W/Harness Inspection

Engine Control
P0453 Evaporative Emission System-Pressure Sensor High Input - Inspection/Repair:_:W/Harness Inspection

Terminal and Connector inspection

1. Many malfunctions in the electrical system are caused by poor harness and terminal connections.
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?






Signal Circuit Inspection

Check Short in signal circuit
1. IG "OFF" and disconnect FTPS connector.
2. IG "ON".
3. Measure voltage between signal terminal of FTPS harness connector and chassis ground.

Specification :Approx. 5V




4. Is the measured voltage within specification ?





Check Short to power in signal circuit
1. IG KEY "OFF".
2. Disconnect FTPS connector and ECM connector.
3. Measure the resistance between power and signal terminal of FTPS harness connector.

Specification :Infinite




4. Is the measured resistance within specification ?






Ground Circuit Inspection

Check open in harness
1. IG "OFF" and disconnect FTPS connector.
2. IG "ON".
3. Measure the voltage between power terminal of FTPS harness connector and chassis ground.(Measurement "A")
4. Measure the voltage between power and ground terminals of FTPS harness connector.(Measurement "B")

Specification :"A" - "B" = Below 200mV




5. Is the measured voltage within specification ?