Pinpoint Test Ab : DTC: U0256:00

WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.

AB1 VERIFY CUSTOMER CONCERN

Ignition ON.

Verify there is an observable symptom present.

Is an observable symptom present?

Yes

GO to AB2

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

AB2 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 AB3

No REFER to: Communications Network .

AB3 RECHECK THE SCMG (DRIVER MULTI-CONTOUR SEAT MODULE) / SCMH (PASSENGER MULTI-CONTOUR SEAT 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 (CMDTCs).

Using a diagnostic scan tool, repeat the SCMG/ SCMH self-test.

Is DTC U0256:00 still present?

Yes

GO to AB4

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

AB4 CHECK FOR DTC U0256:00 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 (CMDTCs).
- Ignition OFF.
- Ignition ON.
- Wait 10 seconds.
- Using a diagnostic scan tool, retrieve the Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules.
Is DTC U0256:00 set in other modules?

Yes INSTALL a new FCIM. Refer to the appropriate Information and Entertainment Systems article for the procedure.

No INSTALL a new SCMG or SCMH. Refer to: Driver Multi-Contour Seat Module [SCMG] .