P1447
NOTE: If both DTC P0510 and P1447 are displayed, perform TROUBLE DIAGNOSIS FOR DTC P0510 first.
SYSTEM DESCRIPTION
In this evaporative emission (EVAP) control system, purge flow occurs during non-closed throttle conditions. Purge volume is related to air intake volume. Under normal purge conditions (non-closed throttle), the EVAP canister purge volume control valve and EVAP canister purge control valve are open. Purge flow exposes the EVAP control system pressure sensor to intake manifold vacuum.
ON BOARD DIAGNOSIS LOGIC
Under normal conditions (non-closed throttle), sensor output voltage indicates it pressure drop and purge flow are adequate. It not, a fault is determined.
DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE
CAUTION: Always drive vehicle at a sate speed.
NOTE: If "DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE" has been previously conducted, always turn ignition switch "OFF" and wait at least 5 seconds before conducting the next test.
TESTING CONDITION:
- This test may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a road test is expected to be easier, it is unnecessary to lift the vehicle.
- Always perform test at temperature of 5°C (41°F) or more.
With Consult
1) Start engine and warm it up to normal operating temperature.
2) Turn ignition switch "OFF" and wait at least 5 seconds.
3) Start engine (TCS switch "OFF") and let it idle for at least 1 minute.
4) Select "PURG ON/V & S/V P1493" of "EVAPORATIVE SYSTEM" in "DTC WORK SUPPORT" mode with CONSULT.
5) Touch "START".
6) When the following conditions are met, "TESTING" will be displayed on the CONSULT screen. Maintain the conditions continuously until "TESTING" changes to "COMPLETED". (It will take at least 30 seconds.)
CMPS.RPM (POS): 1,000 - 2,100 rpm
Vehicle speed: 40 - 100 km/h (25 - 62 MPH)
B/FUEL SCHDL: 2 - 4.8 ms
Selector lever: Suitable position
If "TESTING" is not displayed after 5 minutes, retry from step 2).
7) Make sure that "OK" is displayed after touching "SELFDIAG RESULTS". If "NG" is displayed, refer to "DIAGNOSTIC PROCEDURE".
8) Select "PURG VOL C/V P1444" of "EVAPORATIVE SYSTEM" in "DTC WORK SUPPORT" mode with CONSULT.
9) Touch "START".
If "COMPLETED" is displayed, go to 11).
10) When the following conditions are met, "TESTING" will be displayed on the CONSULT screen. Maintain the conditions continuously until "TESTING" changes to "COMPLETED". (It will take at least 20 seconds.)
CMPS.RPM (POS): 1,000 - 2,100 rpm
Vehicle speed: 40 - 80 km/h (25 - 50 MPH)
B/FUEL SCHDL: 2 - 4.8 ms
Selector lever: Suitable position
If "TESTING" is not displayed after 5 minutes, retry from step 2).
11) Make sure that "OK" is displayed after touching "SELFDIAG RESULTS". If "NG" is displayed, refer to "DIAGNOSTIC PROCEDURE" of "TROUBLE DIAGNOSIS FOR DTC P1444".
12) Select "PURG FLOW P1447" of "EVAPORATIVE SYSTEM" in "DTC CONFIRMATION" mode with CONSULT.
13) Touch "START".
14) When the following conditions are met, "TESTING" will be displayed on the CONSULT screen. Maintain the conditions continuously until "TESTING" changes to "COMPLETED". (It will take at least 35 seconds.)
CMPS.RPM (POS): 1,000 - 2,100 rpm
Vehicle speed: 30 - 100 km/h (19 - 62 MPH)
Selector lever: Suitable position
Engine coolant temperature: 70 - 100°C (158 - 212°F)
If "TESTING" is not displayed after 5 minutes, retry from step 2).
15) Make sure that "OK" is displayed after touching "SELFDIAG RESULTS". If "NG" is displayed, refer to "DIAGNOSTIC PROCEDURE".
OR
OVERALL FUNCTION CHECK
Use this procedure to check the overall monitoring function of the EVAP control system purge flow. During this check, a 1st trip DTC might not be confirmed.
Without Consult
1) Lift up drive wheels.
2) Start engine (TCS switch "OFF") and warm it up to normal operating temperature.
3) Turn ignition switch "OFF", wait at least 5 seconds.
4) Start engine and wait at least 70 seconds.
5) Set voltmeter probes to ECM terminals (92) (EVAP control system pressure sensor signal) and (128) (ECM ground).
6) Check EVAP control system pressure sensor value at idle speed.
7) Establish and maintain the following conditions for at least 1 minute.
Air conditioner switch: ON
Steering wheel: Fully turned
Headlamp switch: ON
Rear window defogger switch: ON
Engine speed: Approx. 3,000 rpm
Gear position:
Any position other than "P", "N" or "R"
Verify that EVAP control system pressure sensor value stays 0.1V less than the value at idle speed for at least 1 second.
INSPECTION PROCEDURE
COMPONENT INSPECTION
EVAP Canister Purge Volume Control Valve
With Consult
1) Disconnect EVAP canister purge volume control valve harness connector.
2) Check resistance between the following terminals.
terminal (2) and terminals (1), (3)
terminal (5) and terminals (4), (6)
Resistance: Approximately 35 - 43 Ohms At 25°C (77°F)
3) Reconnect EVAP canister purge volume control valve harness connector.
4) Remove EVAP canister purge volume control valve from intake manifold collector and disconnect hoses from the valve.
(Plug the purge hoses. The EVAP canister purge volume control valve harness connector should remain connected.)
5) Turn ignition switch "ON".
6) Perform "PURG VOL CONT/V" in "ACTIVE TEST" mode with CONSULT. Check that EVAP canister purge volume control valve shaft moves smoothly forward and backward according to the valve opening.
If NG, replace the EVAP canister purge volume control valve.
OR
Without Consult
1) Disconnect EVAP canister purge volume control valve harness connector.
2) Check resistance between the following terminals.
terminal (2) and terminals (1), (3)
terminal (5) and terminals (4), (6)
Resistance: Approximately 35 - 43ohms At 25°C (77°F)
3) Reconnect EVAP canister purge volume control valve harness connector.
4) Remove EVAP canister purge volume control valve from intake manifold collector and disconnect hoses from the valve.
(Plug the purge hoses. The EVAP canister purge volume control valve harness connector should remain connected.)
5) Turn ignition switch "ON" and "OFF". Check that EVAP canister purge volume control valve shaft moves smoothly forward and backward according to the ignition switch position.
If NG, replace the EVAP canister purge volume control valve.
EVAP Canister Purge Control Valve
Check EVAP canister purge control valve as follows:
1. Blow air in port (A), (B) and (C), then ensure that there is no leakage.
2. Apply vacuum to port (A). [Approximately -13.3 to -20.0 kPa (-100 to -150 mmHg, -3.94 to -5.91 in Hg)]
Blow air in port (C) and ensure free flow out of port (B).
EVAP Canister Purge Control Solenoid Valve
Check air passage continuity.
One-way Valve
Check one-way valve air passage continuity.
If NG, replace one-way valve.