Antilock Brakes / Traction Control Systems

Anti-Lock Control - Four-Channel

Pinpoint Test AC: DTC U0151:00

Normal Operation

- DTC U0151:00 (Lost Communication with Restraints Control Module: No Sub Type Information)- a continuous memory DTC set by the ABS module if it does not receive yaw or other sensor messages from the Restraints Control Module (RCM) for 5 seconds or longer.

This pinpoint test is intended to diagnose the following:

- Communication network concern

- RCM (Restraints Control Module)

- ABS module

PINPOINT TEST AC : DTC U0151:00

AC1 VERIFY THE CUSTOMER CONCERN

- Ignition ON.

- Verify that there is an observable symptom present.

Is an observable symptom present?

Yes
GO to AC2.

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.

AC2 CHECK THE COMMUNICATION NETWORK

- Connect the scan tool.

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

Does the RCM (Restraints Control Module) pass the Network Test?

Yes
GO to AC3.

No
REFER to Information Bus.

AC3 RETRIEVE THE RECORDED DTCs FROM THE ABS MODULE AND RCM (Restraints Control Module) MODULE 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- RCM (Restraints Control Module).

Is DTC B11E8:16 (U3003:16) or DTC B11E8:17 (U3003:17) recorded?

Yes
For ABS module DTC B11E8:16, GO to Pinpoint Test P. Pinpoint Test P: DTC B11E8:16

For ABS module DTC B11E8:17, GO to Pinpoint Test Q. Pinpoint Test Q: DTC B11E8:17

For the RCM (Restraints Control Module), REFER to Restraints and Safety Systems &/or Air Bag Systems.

No
GO to AC4.

AC4 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 U0151:00 still present?

Yes
GO to AC5.

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.

AC5 CHECK FOR DTC U0151:00 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 U0151:00 set in more than one module?

Yes
INSTALL a new RCM (Restraints Control Module). 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.