Pinpoint Test Q: DTC U0155

Anti-Lock Control

Pinpoint Test Q: DTC U0155


Normal Operation

- DTC U0155 (Lost Communication With Instrument Panel Cluster (IC) Control Module)- this DTC sets in continuous memory and on-demand if the traction control switch information, or other sensor messages from the IPC (Instrument Panel Cluster) are not received for 5 seconds or longer.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- IPC (Instrument Panel Cluster)

- ABS module

PINPOINT TEST Q : DTC U0155

Q1 VERIFY THE CUSTOMER CONCERN

- Ignition ON.

- Verify that there is an observable symptom present.

Is an observable symptom present?

Yes
GO to Q2.
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.

Q2 CHECK THE COMMUNICATION NETWORK

- Using a scan tool, carry out a Network Test.

Does the IPC (Instrument Panel Cluster) pass the network test?

Yes
GO to Q3.
No
REFER to Information Bus.

Q3 RETRIEVE THE RECORDED DTCs FROM THE ABS MODULE AND IPC (Instrument Panel Cluster) SELF-TESTS

- Enter the following diagnostic mode on the scan tool: Self Test- ABS Module.

- Enter the following diagnostic mode on the scan tool: Self Test- IPC (Instrument Panel Cluster).

Is ABS module DTC B1676 or IPC (Instrument Panel Cluster) DTC U3003:16 or DTC U3003:17 received?

Yes
For ABS module DTC B1676, GO to Pinpoint Test A. Pinpoint Test A: DTC B1676

For IPC (Instrument Panel Cluster) DTCs, REFER to Instrument Panel, Gauges and Warning Indicators.
No
GO to Q4.

Q4 RECHECK THE ABS MODULE DTCs

- Clear the DTCs.

- Ignition OFF.

- Wait 10 seconds.

- Ignition ON.

- Enter the following diagnostic mode on the scan tool: Self Test- ABS Module.

Is DTC U0155 still present?

Yes
GO to Q5.
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.

Q5 CHECK FOR DTC U0155 OR 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: Self Test- All CMDTCs (Continuous Memory Diagnostic Trouble Codes).

Is DTC U0155:00 set in more than 1 module?

Yes
INSTALL a new IPC (Instrument Panel Cluster). CLEAR the DTCs. REPEAT the ABS module self-test.
No
INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module . TEST the system for normal operation.