W/Harness Inspection

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness and terminal condition. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?
YES
- Repair as necessary and go to "Verification of Vehicle Repair" procedure
NO
- Go to" Power Circuit Inspection" procedure.

Power Supply Circuit Inspection

1. Check voltage
(1) IG "OFF" and disconnect Ignition Coil connector.
(2) IG "ON" and ENG "OFF"
(3) Measure voltage between terminal 2 of ignition coil harness connector and chassis ground.
A. Specification : Approx. B+




(4) 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.

Control Circuit Inspection

1. Check short to battery in harness.
(1) IG "OFF" and disconnect ignition coil connector and PCM connector.
(2) Measure resistance between terminals 1 and 2 of ignition coil harness connector.
A. Specification : Infinite Ohms




(3) 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.
2. Check short to ground in harness
(1) IG "OFF" and disconnect ignition coil connector and PCM connector.
(2) Measure resistance between terminal 1 of ignition coil harness connector and chassis ground.
A. Specification : Infinite Ohms




(3) 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.
3. Check open in harness
(1) IG "OFF" and disconnect Ignition Coil connector and PCM connector.
(2) Measure resistance between terminal 1 of Ignition Coil harness connector and terminal 77 of PCM harness connector.
A. Specification : Below 1 Ohm




(3) 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.