Pinpoint Test M: DTC U0104

Cruise Control

Pinpoint Test M: DTC U0104

- DTC U0104 (Lost Communication With Cruise Control Module)- 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 (Cruise-Control Module)

PINPOINT TEST M : DTC U0104

M1 VERIFY THE CUSTOMER CONCERN

- Ignition ON.

- Verify 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.

M2 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 (Cruise-Control Module) pass the network test?

Yes
GO to M3.

No
REFER to Information Bus, The C-CM (Cruise-Control Module) Does Not Respond To The Scan Tool. Pinpoint Test U: The Cruise-Control Module (C-CM) Does Not Respond To The Scan Tool

M3 CHECK THE C-CM (Cruise-Control Module) FOR BATTERY VOLTAGE OUT-OF-RANGE DTCs

- Check for recorded C-CM (Cruise-Control Module) 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.

M4 RECHECK THE PCM DTCs

- Clear all DTCs.

- Ignition OFF.

- Ignition ON.

- Wait 10 seconds.

- Repeat the PCM self-test.

Is DTC U0104 still present?

Yes
GO to M5.

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.

M5 CHECK FOR DTC U0104 OR DTC U0104:00 SET IN OTHER MODULES

- Clear all DTCs.

- Ignition OFF.

- Ignition ON.

- Wait 10 seconds.

- Retrieve the continuous memory DTCs from all modules.

Is DTC U0104 or U0104:00 set in other modules?

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

No
INSTALL a new PCM. CLEAR the DTCs. REPEAT the self-test.