Pinpoint Test S: DTC U0140:00

Cruise Control

Pinpoint Test S: DTC U0140:00

Normal Operation

- DTC U0140:00 (Lost Communication With Body Control Module: No Sub Type Information)- sets in the Cruise-Control Module (C-CM) if data messages received from the Body Control Module (BCM) over the High Speed Controller Area Network (HS-CAN) are missing. For a complete list of all network messages, refer to Information Bus.

This pinpoint test is intended to diagnose the following:

- BCM (Body Control Module)

- C-CM (Cruise-Control Module)

PINPOINT TEST S : DTC U0140:00

S1 VERIFY THE CUSTOMER CONCERN

- Ignition ON.

- Verify there is an observable symptom present.

Is an observable symptom present?

Yes
GO to S2.

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.

S2 CHECK THE COMMUNICATION NETWORK

- Ignition ON.

- Enter the following diagnostic mode on the scan tool: Network Test.

- Carry out the network test.

Does the BCM (Body Control Module) pass the network test?

Yes
GO to S3.

No
REFER to Information Bus, The BCM (Body Control Module) Does Not Respond To The Scan Tool Pinpoint Test I: The Body Control Module (BCM) Does Not Respond To The Scan Tool.

S3 RETRIEVE THE RECORDED DTCs FROM THE C-CM (Cruise-Control Module) AND BCM (Body Control Module) SELF-TEST

- Check for recorded DTCs from the C-CM (Cruise-Control Module) and BCM (Body Control Module) self-test.

Is DTC U3003:16 or DTC U3003:17 recorded?

Yes
For the C-CM (Cruise-Control Module), GO to Pinpoint Test Q (U3003:16) Pinpoint Test Q: DTC U3003:16 or GO to Pinpoint Test R (U3003:17) Pinpoint Test R: DTC U3003:17.

For the BCM (Body Control Module), REFER to Body Control Systems.

No
GO to S4.

S4 RECHECK THE C-CM (Cruise-Control Module) DTCs

- Clear the DTCs. Repeat the C-CM (Cruise-Control Module) self-test.

Is DTC U0140:00 still present?

Yes
GO to S5.

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.

S5 CHECK FOR DTC U0140:00 SET IN OTHER MODULES

- Clear all DTCs.

- Ignition OFF.

- Ignition ON.

- Wait 10 seconds.

- Retrieve the continuous memory DTCs from all modules.

Is DTC U0140:00 set in other modules?

Yes
INSTALL a new BCM (Body Control Module). CLEAR the DTCs. REPEAT the self-test.

No
INSTALL a new C-CM (Cruise-Control Module). REFER to Cruise-Control Module (C-CM) . TEST the system for normal operation.