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VIN Mismatch

  1. Using scan tool, select ENGINE and read DTCs. If EEPROM fault message is present, go to PCM FAILURE EEPROM WRITE DENIED test in appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. If EEPROM fault message is present, go to next step.
  2. Ensure battery is fully charged. Using scan tool, read and record SKIM DTCs. Erase SKIM DTCs. Turn ignition off, then back to RUN position. After 3 minutes, read SKIM DTCs. If only VIN MISMATCH fault message is currently displayed or was previously recorded, go to next step. If EEPROM FAILURE fault message is also displayed, go to step  3 . If ROLLING CODE FAILURE fault message is displayed with or without EEPROM FAILURE fault message is displayed, go to step  4 .
  3. Using scan tool, erase SKIM DTCs. Turn ignition off and wait 10 seconds. Start engine 20 times. Using scan tool, read SKIM DTCs. If EEPROM fault message is displayed, replace SKIM. Perform SKIM INITIALIZATION PROCEDURE  . If EEPROM failure is not displayed, go to next step.
  4. Start engine and allow to idle for 3 minutes. Using scan tool, read SKIM DTCs. If VIN MISMATCH fault message is displayed, go to next step. If ROLLING CODE fault message is displayed, go to step  9 . If none of the above fault messages are present, test is complete.
  5. Using scan tool, read VIN from Powertrain Control Module (PCM). If VIN output from PCM matches VIN on door jamb plate, go to next step. If VIN output from PCM does not match VIN on door jamb plate, replace PCM.
  6. Using scan tool, read VIN from SKIM. If VIN output from SKIM matches VIN on door jamb plate, go to next step. If VIN output from SKIM does not match VIN on door jamb plate, replace SKIM and perform SKIM INITIALIZATION PROCEDURE  .
  7. Using scan tool, erase VIN MISMATCH DTC. Turn ignition to RUN position and read SKIM DTCs. If VIN MISMATCH fault message is still present, replace SKIM and perform SKIM INITIALIZATION PROCEDURE  . If VIN MISMATCH fault message is not displayed, go to next step.
  8. Start engine and allow to idle for 3 minutes. Using scan tool, erase SKIM DTCs. Read SKIM DTCs. If SKIM MISMATCH fault message is still present, replace SKIM and perform SKIM INITIALIZATION PROCEDURE  . If SKIM MISMATCH fault message is not displayed, test is complete.
  9. Using scan tool, erase SKIM DTCs. Select THEFT ALARM, then SKIM. If scan tool displays NO RESPONSE, go to appropriate VEHICLE COMMUNICATIONS test in VEHICLE COMMUNICATIONS article. If scan tool does not display NO RESPONSE,
  10. Using scan tool, select BODY, then BODY COMPUTER. Select SYSTEM TEST, then PCM MONITOR. If scan tool displays PCM ACTIVE ON THE BUS, go to next step. If scan tool does not display PCM ACTIVE ON THE BUS, see appropriate VEHICLE COMMUNICATIONS article.
  11. Using scan tool, select ENGINE, then read DTCs. If scan tool displays any PCM related DTCs, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. If scan tool does not display any PCM related DTCs, replace smart key immobilizer module. Perform SKIM INITIALIZATION PROCEDURE  .
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