Pinpoint Test Y: DTC U0151:00
Information and Entertainment System
Pinpoint Tests
Pinpoint Test Y: DTC U0151:00
Normal Operation
The Accessory Protocol Interface Module (APIM) receives the emergency call notification message from the Restraints Control Module (RCM) via the High Speed Controller Area Network (HS-CAN). This message indicates to the APIM the status of the emergency call system.
As other modules outside of the audio system also receive this message, all modules receiving it should exhibit a symptom if the message is missing.
- DTC U0151:00 (Lost Communication With Restraints Control Module: No Sub Type Information) - set by the APIM when it is missing the emergency call notification message from the RCM over the HS-CAN 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 Y: DTC U0151:00
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Y1 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 DTC U0151 or DTC U0151:00 set in any modules?
Yes
GO to Y2.
No
The system is operating correctly at this time. The DTC may have been set due to an intermittent fault in the network wiring.
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Y2 CHECK FOR BATTERY VOLTAGE OUT-OF-RANGE DTCs
- Carry out the self-test for the following modules:
- APIM
- PCM
- RCM
- Instrument Panel Cluster (IPC)
- Are any low or high voltage DTCs recorded in any module?
Yes
For the APIM, REFER to the DTC charts. Information and Entertainment Systems
For all other modules, REFER to the Diagnostic Trouble Code (DTC) Chart in Multifunction Electronic Modules Testing and Inspection.
No
GO to Y3.
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Y3 CHECK FOR DTC U0151 OR DTC U0151:00 SET IN MULTIPLE MODULES
- Review the recorded results from the self-test.
- Is DTC U0151 or DTC U0151:00 set in more than one module?
Yes
GO to Y4.
No
If there is an observable audio system symptom, GO to Symptom Chart - General Audio System to diagnose the symptom. Symptom Chart - General Audio System
If there is an observable restraints system symptom, REFER to Supplemental Restraint System Principles of Operation to diagnose the symptom.
If there is no observable symptom, CHECK the wiring between the APIM and the RCM for an intermittent fault.
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Y4 CHECK FOR CORRECT RCM OPERATION
- Disconnect all the RCM connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the RCM connectors and make sure they seat correctly.
- Is the concern still present?
Yes
INSTALL a new RCM. REFER to Supplemental Restraint System Service and Repair. CLEAR all continuous DTCs. TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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