Titan 2WD V8-5.6L (VK56) (2004)
Confirm Incident "Knock" Noise.
1.
Start the engine.
2.
Connect CONSULT-II to the vehicle and select [ENGINE] > [ACTIVE TEST] > [PURG VOL CONT/V] (EVAP canister purge volume control
solenoid valve).
3.
Press [Qu].
^
This will change PURG VOL CONT/V form 0% to 10% and allow it to begin operating.
4.
Listen closely for a slight "knocking" noise from the engine compartment.
^
If knocking noise is heard, go to step 5.
^
If knocking noise is not heard, this bulletin does not apply.
Determine if Knocking is Coming From EVAP Valve and Piping
5.
Press [Qd].
^
This will change PURG VOL CONT/V back to 0% and stop its operation.
6.
Listen again for "knocking" noise.
^
If you still hear this "knocking" noise, this bulletin does not apply. Go to ASIST for further diagnostic information.
^
If you don't hear the "knocking" noise, shut off the engine and go to step 7.
Install New EVAP Parts
NOTE:
If your vehicle already has the "new" style service port, this bulletin does not apply (see Figure 2).