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
IG "OFF" and disconnect Ignition Coil connector.
IG "ON" and ENG "OFF"
Measure voltage between terminal 1 of ignition coil harness connector and chassis ground.
Specification : Approx. B+
Is the measured voltage within specification ?
YES
▶ Go to "Control Circuit Inspection" procedure.
NO
▶ Check fuse connected to ignition coil for open.
▶ Repair open in harness, and go to "Verification of Vehicle Repair" procedure.
Check short to battery in harness.
IG "OFF" and disconnect ignitioncoil connector and PCM connector.
Measure resistance between terminals 1 and 2 of ignition coil harness connector.
Specification : Infinite
Is the measured resistance within specification?
YES
▶ Go to "Check short to ground in harness" as follows.
NO
▶ Repair short to battery in harness, and go to "Verification of Vehicle Repair" procedure.
Check short to ground in harness
IG "OFF" and disconnect ignition coil connector and PCM connector.
Measure resistance between terminal 2 of ignition coil harness connector and chassis ground.
Specification : Infinite
Is the measured resistance within specification?
YES
▶ Go to "Check open in harness" as follows.
NO
▶ Repair short to ground in harness, and go to "Verification of Vehicle Repair" procedure.
Check open in harness
IG "OFF" and disconnect Ignition Coil connector and PCM connector.
Measure resistance between terminal 2 of Ignition Coil harness connector and terminal C144-B(79) of PCM harness connector.
Specification : Below 1Ω
Is the measured resistance within specification?
YES
▶ Go to "Component Inspection" procedure.
NO
▶ Repair open in harness, and go to "Verification of Vehicle Repair" procedure.
