Pinpoint Tests AS: DTC U0104:00

Instrumentation, Message Center and Warning Chimes

Pinpoint Test AS: DTC U0104:00

Normal Operation
- DTC U0104:00 (Lost Communication With Cruise Control Module: No Sub-Type Information) - sets in the Instrument Panel Cluster (IPC) if data messages received from the Cruise-Control Module (C-CM) over the High Speed Controller Area Network (HS-CAN) are missing for greater than 5 seconds. For a complete list of all network messages, refer to Information Bus.

This pinpoint test is intended to diagnose the following:

- C-CM
- IPC



PINPOINT TEST AS: DTC U0104:00

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AS1 VERIFY THE CUSTOMER CONCERN


- Ignition ON.
- Verify that there is an observable symptom present.
- Is an observable symptom present?

Yes
GO to AS2.

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.

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AS2 CHECK THE COMMUNICATION NETWORK


- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Network Test.
- Carry out the network test.
- Does the C-CM pass the network test?

Yes
GO to AS3.

No
REFER to Information Bus.

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AS3 RETRIEVE THE RECORDED DTCs FROM THE IPC SELF-TEST


- Check for recorded DTCs from the IPC self-test.
- Is DTC U3003:16 or DTC U3003:17 recorded?

Yes
GO to Pinpoint Test BE (U3003:16) or GO to Pinpoint Test BF (U3003:17). Pinpoint Tests BE: DTC U3003:16 Pinpoint Tests BF: DTC U3003:17

No
GO to AS4.

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AS4 RECHECK THE IPC DTCs


NOTE: If new modules were installed prior to the DTC being set, the module configuration may be incorrectly set during the Programmable Module Installation (PMI) or the PMI may not have been carried out.

- Clear the DTCs. Repeat the IPC self-test.
- Is DTC U0104:00 still present?

Yes
GO to AS5.

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.

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AS5 CHECK FOR DTC U0104 SET IN OTHER MODULES


- Clear all DTCs.
- Ignition OFF.
- Ignition ON.
- Wait 10 seconds.
- Enter the following diagnostic mode on the scan tool: Self-Test.
- Retrieve the continuous memory DTCs from all modules.
- Is DTC U0104 set in the ABS module?

Yes
INSTALL a new C-CM. REFER to Fire Suppression System. CLEAR the DTCs. REPEAT the self-test.

No
INSTALL a new IPC. REFER to Instrument Panel Cluster (IPC) Instrument Panel Cluster (IPC). TEST the system for normal operation.

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