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.
Check Voltage
Ignition "OFF"
Disconnect Injector connector
Ignition "ON" & Engine "OFF"
Measure voltage between terminal 2 of injector harness connector and chassis ground.
Specification : Approx. B+
Is the measured voltage within specifications ?
YES
▶ Go to "Control Circuit Insepction" procedure.
NO
▶ Go to "Check for open in harness" as below.
Check for open in harness
Ignition "OFF"
Disconnect injector connecotor.
Measure resistance between terminal 2 of injector harness connector and terminal 87 of Control Relay harness connector.
Specification : Approx. below 1Ω
Is the measured resistance within specifications ?
YES
▶ Go to "Control Circuit Inspection" procedure.
NO
▶ Check for open in harness.
▶ Check that injector fuse 20A between injector and Control Relay is installed or blown off.
▶ Repair or replace as necessary. And then, go to "Verification of Vehicle Repair" procedure.
Check for short to ground in harness
Ignition "OFF"
Disconnect injector connector
Measure resistance between terminal 1 of injector harness connector and chassis ground
Specification : Infinite
Is the measured resistance within specifications?
YES
▶ Go to "Check for open in harness" as below
NO
▶ Check for short to ground in harness.
▶ Repair or replace as necessary. And then, go to "Verification of Vehicle Repair" procedure.
Check for open in harness
Ignition "OFF"
Disconnect injector connector and PCM connector.
Measure resistance betweeen termnial 1 of injector harness connector and terminal 1 / C21-A of PCM harness connector.
Specification : Approx. below 1Ω
Is the measured resistance within specifications?
YES
▶ Go to "Component Inspection" procedure.
NO
▶ Check for open in harness.
▶ Repair or replace as necessary. And then, go to "Verification of Vehicle Repair" procedure.
