Many malfunctions in the electrical system are caused by poor harness(s) and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
Check the following conditions:
Check for damaged harness and terminals: contact resistance, oxidation, bent or broken terminals.
Check for poor connection between ECM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection
Use a suitable male pin to ensure that contact in sockets is good. The pin should remain in position when pulled gently.
Has a problem been found?
YES
Repair as necessary and go to "Verification of Vehicle Repair" procedure
NO
Fault is intermittent caused by poor contact in the sensor＇s and/or PCM＇s connector or was repaired and PCM memory was not cleared..
System OK
CHECK REFERENCE VOLTAGE
Turn the ignition switch to ON and disconnect the OIL TEMPERATURE SENSOR connector
Measure the voltage between terminal 1 of the OIL TEMPERATURE SENSOR harness connector and chassis ground.
Test Condition : Ignition "ON"
Specification : Approximately 5 V
Is voltage display near the specified value?
YES
Go to "Oil temperature sensor Inspection" of the "Component Inspection" procedure
NO
Repair short to chassis ground in harness and Go to "Verification of Vehicle Repair" procedure
If signal circuit is OK, Go to "PCM inspection" of the "Component Inspection" procedure
