Pinpoint Test O: DTC: U0257:00

O1 VERIFY CUSTOMER CONCERN

Ignition ON.

Verify there is an observable symptom present.

Is an observable symptom present?

Yes

GO to O2

No	The system is operating normally at this time. The DTC may have been set due to high network traffic or intermittent fault condition.

O2 CHECK THE COMMUNICATION NETWORK
- Ignition ON.
- Using a diagnostic scan tool, perform the network test.
Does the FCIM pass the network test?

Yes GO to O3

No REFER to: Communications Network .

O3 RECHECK THE SCME (FRONT SEAT CLIMATE CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

NOTE: If new modules were installed prior to the DTC being set, the module configuration may be incorrectly set during PMI or the PMI may not have been carried out.

Using a diagnostic scan tool, clear the Continuous Memory Diagnostic Trouble Codes (CM DTCs).

Using a diagnostic scan tool, repeat the SCME self-test.

Is DTC U0257:00 still present?

Yes

GO to O4

No	The system is operating correctly at this time. The DTC may have been set due to high network traffic or intermittent fault condition.

O4 CHECK FOR DTC U0257:00 IN OTHER MODULES

NOTE: If new modules were installed prior to the DTC being set, the module configuration may be incorrectly set during PMI or the PMI may not have been carried out.
- Using a diagnostic scan tool, clear the Continuous Memory Diagnostic Trouble Codes (CM DTCs).
- Ignition OFF.
- Ignition ON.
- Wait 10 seconds.
- Using a diagnostic scan tool, retrieve the Continuous Memory Diagnostic Trouble Codes (CM DTCs) from all modules.
Is DTC U0140:00 set in other modules?

Yes Refer to FCIM Guided Routine .

No INSTALL a new DSM. REFER to: Driver Front Seat Module (DSM) .