Forward Collision Warning

Forward Collision Warning

Pinpoint Test C: DTC U0140:00

Normal Operation

- DTC U0140:00 (Lost Communication With Body Control Module: No Sub Type Information)- sets in the Head Up Display (HUD) module 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)

- HUD (Head Up Display) module

PINPOINT TEST C : DTC U0140:00

C1 VERIFY THE CUSTOMER CONCERN

- Ignition ON.

- Verify there is an observable symptom present.

Is an observable symptom present?

Yes
GO to C2.

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.

C2 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 C3.

No
REFER to Information Bus.

C3 RETRIEVE THE RECORDED DTCs FROM THE HUD (Head Up Display) MODULE SELF-TEST

- Check for recorded DTCs from the BCM (Body Control Module) and HUD (Head Up Display) module self-test.

Is DTC U3003:16, U3003:17 or DTC U3003:1C recorded?

Yes
For the C-CM (Cruise-Control Module), GO to Pinpoint Test E (U3003:16) Pinpoint Test E: DTC U3003:16 or GO to Pinpoint Test F (U3003:1C) Pinpoint Test F: DTC U3003:1C.

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

No
GO to C4.

C4 RECHECK THE HUD (Head Up Display) MODULE DTCs

- Clear the DTCs. Repeat the HUD (Head Up Display) module self-test.

Is DTC U0140:00 still present?

Yes
GO to C5.

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.

C5 CHECK FOR DTC U0140:00 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 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 HUD (Head Up Display) module. REFER to Head Up Display (HUD) Module . TEST the system for normal operation.