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VIN Mismatch

  1. Using scan tool, select ENGINE, then read DTCs. If scan tool displays an EEPROM DTC, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. If scan tool does not display an EEPROM DTC, go to next step.
  2. Ensure battery is fully charged. Using scan tool, read Sentry Key Immobilizer Module (SKIM) DTCs. Record DTCs and erase. Turn ignition off and back on again. Wait approximately 3 minutes before attempting to read DTCs. Using scan tool, read SKIM DTCs. If no additional DTCs are set, go to next step. If an EEPROM DTC is also set, go to step  4. If ROLLING CODE with or without EEPROM ERROR DTC is also set, go to step  5.
  3. Go to diagnostics for current VIN MISMATCH DTC. After repairs, go to step  8.
  4. Go to diagnostics for history EEPROM DTC. After repairs, go to step  6.
  5. If ROLLING CODE with or without EEPROM ERROR DTC is history, go to next step. If ROLLING CODE with or without EEPROM ERROR DTC is current, go to step  8.
  6. Using scan tool, erase all SKIM DTCs. Start engine 20 times and then check for SKIM DTCs. If EEPROM FAILURE DTC sets, replace SKIM. See SENTRY KEY IMMOBILIZER MODULE (SKIM)  under REMOVAL & INSTALLATION. If EEPROM FAILURE DTC does not set, go to next step.
  7. Start engine and allow to run for 3 minutes. Check for DTCs. If VIN MISMATCH DTC sets, go to next step. If ROLLING CODE DTC sets, go to step  12. If no DTCs set, test is complete.
  8. Using scan tool, read Vehicle Identification Number (VIN) stored in Powertrain Control Module (PCM). If VIN on scan tool matches VIN on vehicle, go to next step. If VIN on scan tool matches VIN on vehicle, replace PCM. See POWERTRAIN CONTROL MODULE (PCM)  under REMOVAL & INSTALLATION.
  9. Using scan tool, read Vehicle Identification Number (VIN) stored in SKIM. If VIN on scan tool matches VIN on vehicle, go to next step. If VIN on scan tool matches VIN on vehicle, replace SKIM.
  10. Using scan tool, erase VIN MISMATCH DTC. Verify DTC has been cleared from memory. If VIN MISMATCH DTC is cleared, go to next step. If VIN MISMATCH DTC is not cleared, replace SKIM.
  11. Start engine and allow to run for 3 minutes. Check for DTCs. If VIN MISMATCH DTC sets, replace SKIM. If VIN MISMATCH DTC does not set, test is complete.
  12. Using scan tool, erase any DTCs. Select THEFT ALARM, SKIM on scan tool. If NO RESPONSE is indicated, go to NO RESPONSE FROM SENTRY KEY IMMOBILIZER MODULE (SKIM)  under COMMUNICATIONS. If scan tool does not indicate NO RESPONSE, go to next step.
  13. Using scan tool, erase any DTCs. Select BODY, BODY COMPUTER, SYSTEM TEST, PCM MONITOR on scan tool. If scan tool displays PCM ACTIVE ON BUS, go to next step. If PCM ACTIVE ON BUS is not displayed, go to PCM MESSAGE NOT RECEIVED; NO RESPONSE FROM PCM  under COMMUNICATIONS.
  14. Using scan tool, erase any DTCs. Select ENGINE on scan tool and read DTCs. If any PCM related DTCs are set, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. If no PCM related DTCs are set, replace SKIM.
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