Service Procedure
Refer to Repair Flow Charts A and B shown to determine the diagnosis and repair of the vehicle.
Oxygen Sensor Kit Installation Procedure
1. Determine the production date of the vehicle.
A. If the vehicle was produced before 6/96, install oxygen sensor kit P/N 22690-40U25 using the following steps.
B. If the vehicle was produced 6/96 or later, install oxygen sensor kit P/N 226A0-49U25 using the following steps.
NOTE:
There is a difference between the rear oxygen sensors depending on the production date of the vehicle. The difference is the size of the rubber grommet (see Figure 1).
2. Install the new front and rear oxygen sensors (supplied in the kit) as follows:
A. Remove the two front (B1 & B2) and one rear oxygen sensors from the vehicle's exhaust system (see Figure 2).
B. Install new oxygen sensors to the exhaust system (see Figure 2).
C. Tighten the two front oxygen sensors to 40 - 60 N.m (4.1 - 6.1 kg-m, 30 - 44 ft-lb) and tighten the rear oxygen sensor to 18 - 24 N.m (1.8 - 2.4 kg-m, 13 - 17 ft-lb).
EVAP Vent Control Valve Inspection Procedure
1. Inspect the EVAP vent control valve as follows:
A. Apply battery voltage to the vent control valve and look into the hose end of the valve to make sure the air passage closes (see Figure 3).
NOTE:
The valve must function (click) on the first application of battery voltage.
B. While looking into the hose end of the EVAP vent control valve, disconnect the battery and make sure the air passage opens immediately (the valve should not stick closed).
C. Look inside the valve hose end and make sure there is no corrosion or rust on the metal shaft. Also verify there is no sand, spiders or other debris in the air passage.
D. Replace the EVAP vent control valve if it fails one or more of the above checks. Refer to "EVAP Components Information" to determine which EVAP vent control valve to install.
EVAP Canister Inspection Procedure
1. Remove the EVAP canister with the EVAP vent control valve attached.
2. Inspect the EVAP canister as follows:
A. Verify that no water drains from the canister.
B. Confirm the canister with the vent control valve attached weighs less than 5 lbs. (2.3 kg.).
C. Replace the canister if it fails either of the above checks. Refer to "EVAP Components Information" to determine the correct canister to install.
NOTE:
Do not install the EVAP canister at this time.
EVAP Components Information
EVAP Vent Control Valve (if determined "NG" from flow charts shown)
1. If the old EVAP vent control valve matches the "TYPE A" style valve replace it with valve P/N 14935-54U06.
NOTE:
If the metal threaded inserts in the body of the EVAP canister become loose when removing the EVAP vent control valve mounting bolts, replace both the EVAP vent control valve and EVAP canister with "TYPE B" style components (canister P/N 14950-56U18, vent control valve P/N 14935-54U04).
2. If the old EVAP vent control valve matches the "TYPE B" style valve replace it with valve P/N 14935-54U04.
NOTE:
If the metal threaded inserts in the body of the EVAP canister become loose when removing the EVAP vent control valve mounting bolts, replace the EVAP canister with a "TYPE B" style component P/N 14950-56U18.
EVAP Canister (if determined "NG" from flow charts)
1. If the old canister matches the "TYPE A" as shown style canister, both the canister and vent control valve must be replaced as a set with "TYPE B" style components (canister P/N 14950-56U18, vent control valve P/N 14935-54U04).
2. If the old canister matches the "TYPE B" style canister, replace it with canister P/N 14950-56U18.
Water Separator Kit installation Procedure (not required on vehicles built after 3/12/96)
1. Install the water separator kit as follows:
A. Remove and discard the EVAP canister bracket ONLY (see Figure 5). Save the EVAP canister and bracket bolts for re-installation.
B. Remove and discard the breather valve and hose (see Figure 6).
C. Position the white alignment marks as shown to correctly assemble the new EVAP canister vent hoses, water separator and vent hose connector to the new EVAP canister bracket (see Figure 7).
D. Use the existing bolts and install the new canister bracket on the vehicle.
E. Insert the vent hose connector into the existing hole in the vehicle rear panel (see Figure 8).
F. Use the existing bolts to install the EVAP canister with vent control valve on to the new canister bracket.
G. Connect the EVAP hoses to the canister in the same position as they were removed.
H. Re-connect the vehicle harness to the EVAP vent control valve.
Quality Control Check
1. Make sure all removed components are correctly reinstalled.
2. Verify all hoses/connections are correctly installed and free of leaks.
3. Use CONSULT to check/erase any stored DTC(s).
4. Attach CONSULT Self Diagnosis printout to repair order.