Frontier XE King Cab 2WD V6-3.3L (VG33E) (2001)
Canister Purge Solenoid: All Technical Service Bulletins
EVAP System - Knocking Noise Just Above Idle
Classification:
EC01-033
Reference:
NTB02-020
Date:
February 18, 2002
1999-02 FRONTIER AND 2000-02 XTERRA
KNOCKING NOISE ABOVE IDLE (800-1100 RPM)
APPLIED VEHICLES:
1999-2002 Frontier (D22) with VG33E - NOT Supercharged
2000-2002 Xterra (D22) with VG33E - NOT Supercharged
SERVICE INFORMATION
If an applied vehicle exhibits the following symptom:
^
Slight noise that sounds like engine "knock" is heard just above engine idle speed (800-1100 rpm) with the engine under a slight load, and the noise
cannot be detected over 1100 rpm.
The cause may be normal pulsating noise coming from the EVAP purge solenoid valve and piping (in the engine compartment) transferring into the
passenger cabin.
However, use the Service Procedure in this bulletin to reduce the noise, if it should occur.
SERVICE PROCEDURE
1.
Start and run the engine for at least one minute.
2.
Use CONSULT-II to view the status of the "Closed Throttle Position Switch" (CTPS).
3.
Set the Parking Brake, then perform the following;
^
For vehicles with Automatic Transmission, with your foot on the brake, place the A/T gear selector in "D."
^
For vehicles with Manual Transmission, depress the clutch and select any gear.
4a.
While viewing CTPS status, open the throttle just enough to change the CTPS status from "On" to "Off."
NOTE:
This will allow the EVAP Purge Volume Control Solenoid Valve to begin operating.
4b.
Listen closely for a slight "knocking" noise. If "knocking" noise is heard;
1)
Put the transmission in "Neutral" (M/T) or "Park" (A/T).