DTC Fault Trigger Conditions
DTC | Description | Fault Trigger Conditions |
|---|---|---|
U0256:00 Lost Communication With Front Controls Interface Module: No Sub Type Information | A continuous memory DTC that sets in the PAM if messages received from the FCIM are missing for 5 seconds or more. |
Possible Sources
Communication network concern GWM concern FCIM PAM (integral to the BCM)
PINPOINT TEST N : DTC (DIAGNOSTIC TROUBLE CODE) U0256:00
N1 VERIFY THE CUSTOMER CONCERN
Ignition ON. Verify there is an observable symptom present.
Is an observable symptom present?
Yes | GO to N2 |
|---|---|
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. CLEAR the DTC. |
N2 CHECK THE COMMUNICATION NETWORK
Using a diagnostic scan tool, perform the network test.
Do the FCIM and the GWM pass the network test?
Yes | GO to N3 |
|---|---|
No | REFER to: Communications Network (418-00 Module Communications Network) . |
N3 PERFORM THE FCIM (FRONT CONTROLS INTERFACE MODULE) SELF-TEST
Using a diagnostic scan tool, perform the FCIM self-test.
Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes | For vehicles with the touchscreen display, REFER to: Information and Entertainment System (415-00 Information and Entertainment System - General Information - Vehicles With: Touchscreen Display) . For vehicles without the touchscreen display, REFER to: Information and Entertainment System (415-00A Information and Entertainment System - General Information - Vehicles With: AM/FM/CD/SYNC, Diagnosis and Testing). |
|---|---|
No | GO to N4 |
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