P0452

DTC P0452 EVAP SYSTEM PRESSURE SENSOR







Component Description
The EVAP control system pressure sensor detects pressure in the purge line. The sensor output voltage to the ECM increases as pressure increases. The EVAP control system pressure sensor is not used to control the engine system. It is used only for on board diagnosis.

CONSULT-II Reference Value In Data Monitor Mode:

On Board Diagnosis Logic:

DTC Confirmation Procedure

NOTE: If "DTC Confirmation Procedure" has been previously conducted, always turn ignition switch "OFF" and wait at least 10 seconds before conducting the next test.

TESTING CONDITION: Always perform test at a temperature of 5 °C (41 °F) or more.

WITH CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch "OFF" and wait at least 10 seconds.
3. Turn ignition switch "ON".
4. Select "DATA MONITOR" mode with CONSULT-II.
5. Make sure that "FUEL T/TEMP SE" is more than 0 °C (32 °F).





6. Start engine and wait at least 20 seconds.
7. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.
If 1st trip DTC is not detected, go to next step.
8. Stop engine and install EVAP service port adapter and pressure pump to EVAP service port securely.
9. Pressurize the EVAP line using pressure pump.
10. Confirm the pressure does not go up.
11. If pressure go up, go to "Diagnostic Procedure" below.

WITH GST
1. Start engine and warm it up to normal operating temperature.





2. Check that voltage between ECM terminal 75 (Fuel tank temperature sensor signal) and ground is less than 4.2 V
3. Turn ignition switch "OFF" and wait at least 10 seconds.
4. Start engine and wait at least 20 seconds.
5. Select "MODE 7" with GST.
6. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.

EC-PRE/SE-01:

Wiring Diagram

Diagnostic Procedure

Diagnostic Procedure Step 5 - 8:

Diagnostic Procedure Step 9 - 10:

Diagnostic Procedure Step 1 - 4: