U0431
U0431 - IMPLAUSIBLE DATA RECEIVED FROM FCMWHEN MONITORED
Whenever the battery is connected.
SET CONDITION
When the module receives mixed messages from the FCM, this code will set.
POSSIBLE CAUSES
- Front control module (FCM)
- Power liftgate module
Diagnostic Test
1. DTC PRESENT
With the scan tool, record and erase DTC's.
Cycle the ignition switch from On to Off.
Wait 30 seconds.
Turn the ignition on.
With the scan tool, read DTCs.
Q: Does the scan tool display U0431-IMPLAUSIBLE DATA RECEIVED FROM FCM?
NO: Using the wiring diagram/schematic as a guide, inspect the wiring and connectors for an intermittent condition. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
YES: Go To 2
2. POWER LIFTGATE MODULE
With the scan tool, read DTCs in several other modules.
Q: Does the scan tool display U0431-IMPLAUSIBLE DATA RECEIVED FROM FCM in other modules?
NO: Replace the Power Liftgate Module. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
YES: Replace the Front Control Module. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test