necessary, the steering column assembly must be
replaced,(Refer to 19 - STEERING/COLUMN -
REMOVAL).
REMOVAL
IGNITION SWITCH REMOVAL
The ignition key must be in the key cylinder for
cylinder removal. The key cylinder must be removed
first before removing ignition switch.
(1) Remove key cylinder. Refer to previous steps.
(2) Remove lower steering column cover screws
and remove cover (Fig. 19).
(3) Remove ignition switch mounting screw (Fig.
17). Use tamper proof torx bit to remove the screw.
(4) Using a small screwdriver, push on locking tab
(Fig. 15) and remove switch from steering column.
(5) Disconnect two electrical connectors at rear of
ignition switch (Fig. 17).
INSTALLATION
IGNITION SWITCH INSTALLATION
The ignition key must be in the key cylinder for
cylinder removal. The key cylinder must be removed
first before removing ignition switch.(1) Before installing ignition switch, rotate the slot
in the switch to the ON position (Fig. 16).
(2) Connect two electrical connectors to rear of
ignition switch. Make sure that locking tabs are fully
seated into wiring connectors.
(3) Position switch to column and install tamper
proof screw. Tighten screw to 3 N´m (26 in. lbs.).
(4) Install steering column lower cover.
Fig. 15 Ignition Switch Lock Tab
1 - LOCK TAB
2 - IGNITION SWITCH
3 - SCREWDRIVER
Fig. 16 Switch In ON Position
1 - IGNITION SWITCH
2 - ROTATE TO ON POSITION
Fig. 17 Ignition Switch Removal/Installation
1 - TAMPER PROOF SCREW
2 - IGNITION SWITCH
3 - ELECTRICAL CONNECTORS
WJCOLUMN 19 - 13
IGNITION SWITCH (Continued)
Check the vapor/vacuum lines at the LDP, LDP
filter and EVAP canister purge solenoid for
damage or leaks. If a leak is present, a Diagnos-
tic Trouble Code (DTC) may be set.
(2) Connect electrical connector to LDP.
(3) While raising front section of support bracket,
connect LDP wiring clip (Fig. 20).
(4) Install 3 LDP mounting bolts (Fig. 19). Refer to
Torque Specifications.
(5) Join front and rear sections of two-piece sup-
port bracket by installing 3 bolts on bottom of sup-
port bracket (Fig. 17). Do not tighten bolts at this
time.
(6) Install support bracket brace bolt (Fig. 17). Do
not tighten bolt at this time.
(7) Tighten 2 support bracket nuts at frame rail
(Fig. 19). Refer to Torque Specifications.
(8) Tighten 3 support bracket bolts and brace bolt.
Refer to Torque Specifications.
(9) Position stone shield behind left/rear wheel
(Fig. 18). Install new plastic rivets.
ORVR
DESCRIPTION
The ORVR (On-Board Refueling Vapor Recovery)
system consists of a unique fuel tank, flow manage-
ment valve, fluid control valve, one-way check valve
and vapor canister. Certain ORVR components can be
found in (Fig. 1).
OPERATION
The ORVR (On-Board Refueling Vapor Recovery)
system is used to remove excess fuel tank vapors.
This is done while the vehicle is being refueled. Cer-
tain ORVR components can be found in (Fig. 1).
Fuel flowing into the fuel filler tube (approx. 1º
I.D.) creates an aspiration effect drawing air into the
fuel fill tube. During refueling, the fuel tank is
vented to the EVAP canister to capture escaping
vapors. With air flowing into the filler tube, there are
no fuel vapors escaping to the atmosphere. Once the
refueling vapors are captured by the EVAP canister,
the vehicle's computer controlled purge system draws
vapor out of the canister for the engine to burn. The
vapor flow is metered by the purge solenoid so that
there is no, or minimal impact on driveability or
tailpipe emissions.As fuel starts to flow through the fuel fill tube, it
opens the normally closed check valve and enters the
fuel tank. Vapor or air is expelled from the tank
through the control valve and on to the vapor canis-
ter. Vapor is absorbed in the EVAP canister until
vapor flow in the lines stops. This stoppage occurs
following fuel shut-off, or by having the fuel level in
the tank rise high enough to close the control valve.
This control valve contains a float that rises to seal
the large diameter vent path to the EVAP canister.
At this point in the refueling process, fuel tank pres-
sure increases, the check valve closes (preventing liq-
uid fuel from spiting back at the operator), and fuel
then rises up the fuel filler tube to shut off the dis-
pensing nozzle.
PCV VALVE
DIAGNOSIS AND TESTING - PCV VALVE/PCV
SYSTEM - 4.7L
(1) Disconnect PCV line/hose (Fig. 21) by discon-
necting rubber connecting hose at PCV valve fitting.
(2) Remove PCV valve at oil filler tube by rotating
PCV valve downward until locating tabs have been
freed at cam lock (Fig. 21). After tabs have cleared,
pull valve straight out from filler tube.To prevent
damage to PCV valve locating tabs, valve must
be pointed downward for removal. Do not force
valve from oil filler tube.
(3) After valve is removed, check condition of valve
o-ring (Fig. 21). Also, PCV valve should rattle when
shaken.
(4) Reconnect PCV valve to its connecting line/
hose.
(5) Start engine and bring to idle speed.
(6) If valve is not plugged, a hissing noise will be
heard as air passes through valve. Also, a strong vac-
uum should be felt with a finger placed at valve
inlet.
(7) If vacuum is not felt at valve inlet, check line/
hose for kinks or for obstruction. If necessary, clean
out intake manifold fitting at rear of manifold. Do
this by turning a 1/4 inch drill (by hand) through the
fitting to dislodge any solid particles. Blow out the
fitting with shop air. If necessary, use a smaller drill
to avoid removing any metal from the fitting.
WJEVAPORATIVE EMISSIONS 25 - 37
LEAK DETECTION PUMP (Continued)
