Pinpoint Test Z: DTC U0102:00

Anti-Lock Control - Four-Channel

Pinpoint Tests

Pinpoint Test Z: DTC U0102:00

Normal Operation
- DTC U0102:00 (Lost Communication With Transfer Case Control Module: No Sub Type Information) - a continuous memory DTC set by the ABS module if the 4WD message that should be received from the Transfer Case Control Module (TCCM) is missing for 5 seconds or longer.

This pinpoint test is intended to diagnose the following:
- Communication network concern
- TCCM
- ABS module

PINPOINT TEST Z: DTC U0102:00

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Z1 VERIFY THE CUSTOMER CONCERN

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

Yes
GO to Z2.

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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Z2 CHECK THE COMMUNICATION NETWORK

- 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 Z3.

No
REFER to Module Communications Network Testing and Inspection.

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Z3 RETRIEVE THE RECORDED DTCs FROM THE ABS MODULE AND TCCM SELF-TESTS

- Check for recorded ABS module and TCCM DTCs from the self-test.
- Is DTC P0562:00 (or B11E8:16) or DTC P0563:00 (or B11E8:17) recorded?

Yes
For DTC B11E8:16, GO to Pinpoint Test P. For DTC B11E8:17, GO to Pinpoint Test Q. For the TCCM, REFER to Four Wheel Drive (4WD) Systems . Pinpoint Test P: DTC B11E8:16 Pinpoint Test Q: DTC B11E8:17

No
GO to Z4.

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Z4 RECHECK THE ABS MODULE DTCs

- Clear the DTCs.
- Wait 10 seconds.
- Repeat the ABS module self-test.
- Is DTC U0102:00 still present?

Yes
GO to Z5.

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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Z5 CHECK FOR DTC U0102:00 SET IN OTHER MODULES

- Clear the 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 more than one module?

Yes
INSTALL a new TCCM. REFER to Four Wheel Drive (4WD) Systems . CLEAR the DTCs. REPEAT the ABS module self-test.

No
INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module Service and Repair. TEST the system for normal operation.

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