Pinpoint Test AT: DTC U0257:00

Instrumentation, Message Center and Warning Chimes

Pinpoint Test AT: DTC U0257:00

Normal Operation

- DTC U0257:00 (Lost Communication With Front Controls / Display Interface Module: No Sub Type Information)- sets in continuous memory in the Instrument Panel Cluster (IPC) if data messages received from the Front Control/Display Interface Module (FCDIM) over the High Speed Controller Area Network (HS-CAN) are missing for 5 seconds or more. For a complete list of all network messages, refer to Information Bus.

This pinpoint test is intended to diagnose the following:

- FCDIM (Front Control/Display Interface Module)

- IPC (Instrument Panel Cluster)

PINPOINT TEST AT : DTC U0257:00

AT1 VERIFY THE CUSTOMER CONCERN

- Ignition ON.

- Verify there is an observable symptom present.

Is an observable symptom present?

Yes
GO to AT2.

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.

AT2 CHECK THE COMMUNICATION NETWORK

- Ignition ON.

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

- Carry out the network test.

Does the FCDIM (Front Control/Display Interface Module) pass the network test?

Yes
GO to AT3.

No
REFER to Information Bus.

AT3 RETRIEVE THE RECORDED DTCs FROM THE FCDIM (Front Control/Display Interface Module) SELF-TEST

- Check for recorded DTCs from the FCDIM (Front Control/Display Interface Module) self-test.

Is DTC U3006:16 or DTC U3006:17 recorded?

Yes
REFER to Accessories and Optional Equipment.

No
GO to AT4.

AT4 RETRIEVE THE RECORDED DTCs FROM THE IPC (Instrument Panel Cluster) SELF-TEST

- Check for recorded DTCs from the IPC (Instrument Panel Cluster) self-test.

Is DTC U3006:16 or DTC U3006:17 recorded?

Yes
For DTC U3006:16, GO to Pinpoint Test AU Pinpoint Test AU: DTC U3006:16.

For DTC U3006:17, GO to Pinpoint Test AV Pinpoint Test AV: DTC U3006:17.

No
GO to AT5.

AT5 RECHECK THE IPC (Instrument Panel Cluster) DTCs

- Clear the DTCs.

- Wait 10 seconds.

- Repeat the IPC (Instrument Panel Cluster) self-test.

Is DTC U0257:00 still present?

Yes
GO to AT6.

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.

AT6 CHECK FOR DTC U0212:87 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 U0257:00 set in the Audio Control Module (ACM)?

Yes
INSTALL a new FCDIM (Front Control/Display Interface Module). CLEAR the DTCs. REPEAT the self-test.

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