Troubleshooting With Volt/Ohmmeter

TROUBLESHOOTING WITH A VOLT-OHM METER
- The following troubleshooting procedures are designed for inspection of each separate system, and therefore the actual procedure may vary somewhat. However, troubleshooting should be done while referring to the inspection methods described in this manual.
- Before beginning inspection, it is best to first make a simple check of the fuses, H-fuses, fusible link and the condition of the connectors.
- The following troubleshooting procedures are based on the supposition that the trouble lies in either a short or open circuit within the ECM.
- If engine trouble occurs even though proper operating voltage is detected in the ECM connector, then it can be assumed that the ECM is faulty and should be replaced.

MFI SYSTEM CHECK PROCEDURE:
1. Disconnect the connectors from the ECM.



2. Remove the locks as shown in the illustration so that the tester probe(s) can easily come in.
NOTICE: Pay attention to sections A and B in the illustration which can be easily broken.

3. Reconnect the connectors to the ECM.

HINTS:
- Do all voltage measurements with the connectors connected.
- Verify that the battery voltage is 11.0 Volts or more when the ignition switch is in the "ON position.




- Using a voltmeter with high impedance (10 K Ohm/Volt minimum), measure the voltage at each terminal of the wiring connectors.