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U0401–IMPLAUSIBLE DATA RECEIVED FROM ECM (FDCM) For a complete wiring diagram Refer to Section 8W • When Monitored: • Set Condition: Possible Causes POWERTRAIN DTCS PRESENT FINAL DRIVE CONTROL MODULE Diagnostic Test 1. POWERTRAIN DTCS PRESENT Ignition on. With the scan tool, select View DTCs in the Powertrain Control Module. Are there any DTCs present? Yes >> Refer to the symptom list and perform the applicable diagnostic procedure. Perform the TRANSFER CASE VERIFICATION TEST-VER 1. No >> Replace the Final Drive Control Module in accordance with the Service Information. Perform the TRANSFER CASE VERIFICATION TEST-VER 1. 21 - 986 TRANSFER CASE - ELECTRICAL DIAGNOSTICS WK |