LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Jeep >> 2002 >> Wrangler SE, Automatic >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Body Control Modules >> System Tests >> Sentry Key Immobilizer System >> Rolling Code Failure Or VIN Mismatch
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Rolling Code Failure Or VIN Mismatch

  1. Using scan tool, read and record Sentry Key Immobilizer Module (SKIM) Diagnostic Trouble Codes (DTC). Erase SKIM DTCs. Turn ignition off for 10 seconds. Turn ignition on. Wait 2 minutes. Read SKIM DTCs. If same fault message is currently displayed, go to next step. If same fault message is not currently displayed, go to step  4 .
    NOTE: Ensure Vehicle Identification Number (VIN) is programmed in Powertrain Control Module (PCM) before performing next step. See POWERTRAIN CONTROL MODULE  under PROGRAMMING.
  2. Turn ignition on. Using scan tool, select ENGINE. Read and record VIN. If VIN stored in PCM matches VIN stamped on tag in left front of dashboard, replace SKIM. If VIN does not match, replace PCM and reprogram. See POWERTRAIN CONTROL MODULE  under REMOVAL & INSTALLATION.
  3. Turn ignition off. Replace SKIM. See SENTRY KEY IMMOBILIZER MODULE  under REMOVAL & INSTALLATION. Turn ignition on for 90 seconds. Turn ignition off. Repeat 5 times. Read SKIM DTCs. If same fault message is currently displayed, replace Powertrain Control Module (PCM). See POWERTRAIN CONTROL MODULE  under REMOVAL & INSTALLATION. If same fault message is not currently displayed, test is complete.
  4. Check wiring, connectors and system components. If any problem is found, repair as necessary. If no problem is found, test is complete.
scientia non olet · About LEMON Manuals