Power Liftgate Module
U0431 - Implausible Data Received From FCM
For a complete wiring diagram, refer to.
• When Monitored: Whenever the battery is connected.
• Set Condition: When the module receives mixed messages from the TIPM, this code will set.
Test Step 1 - DTC Present
• With the scan tool, record and erase DTCs.
• Cycle the ignition switch from On to Off.
• Wait 30 seconds.
• Turn the ignition ON.
• With the scan tool, check for DTCs.
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 the Body Verification Test. Refer to=> Non-DTC Based Diagnostics. Body Interior
Yes
• Go to Test Step 2 => [ Test Step 2 - Power Sliding Door Module ] U0431
Test Step 2 - Power Sliding Door Module
• With the scan tool, check for DTCs in several other modules.
Does the scan tool display U0431 - Implausible Data Received From FCM in other modules?
No
• Replace the power sliding door module.
• Perform the Body Verification Test. Refer to=> Non-DTC Based Diagnostics. Body Interior
Yes
• Replace the TIPM.
• Perform the Body Verification Test. Refer to=> Non-DTC Based Diagnostics. Body Interior