4.
Is the measured voltage within specification ?
YES
a.
Go to "Component Inspection" procedure.
NO
a.
Go to " Check short to ground in harness" procedure.
Many malfunctions in the electrical system are caused by poor harness 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 " Signal Circuit Inspection " procedure.
■ Check voltage
IG "OFF" and disconnect IATS connector.
IG "ON" and ENG "OFF"
Measure voltage between signal terminal of IATS harness connector and chassis ground.
Specification : Approx. 5V
Is the measured voltage within specification ?
YES
Go to "Component Inspection" procedure.
NO
Go to " Check short to ground in harness" procedure.
■ Check short to ground in harness
IG "OFF" and disconnect IATS connector and PCM connector.
Measure resistance between signal terminal of IATS harness connector and chassis ground.(Measurement "A")
Measure resistance between signal and ground terminals of IATS harness connector.(Measurement "B")
Measure resistance between signal terminal of IATS harness connector and ground terminal of MAFS harness connector.(Measurement "B")
Specification : Infinite
Is the measured resistance within specification?
YES
Go to "Component inspection" procedure.
NO
Repair short to ground in harness and go to "Verification of Vehicle Repair" procedure.
