Accessories and Optional Equipment

Information and Entertainment System

Pinpoint Test AI: DTC U0151:00

Normal Operation

The Accessory Protocol Interface Module (APIM) receives the eCall status message from the Restraints Control Module (RCM) via the High Speed Controller Area Network (HS-CAN). This message indicates to the APIM (Accessory Protocol Interface Module) the status of the emergency call system.

- DTC U0151:00 (Lost Communication With Restraints Control Module: No Sub Type Information)- set by the APIM (Accessory Protocol Interface Module) when it is missing the eCall status message from the RCM (Restraints Control Module) over the HS-CAN (High Speed Controller Area Network) for greater than 5 seconds with the ignition in the RUN position.

This pinpoint test is intended to diagnose the following:

- Communication network concern

- Restraints system concern

PINPOINT TEST AI : DTC U0151:00

AI1 CHECK FOR LOST COMMUNICATION DTCs

- Ignition ON.

- Clear continuous DTCs from all modules.

- Ignition OFF.

- Ignition ON.

- Wait at least 10 seconds.

- Retrieve all continuous DTCs from all modules.

Is U0151:00 set in any modules?

Yes
GO to AI2.

No
The system is operating correctly at this time. The DTC may have been set due to an intermittent fault in the network wiring.

AI2 CHECK FOR BATTERY VOLTAGE OUT-OF-RANGE DTCs

- Carry out the self-test for the following modules:
- APIM (Accessory Protocol Interface Module)

- PCM (Powertrain Control Module)

- RCM (Restraints Control Module)

- Instrument Panel Cluster (IPC)


Is DTC U3003:16 or DTC U3003:17 recorded in any module?

Yes
For the APIM (Accessory Protocol Interface Module) , REFER to DTC Charts Accessories and Optional Equipment.

For all other modules, REFER to the master list in Body Control Systems.

No
GO to AI3.

AI3 CHECK FOR DTC U0151 OR DTC U0151:00 SET IN MULTIPLE MODULES

- Review the recorded results from the self-test.

Is DTC U0151:00 set in more than one module?

Yes
GO to AI4.

No
If there is an observable audio system symptom, GO to Symptom Chart - General Audio System to diagnose the observed symptom Symptom Chart - General Audio System.

If there is an observable restraints system symptom, REFER to Restraints and Safety Systems &/or Air Bag Systems to diagnose the symptom.

If there is no observable symptom, CHECK the wiring between the APIM (Accessory Protocol Interface Module) and the RCM (Restraints Control Module) for a fault.

AI4 CHECK FOR CORRECT RCM (Restraints Control Module) OPERATION

- Disconnect all the RCM (Restraints Control Module) connectors.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect all the RCM (Restraints Control Module) connectors and make sure they seat correctly.

Is the concern still present?

Yes
INSTALL a new RCM (Restraints Control Module). CLEAR all continuous DTCs. REPEAT the APIM (Accessory Protocol Interface Module) self-test..

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR all continuous DTCs. REPEAT the APIM (Accessory Protocol Interface Module) self-test.