DTCs FROM THE IPC SELF-TEST


- Check for recorded DTCs from the IPC self-test.
- Is DTC U3003:16 or DTC U3003:17 recorded?

Yes
GO to Pinpoint Test BD (U3003:16) or GO to Pinpoint Test BE (U3003:17). Pinpoint Tests BD: DTC U3003:16 Pinpoint Tests BE: DTC U3003:17

No
GO to AW4.

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AW4 RECHECK THE IPC DTCs


- Clear the DTCs. Repeat the IPC self-test.
- Is DTC U0101:00 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.

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AW5 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 set in the PCM?

Yes
INSTALL a new PCM. REFER to Computers and Control Systems. CLEAR the DTCs. REPEAT the self-test.

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

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