W/Harness Inspection

Terminal and connection inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. 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?






Power Circuit Inspection

Power Circuit Preliminary Inspection
1. IG KEY OFF.
2. Disconnect ETC connector.
3. IG KEY ON.
4. Measure voltage between TPS power circuit of ETC harness connector and chassis ground.

Specification : Approx. 5V





5. Is voltage within the specification?





Check for Short to Ground in Power Circuit
1. IG KEY OFF.
2. Disconnect PCM and ETC connector.
3. IG KEY ON.
4. Measure resistance between TPS power terminal of ETC harness connector and chassis ground.

Specification : Infinite





5. Is resistance within specification?





Check Open in Power Circuit
1. IG KEY OFF.
2. Disconnect ETC connector and PCM connector.
3. Measure resistance between both ends of TPS Power line.

Specification : Below 1 Ohm





4. Is resistance within specification?






Signal Circuit Inspection

Check for Short to Ground in Signal Circuit
1. IG KEY OFF.
2. Disconnect PCM and ETC connector.
3. Measure resistance between TPS1 signal terminal of ETC harness connector and chassis ground.

Specification : Infinite





4. Is resistance within specification?





Check for Open in Signal Circuit
1. IG KEY OFF.
2. Disconnect ETC connector and PCM connector.
3. Measure resistance between both ends of TPS1 signal line.

Specification : Below 1 Ohm.





4. Is resistance within specification?