P0450

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
Specification data are reference values.




ECM Terminals and Reference Value
Specification data are reference values and are measured between each terminal and 32 (ECM ground).

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 5 seconds before conducting the next test.

TESTING CONDITION:
- Always perform test at a temperature above 5 °C (41 °F).
- Before performing the following procedure, confirm battery voltage is more than 11 V at idle.

With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 5 seconds.
3. Turn ignition switch ON.
4. Select "DATA MONITOR" mode with CONSULT-II.
5. Make sure that "TANK F/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.

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




2. Check that voltage between ECM terminal 60 (Fuel tank temperature sensor signal) and ground is less than 4.2 V.
3. Turn ignition switch OFF and wait at least 5 seconds.
4. Start engine and wait at least 11 seconds.
5. Select "MODE 7" with GST.
6. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.

No Tools
1. Start engine and warm it up to normal operating temperature.
2. Check that voltage between ECM terminal 60 (Fuel tank temperature sensor signal) and ground is less than 4.2 V.
3. Turn ignition switch OFF and wait at least 5 seconds.
4. Start engine and wait at least 11 seconds.
5. Turn ignition switch OFF, wait at least 5 seconds and then turn ON.
6. Perform "Diagnostic Test Mode II (Self-diagnostic results)" with ECM.
7. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.

EC-PRE/SE-01:

Wiring Diagram

Diagnostic Procedure

Step 1 - 3:

Step 4 - 6:

Step 7 - 9:

Step 10:

Step 11:

Step 12:

Step 13:

Step 14:

Step 15 - 17:

Step 18 - 20:

Step 21: