W/Harness Inspection

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

Terminal and Connector 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?
YES
> Repair as necessary and go to "Verification of Vehicle Repair" procedure.
NO
> Go to "Power Circuit Inspection" procedure.

Power Supply Circuit Inspection

1. Ignition "OFF".
2. Disconnect FTPS connector.
3. Ignition "ON" & Engine "OFF".
4. Measure voltage between terminal 1 of the FTPS harness connector and chassis ground.
Specification : Approx. 5V




5. Is voltage within the specification?
YES
> Go to "Ground Circuit Inspection" procedure.
NO
> Check for a open/short in the power supply circuit. Repair as necessary and go to "Verification of Vehicle Repair" procedure

Ground Circuit inspection

1. Ignition "OFF".
2. Disconnect PCM connector.
3. Measure resistance between terminals 2 of the FTPS harness connector and 34 of the PCM harness connector.
Specification : Approx. 0Ohms




4. Is resistance within the specification?
YES
> Go to "Signal Circuit Inspection" procedure
NO
> Check for a open/short circuit. Repair as necessary and go to "Verification of Vehicle Repair" procedure

Signal Circuit Inspection

1. Ignition "ON" & Engine "OFF".
2. Measure voltage between terminal 3 of the FTPS harness connector and chassis ground.
Specification : Approx. 0V




3. Is voltage within the specification?
YES
> Go to next step as below.
NO
> Repair as necessary and go to "Verification of Vehicle Repair" procedure.