Pinpoint Test AD: DTC U0155:00

Anti-Lock Control - Four-Channel

Pinpoint Tests

Pinpoint Test AD: DTC U0155:00

Normal Operation
- DTC U0155:00 (Lost Communication With Instrument Panel Cluster (IPC) Control Module: No Sub Type Information) - a continuous memory DTC set by the ABS module if it does not receive All-Wheel Drive (AWD) range, traction control switch, trailer sway and hill descent control data from the Instrument Panel Cluster (IPC) for 5 seconds or longer.

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

PINPOINT TEST AD: DTC U0155:00

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AD1 VERIFY THE CUSTOMER CONCERN

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

Yes
GO to AD2.

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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AD2 CHECK THE COMMUNICATION NETWORK

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

Yes
GO to AD3.

No
REFER to Module Communications Network Testing and Inspection.

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AD3 RETRIEVE THE RECORDED DTCs FROM THE ABS MODULE AND IPC SELF-TESTS

- Check for recorded ABS module and IPC DTCs from the self-test.
- Is DTC B11E8:16 (U3003:16) or DTC B11E8:17 (U3003:17) recorded?

Yes
For DTC B11E8:16, GO to Pinpoint Test P. For DTC B11E8:17, GO to Pinpoint Test Q. For the IPC, REFER to Instrumentation, Message Center, and Warning Chimes Testing and Inspection. Pinpoint Test P: DTC B11E8:16 Pinpoint Test Q: DTC B11E8:17

No
GO to AD4.

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AD4 RECHECK THE ABS MODULE DTCs

- Clear the DTCs.
- Wait 10 seconds.
- Repeat the ABS module self-test.
- Is DTC U0155:00 still present?

Yes
GO to AD5.

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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AD5 CHECK FOR DTC U0155:00 SET IN OTHER MODULES

- Clear the DTCs.
- Ignition OFF.
- Ignition ON.
- Wait 10 seconds.
- Enter the following diagnostic mode on the scan tool: IPC Self-Test.
- Retrieve the continuous memory DTCs from all modules.
- Is DTC U0155:00 set in more than one module?

Yes
INSTALL a new IPC. REFER to Instrumentation, Message Center, and Warning Chimes Instrument Panel Cluster (IPC). 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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