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Substituting the ECM/PCM

Special Tools Required 

NOTE: Use this procedure when you need to substitute a known-good ECM/PCM during troubleshooting procedures.
  1. Make sure you have the anti-theft codes for the radio and the navigation system (if equipped).
  2. Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.
    Fig 1: Identifying Data Link Connector
    G06265742
  3. Turn the ignition switch ON (II).
  4. Make sure the HDS communicates with the ECM/ PCM. If it doesn't, go to the DLC circuit troubleshooting (see DLC CIRCUIT TROUBLESHOOTING ). If you are returning from DLC circuit troubleshooting, skip step 5 to 6, and clean the throttle body after substituting the ECM/PCM (see THROTTLE BODY CLEANING ).
  5. Select the INSPECTION MENU with the HDS.
  6. Select the ETCS TEST, then select the TP POSITION CHECK, and follow the screen prompts.
    NOTE: If the TP POSITION CHECK indicates FAILED, continue this procedure.
  7. Turn the ignition switch OFF.
  8. Remove the battery.
  9. Remove the cover (A).
    Fig 2: Identifying Cover
    G06265743
  10. Remove the bolts (D), then remove the ECM/PCM (E).
    Fig 3: Identifying ECM/PCM And Bolts
    G06265744
  11. Disconnect the ECM/PCM connectors A, B, and C.
    NOTE: ECM/PCM connectors A, B, and C have symbols (A=□, B= Δ, C=◦) embossed on them for identification.
  12. Install the parts in the reverse order of removal.
  13. Turn the ignition switch ON (II).
    NOTE: DTC P0630 "VIN Not Programmed or Mismatch" may be stored because the VIN has not been programmed into the ECM/PCM; ignore it, and continue this procedure.
  14. Manually input the VIN to the ECM/PCM with the HDS.
  15. Update the ECM/PCM if it does not have the latest software.
  16. Select the IMMOBI SYSTEM with the HDS.
  17. Enter the immobilizer code using the ECM/PCM replacement procedure in the HDS; this allows you to start the engine.
  18. Reset the ECM/PCM with the HDS.
  19. If the TP POSITION CHECK failed in step 6, clean the throttle body (see THROTTLE BODY CLEANING ).
  20. Do the ECM/PCM idle learn procedure (see ECM/PCM IDLE LEARN PROCEDURE ).
  21. Do the CKP pattern learn procedure.
  22. Enter the anti-theft codes for the radio and the navigation system (if equipped), and set the clock (if needed).
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