Symptom:
     Replace the automatic transmission PCM computer, will cause the shift difficult or automatic transmission damage.

     Failure analysis:
     This is due to maintenance personnel in the replacement of PCM computer, the error will AX4N automatic transmission PCM computer and AX4S automatic transmission PCM computer interchange caused. The AX4N automatic transmission PCM computer installed on the AX4S automatic transmission, will cause the transmission part of the noise. And the AX4S automatic transmission of the PCM computer installed on the AX4N automatic transmission, there will be automatic transmission misuse.
     Troubleshooting:
     To determine which automatic gearbox is equipped on the car, check the number sign on the driver's side door. Mark the lower right corner marked TR letters. There are several characters in the TR alphabet line. If the first character is L or T, then the car is equipped with AX4N automatic transmission; if the first character is X, indicating that the car is equipped with AX4S automatic transmission. Determine the automatic transmission model, according to the different automatic transmission box can be selected PCM computer.