W/Harness Inspection

P0453 Evaporative Emission System Pressure Sensor/Switch High Input

Inspection/Repair - W/Harness Inspection

Terminal and Connector Inspection

1. 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.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?
YES
1) Repair as necessary and go to "Verification of Vehicle Repair" procedure.
NO
1) Go to " Power Circuit Inspection " procedure.

Power Supply Circuit Inspection

1. Check voltage of power circuit
(1) Key "OFF".
(2) Disconnect FTPS connector.
(3) Key "ON".
(4) Measure the voltage between terminal 1 of FTPS harness connector and chassis ground.
A. Specification : Approx. 5 V




(5) Is the measured voltage within specification?
YES
1) Go to "Ground circuit inspection" procedure.
NO
1) Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Ground Circuit inspection

1. Key "OFF".
2. Disconnect FTPS harness connector.
3. Key "ON".
4. Measure the voltage between terminal 1 of FTPS harness connector and chassis ground. (A)
5. Measure the voltage between terminal 1 and 2 of FTPS harness connector. (B)
A. Specification : A-B is below 200mV.




6. Is the measured voltage within specification?
YES
1) Go to "Signal circuit inspection" procedure.
NO
1) Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.

Signal Circuit Inspection

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




5. Is the measured voltage within specification?
YES
1) Go to "Component inspection" procedure.
NO
1) Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.