Troubleshooting EFI Electronic Circuit

TROUBLESHOOTING THE EFI ELECTRONIC CIRCUIT WITH VOLT / OHMMETER

NOTE: Because the troubleshooting procedures are designed for inspection of each separate system, the actual troubleshooting procedure may vary somewhat. However, please refer to these procedures and perform actual troubleshooting; conforming to the inspection methods described. For example, it is better to first make a simple check of the fuses, fusible links and connecting condition of the connectors before making your inspection according to the procedures listed. These troubleshooting procedures are based on the supposition that the trouble lies in either a short or open circuit in a component outside the computer or a short circuit within the computer. If engine trouble occurs even though proper operating voltage is detected in the computer connectors, then the ECU is faulty and should be replaced.




VOLTAGE AT ECU CONNECTORS