Pinpoint Test O: DTC U0155

Anti-Lock Control

Pinpoint Test O: DTC U0155

Normal Operation

- DTC U0155 (Lost Communication With Instrument Cluster (IC) Control Module)- sets in continuous and on-demand memory in the ABS module if data messages such as traction control switch and hill descent switch messages are missing for more than 5 seconds. For a complete list of all network messages, refer to Information Bus.

This pinpoint test is intended to diagnose the following:

- Communication network concern

- Instrument Cluster (IC)

- ABS Module

PINPOINT TEST O : DTC U0155

O1 VERIFY THE CUSTOMER CONCERN

- Ignition ON.

- Verify that there is an observable symptom present.

Is an observable symptom present?

Yes
GO to O2.

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.

O2 CHECK THE COMMUNICATION NETWORK

- Connect the scan tool.

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

Does the IC (Instrument Cluster) pass the Network Test?

Yes
GO to O3.

No
REFER to Information Bus.

O3 RETRIEVE THE RECORDED DTCs FROM THE IC (Instrument Cluster) SELF-TEST

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

Is DTC U3003:16 (or B1318) or DTC U3003:17 (or B1317) recorded?

Yes
REFER to Instrument Panel, Gauges and Warning Indicators.

No
GO to O4.

O4 RECHECK THE ABS MODULE DTCs

- Using a scan tool, clear the ABS module DTCs.

- Ignition OFF.

- Ignition ON.

- Wait 10 seconds.

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

Is DTC U0155 still present?

Yes
GO to O5.

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.

O5 CHECK FOR DTC U0155 SET IN OTHER MODULES

- Using a scan tool, clear all CMDTCs (Continuous Memory Diagnostic Trouble Codes).

- 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).

- Retrieve the continuous memory DTCs from all modules.

Is DTC U0155:00 or DTC U0155 set in more than one module?

Yes
INSTALL a new IC (Instrument Cluster). TEST the system for normal operation. 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.