P0452

J : P0452, O0453. FUEL TANK PRESSURE SENSOR LOW/HIGH INPUT.

NOTE:
- Prior to commencing this test, Electronic Engine Controls, Diagnosis and Testing, sensor supply and ground circuits.
- Access to the FTP sensor involves the removal of the fuel tank. To reduce the amount of work necessary, a slave harness and sensor could be used. This could be connected at the access port beneath the rear seat. Tests can then be carried out via the slave harness and sensor. If system operation is normal with the slave harness and sensor, the fault lies in the vehicle's harness or sensor.

J1 : CHECK FTPS SIGNAL WIRE FOR CONTINUITY UP TO CONNECTOR CA5.

1. Disconnect PCM electrical connector, EN16.
2. Disconnect FTPS electrical connector, CA5.
3. Check for continuity between EN16, pin 104 (RG) and CA5, pin 4 (RG).

This test will not check the continuity of the harness from CA5 to FT1. If the circuit is continuous to CA5, the fuel tank must be removed and the harness and sensor continuity checked.

Is the circuit continuous?
Yes
INSTALL a new FTPS, (and/or harness, CA5 to FT1). CLEAR the DTC. Turn the ignition switch to the ON position. Leave switched on for minimum 30 seconds. RECHECK DTCs. For additional information, see 'diagnostic drive cycles' above. If the DTC is repeated, INSTALL a new PCM. Before replacing a PCM, contact Dealer technical support.

No
REPAIR the circuit between EN16, pin 104 (RG) and CA5, pin 4 (RG). CLEAR the DTC. Carry out a full Evaporative system monitor drive cycle. For additional information, see 'diagnostic drive cycles' above. RECHECK DTCs.

J2 : CHECK FTPS SUPPLY WIRE FOR SHORT TO GROUND UP TO CONNECTOR CA5

1. Measure the resistance between CA5, pin 5 (OY) and GROUND.

This test will not check the integrity of the harness from CA5 to FT1. If the circuit is sound to CA5, the fuel tank must be removed and the harness and sensor continuity checked.

Is the resistance less than 10,000 ohms?
Yes
REPAIR the short to GROUND. For additional information, refer to wiring diagrams. CLEAR the DTC. Turn the ignition switch to the ON position. Leave switched on for minimum 30 seconds. RECHECK DTCs. For additional information, see 'diagnostic drive cycles' above.

No
Goto J3

J3 : CHECK FTPS SIGNAL WIRE FOR SHORT TO GROUND, UP TO CONNECTOR CA5.

1. Connect PCM electrical connector, EN16.
2. Measure the resistance between CA5, pin 4 (RG) and GROUND.

This test will not check the integrity of the harness from CA5 to FT1. If the circuit is sound to CA5, the fuel tank must be removed and the harness and sensor continuity checked.

Is the resistance less than 10,000 ohms?
Yes
REPAIR the short to GROUND. For additional information, refer to wiring diagrams. CLEAR the DTC. Turn the ignition switch to the ON position. Leave switched on for minimum 30 seconds. RECHECK DTCs. For additional information, see 'diagnostic drive cycles' above.

No
Goto J4

J4 : CHECK FTPS SIGNAL WIRE FOR SHORT TO BATTERY, UP TO CONNECTOR CA5

1. Turn the ignition switch to the ON position.
2. Check for a voltage at CA5, pin 4 (RG).

This test will not check the integrity of the harness from CA5 to FT1. If the circuit is sound to CA5, the fuel tank must be removed and the harness and sensor continuity checked.

Is the voltage greater than 1 volt?
Yes
REPAIR the short to battery. For additional information, refer to wiring diagrams. CLEAR the DTC. Turn the ignition switch to the ON position. Leave switched on for minimum 30 seconds. RECHECK DTCs. For additional information, see 'diagnostic drive cycles' above.

No
Goto J5

J5 : CHECK FTPS GROUND WIRE FOR SHORT TO BATTERY, UP TO CONNECTOR CA5

1. Turn the ignition switch to the ON position.
2. Check for a voltage at CA5, pin 6 (BG).

Is the voltage greater than 1 volt?
Yes
REPAIR the short to battery. For additional information, refer to wiring diagrams. CLEAR the DTC. Carry out a full Evaporative system monitor drive cycle, RECHECK DTCs. For additional information, see 'diagnostic drive cycles' above.

No
Goto J2

J6 : CHECK FTPS SUPPLY WIRE FOR SHORT TO BATTERY UP TO CONNECTOR CA5

1. Connect PCM electrical connector, EN16.
2. Turn the ignition switch to the ON position.
3. Check for a voltage at CA5, pin 5 (OY).

This test will not check the integrity of the harness from CA5 to FT1. If the circuit is sound to CA5, the fuel tank must be removed and the harness and sensor continuity checked.

Is the voltage greater than 5 volts?
Yes
REPAIR the short to battery. For additional information, refer to wiring diagrams. CLEAR the DTC. Carry out a full Evaporative system monitor drive cycle, RECHECK DTCs. For additional information, see 'diagnostic drive cycles' above.

No
INSTALL a new FTPS, (and/or harness, CA5 to FT1). CLEAR the DTC. Carry out a full Evaporative system monitor drive cycle, RECHECK DTCs. For additional information, see 'diagnostic drive cycles' above. If the DTC is repeated, INSTALL a new PCM. Before replacing a PCM, contact Dealer technical support.