3.
Measure resistance between terminal 2 of the IATsensor harness connector and 23 of the ECM harness connector.
Specification : Approx. 0Ω
Ignition "OFF".
Disconnect ECM connector.
Measure resistance between terminal 2 of the IATsensor harness connector and 23 of the ECM harness connector.
Specification : Approx. 0Ω
Is resistance within the specification?
YES
▶ Go to "Terminal and Connetor Inspection" procedure.
NO
▶ Repair open circuit and go to "Verification of Vehicle Repair" procedure
Check for open in signal circuit
Measure resistance between terminals 1 of the IAT sensor harness connector and 22 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".
With IATS and ECM connector still disconnected, measure voltage between terminals 1 of the IAT sensor harness connector and 22 of the ECM harness connector.
Specification : Approx. 0V
Is voltage within the specification?
YES
▶ Go to "Terminal and Connector Inspection" procedure.
NO
▶ Repair open circuit 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.
