Pinpoint Test AI: DTC U0100:00
Information and Entertainment System
Pinpoint Tests
Pinpoint Test AI: DTC U0100:00
Normal Operation
The Accessory Protocol Interface Module (APIM) receives network messages from the PCM via the High Speed Controller Area Network (HS-CAN). These messages include the odometer reading and the fuel level.
As other modules outside of the audio system also receive these messages, all modules receiving a particular message should exhibit a symptom if the message is missing.
- DTC U0100:00 (Lost Communication With ECM/PCM "A": No Sub Type Information) - set by the APIM when it is missing messages from the PCM 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
- PCM
PINPOINT TEST AI: DTC U0100:00
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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 DTC U0100 or DTC U0100:00 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.
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AI2 CHECK FOR BATTERY VOLTAGE OUT-OF-RANGE DTCs
- Carry out the self-test for the following modules:
- APIM
- PCM
- Instrument Cluster (IC)
- Is DTC B1317, B1318, U3003:16 or U3003:17 recorded in any module?
Yes
For the APIM, REFER to DTC Charts. Diagnostic Trouble Code Tests and Associated Procedures
For all other modules, REFER to the Diagnostic Trouble Code (DTC) Chart in Multifunction Electronic Modules Testing and Inspection.
No
GO to AI3.
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AI3 CHECK FOR DTC U0100 OR DTC U0100:00 SET IN MULTIPLE MODULES
- Review the recorded results from the self-test.
- Is DTC U0100 or DTC U0100:00 set in more than one module?
Yes
GO to AI4.
No
If there is an observable symptom, GO to Symptom Chart - General Audio System to diagnose the observed symptom. Symptom Chart - General Audio System
If there is no observable symptom, CHECK the wiring between the APIM and the PCM for an intermittent fault.
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AI4 CHECK FOR CORRECT PCM OPERATION
- Disconnect all the PCM connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the PCM connectors and make sure they seat correctly.
- Is the concern still present?
Yes
INSTALL a new PCM. CLEAR all continuous DTCs. REPEAT the APIM 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 self-test.
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