3.
Has a problem been found?
YES
a.
Repair as necessary and go to "Verification of Vehicle Repair" procedure .
NO
a.
Go to "Signal 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 "Signal Circuit Inspection" procedure.
Ignition "OFF"
Disconnect ICU and engine ECU connector.
Measure resistance between terminal "6" of the ICU harness and "3" of the engine ECU harness
Specification : Approx. 0 Ω
The ICU communicate with the engine ECU by dedicated communication line.
Is measured resistances within specification?
YES
Go to "Verification of Vehicle Repair " procedure.
NO
Check for open or short in signal harness. Repair as necessary and then go to "Verification of Vehicle Repair" procedure.
