3.
Has a problem been found?
YES
a.
Repair as necessary and go to "Verification of vehicle Repair" procedure
NO
a.
Go to "Power circuit inspection" 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 "Power circuit inspection" procedure.
Key "OFF".
Disconnect ISCA connector.
Key "ON".
Measure the voltage between terminal 2 of ISCA harness connector and chassis ground.
Specification : B+
Is the measured voltage within specification ?
YES
Go to "Control circuit inspection" procedure.
NO
Repair Open or Short in power circuit and then, go to "Verification of Vehicle Repair" procedure.
Check Open in control circuit
Key "OFF".
Disconnect ISCA connector and ECM connector.
Measure the resistance between terminal 1 of ISCA harness connector and terminal 6/CGGA-A of PCM harness connector. [A/T]
Measure the resistance between terminal 1 of ISCA harness connector and terminal 90/CGGM-K of ECM harness connector. [M/T]
Specification : Below Approx 1Ω
Is the measured resistance within specification ?
YES
Go to "Check Short in Control circuit" procedure.
NO
Repair Open in control circuit and then, go to "Verification of Vehicle Repair" procedure.
Check Short in control circuit
Key "OFF".
Disconnect ISCA connector and ECM connector.
Measure the resistance between terminal 1 of ISCA harness connector and chassis ground.
Specification : Infinite
Is the measured resistance within specification ?
YES
Go to "Component inspection" procedure.
NO
Repair Short to ground in control circuit and then, go to "Verification of Vehicle Repair" procedure.
