Notes on System Circuit Inspection

NOTE: Refer to Ignition Switch and PCM Connectors Notice in Service Precautions.

^ Most intermittent malfunctions are caused by faulty electrical connections or faulty wiring. Perform a careful check of the suspect circuits for any of the following conditions:
- Any poor mating of the connector halves
- Any electrical terminals that are not fully seated into the connector body
- Any improperly formed or damaged terminals. All connector electrical terminals in malfunctioning circuits should be carefully reformed in order to increase the contact tension.
- Any poor terminal-to-wire connection.
^ Use a digital multimeter whose minimum resistance is more than one megaohm per volt. Other digital multimeters should not be used because accurate measurements may not obtained.
^ When checking the voltage at each terminal of the connector while it is connected to the PCM, be sure to connect the negative probe to the body ground and use a jumper wire to connect the positive probe to the connector terminal being tested. Applying the electrical probes of the digital multimeter improperly may cause a sensor or the PCM to be shorted and damaged.