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Home >> Infiniti >> 1998 >> I30t V6-2988cc 3.0L DOHC MFI (VQ30DE) >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> P Code Charts >> P1447

P1447

NOTE: If both DTC P0510 arid P1447 are displayed, perform TROUBLE DIAGNOSIS FOR DTC P0510 first.




EVAPORATIVE EMISSION SYSTEM DIAGRAM

SYSTEM DESCRIPTION
In this evaporative emission (EVAP) control system, purge volume is related to air intake volume and occurs during non-closed throttle conditions. In normal purge conditions (non-closed throttle), the EVAP canister purge volume control valve and EVAP canister purge control valve are open to admit purge flow. Purge flow exposes the EVAP control system pressure sensor to intake manifold vacuum.




ON BOARD DIAGNOSIS LOGIC
In normal conditions (non-closed throttle), if the sensor output does not show the appropriate pressure drop in the EVAP purge line, lack of purge flow is indicated and a fault is determined.

DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE

CAUTION: Always drive vehicle at a safe 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 a 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 and let it idle for at least 50 seconds.







4) Select "PURG CN/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.)
CKPS.RPM (POS): 1,000 - 3,000 rpm
Vehicle speed: 30 - 100 km/h (19 - 62 MPH)
B/FUEL SCHDL: 1 - 4.5 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 "SELF DIAG 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.)
CKPS.RPM (POS): 1,000 - 3,000 rpm
Vehicle speed: 30 - 100 km/h (19 - 62 MPH)
B/FUEL SCHDL: 1 - 4.5 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 "SELF DIAG 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.)
CKPS.RPM (POS): 1,000 - 3,000 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 "SELF DIAG 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 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 (62) (EVAP control system pressure sensor signal) and (43) (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 0.1 V less than the value at idle speed for at least 1 second.







DIAGNOSTIC 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 30 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 and ensure the EVAP canister purge volume control valve shaft smoothly moves 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 30 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" and "OFF" and ensure the EVAP canister purge volume control valve shaft smoothly moves 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 inHg)]
Blow air in port (C) and ensure free flow out of port (B).

EVAP canister purge control solenoid valve







Check air passage continuity.
If NG, replace solenoid valve.

One-way valve







Check one-way valve air passage continuity.
If NG, replace one-way valve.

EVAP control system pressure sensor
1. Remove EVAP control system pressure sensor from bracket with its harness connector connected.







2. Remove hose from EVAP control system pressure sensor.
3. Apply vacuum and pressure to EVAP control system pressure sensor with pump as shown in figure.
4. Check output voltage between terminal (62) and (25) (ECM ground).

CAUTION:
- Do not apply below -20 kPa (-150 mmHg, -5.91 inHg) or over 20 kPa (150 mmHg, 5.91 inHg) of pressure.
- Always calibrate the vacuum pump gauge when using it.

5. If NG, replace EVAP control system pressure sensor.
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