Emissions System - MIL ON/DTC's Stored (EVAP)

Classification:
EC98-007B

Reference:
NTB98-058B

Date:
August 7, 2001

MIL "ON" WITH EVAP SYSTEM DTCs STORED DUE TO LAUNCHING A WATERCRAFT

ATTENTION:
This bulletin amends NTB98-058A. Applied Vehicle information has been expanded and Parts Information has been revised. Please discard all paper copies of NTB98-058A.

APPLIED VEHICLES:
1996-1997 Truck (D21)
1998-2001 Frontier (D22)

SERVICE INFORMATION

If an applied vehicle is used to launch watercraft and exhibits the following symptoms:

1. The EVAP canister is found to have water in it and

2. It has one or more of the following DTC codes stored in Self Diagnosis:

^ P0440 (EVAP-small leak)

^ P1440 (EVAP-small leak) D22 only

^ P0446 (EVAP canister vent control valve)

^ P1446 (EVAP canister vent control valve-stuck closed) D22 only

^ P1448 (EVAP canister vent control valve-stuck open) D22 only

^ P0450 (EVAP pressure sensor)

^ P0443 (EVAP purge control valve & solenoid valve)

^ P1445 (EVAP purge volume control valve) D21 only

^ P1444 (EVAP purge volume control solenoid valve) D22 only

Use the Service Procedure provided in this bulletin to replace the EVAP canister and install the replacement EVAP breather tube kit to prevent water/mud/dirt entry into the EVAP system.

SERVICE PROCEDURE

1. Connect CONSULT-II.

2. From the Engine menu, select Self Diag Results.

3. Touch PRINT. Then select FF Data and touch PRINT again.

4. Use the appropriate service manual to resolve the stored DTC.

5. To determine if there is damage to the EVAP system, proceed to Removal and Inspection Testing.

6. Then go to Installation of the Breather Tube Kit and Installation of the EVAP system.

Removal and Inspection Testing

1. Remove the spare tire.

2. Remove the EVAP canister.

3. Remove the hose between the EVAP vent control valve and the crossframe member (the largest diameter hose in the rearward position).

4. Check the EVAP control valve. Air should pass through the valve passage when voltage is not applied.





A. Apply battery voltage to the valve and make sure the air passage closes (see Figure 1).

B. Disconnect the battery voltage and make sure the air passage opens again and does not stick closed.

C. Look inside the valve air passage and make sure there is no corrosion/rust on the metal shaft.

5. Check the EVAP canister.

A. Check that no liquid will drain from the EVAP canister.

B. Weigh the canister (with the vent control valve). The weight should be less than 4 lbs.

6. If either the EVAP vent control valve or the EVAP canister fail one or more of these checks, replace both the vent control valve and the canister (see Parts Information).

Installation of the Breather Tube Kit

1. Remove the bedliner (if so equipped)





2. Drill one 25 mm (1 inch) hole in the floor of the vehicle bed at the location shown (see Figure 2).





3. Directly above this 25 mm hole, drill one 8 mm (0.31 in.) hole in the inside edge of the vehicle bed rail (see Figure 3).

4. Deburr both drilled holes and coat the bare metal surfaces with an anti-corrosive paint.

5. Install the rubber grommet (from the kit) into the 25 mm drilled hole.





6. Install the metal breather tube into the grommet and fasten the upper plastic bracket to the bed rail through the 8 mm drilled hole with the bolt and nut from the kit (see Figure 4).

Installation of the EVAP System

1. Install the EVAP canister.

2. Install the EVAP vent control valve.

3. Reconnect the two small diameter original hoses to the canister.

4. Reconnect the vent control valve electrical harness.





5. Install the new hose between the vent control valve and the metal breather tube (see Figure 5).

6. Reinstall the spare tire.

7. If equipped, reinstall the bedliner.





PARTS INFORMATION





CLAIMS INFORMATION