W/Harness Inspection

Engine Control
P0452 Evap. Emission System - Pressure Sensor Low 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 "Signal Circuit Inspection" procedure.
NO
> Check for a open in the power supply circuit. Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Signal Circuit Inspection

1. Check for open in signal circuit.
(1) Ignition "OFF".
(2) Disconnect PCM connector.
(3) Measure resistance between terminals 3 of the FTPS harness connector and 33 of the PCM harness connector.
Specification : Approx. 0Ohms




(4) Is resistance within the specification?
YES
> Go to next step as below.
NO
> Repair as necessary and go to "Verification of Vehicle Repair" procedure.
2. Check for short to ground in signal circuit
(1) Measure resistance between terminal 3 of the FTPS harness connector and chassis ground
Specification :Infinite




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