Pinpoint Tests AU: DTC U0102:00

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests

Pinpoint Test AU: DTC U0102:00

Normal Operation
- DTC U0102:00 (Lost Communication With Transfer Case Control Module: No Sub-Type Information) - sets in continuous memory in the Instrument Panel Cluster (IPC) if data messages received from the Transfer Case Control Module (TCCM) over the High Speed Controller Area Network (HS-CAN) are missing for 5 seconds or longer. For a complete list of all network messages, refer to Module Communications Network Testing and Inspection.

This pinpoint test is intended to diagnose the following:

- TCCM
- IPC

PINPOINT TEST AU: DTC U0102:00

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AU1 VERIFY THE CUSTOMER CONCERN

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

Yes
GO to AU2.

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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AU2 CHECK THE COMMUNICATION NETWORK

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

Yes
GO to AU3.

No
REFER to Module Communications Network Testing and Inspection.

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AU3 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
For DTC U3003:16, GO to Pinpoint Test BD Pinpoint Tests BD: DTC U3003:16. For DTC U3003:17, GO to Pinpoint Test BE Pinpoint Tests BE: DTC U3003:17.

No
GO to AU4.

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AU4 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 U0102:00 still present?

Yes
GO to AU5.

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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AU5 CHECK FOR DTC U0102:00 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 U0102:00 set in the ABS module?

Yes
INSTALL a new TCCM. REFER to Four Wheel Drive (4WD) Systems Service and Repair. 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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