3.
Measure resistance between terminals 1 of the ECT sensor harness connector and 25 of the ECM harness connector.
Specification : Approx. 0Ω
Ignition "OFF".
Disconnect ECM connector.
Measure resistance between terminals 1 of the ECT sensor harness connector and 25 of the ECM harness connector.
Specification : Approx. 0Ω
Is resistance within the specification?
YES
▶ Go to "Terminal and connector Inspection" procedure.
NO
▶ Repair open circuit and go to "Verification of Vehicle Repair" procedure.
Check for open in signal circuit.
Measure resistance between terminals 3 of the ECT sensor harness connector and 24 of the ECM harness connector.
Specification : Approx. 0Ω
Is resistance within the specification?
YES
Go to next step as below.
NO
Repair as necessary and go to "Verification of Vehicle Repair" procedure.
Check for short to battery in signal circuit.
Ignition "ON" & Engine "OFF".
Measure voltage between terminals 3 of the ECT sensor harness connector and 24 of the ECM harness connector.
Specification : Approx. 0V
Is voltage within the specification?
YES
▶ Go to "Terminal and Connector Inspection" procedure
NO
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.
Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
Has a problem been found?
YES
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure .
NO
▶ Go to "Component Inspection" procedure.
