Pinpoint Test M: DTC U0104:00

Cruise Control

Pinpoint Tests

Pinpoint Test M: DTC U0104:00

Normal Operation
- DTC U0104:00 (Lost Communication With Cruise-Control Module (C-CM)) - sets in the PCM 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.

This pinpoint test is intended to diagnose the following:

- PCM
- C-CM



PINPOINT TEST M: DTC U0104:00

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M1 VERIFY THE CUSTOMER CONCERN


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

Yes
GO to M2.

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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M2 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 U0104 or DTC U0104:00 set in any module?

Yes
GO to M3.

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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M3 CHECK THE C-CM FOR BATTERY VOLTAGE OUT-OF-RANGE DTCs


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

Yes
GO to Pinpoint Test Q (U3003:16) or GO to Pinpoint Test R (U3003:17). Pinpoint Test Q: DTC U3003:16 Pinpoint Test R: DTC U3003:17

No
GO to M4.

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M4 CHECK FOR DTC U0104:00 SET IN THE IPC


- Ignition ON.
- Retrieve the continuous memory DTCs from the Instrument Panel Cluster (IPC).
- Is DTC U0104:00 set in the IPC?

Yes
INSTALL a new C-CM. REFER to Cruise-Control Module (C-CM) Service and Repair. TEST the system for normal operation.

No
INSTALL a new PCM. REFER to Computers and Control Systems. CLEAR the DTCs. REPEAT the self-test.

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