Power Steering Pressure Switch-2.5L Engine; Oxygen Sensor - Jeep cherokee 2000 Service Manual

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REMOVAL AND INSTALLATION (Continued)
Fig. 31 PCM Mounting
1 – PCM
2 – L. F. FENDER
3 – PCM MOUNTING BOLTS (3)
(4) Install three 32–way connectors.
(5) Install cover over electrical connectors. Cover
snaps onto PCM.
(6) Install battery cable.
(7) Use the DRB scan tool to reprogram new PCM
with vehicles original Identification Number (VIN)
and original vehicle mileage.
POWER STEERING PRESSURE SWITCH—2.5L
ENGINE
This switch is not used with 4.0L six-cylinder
engines.
The power steering pressure switch is installed in
the power steering high-pressure hose (Fig. 32).
REMOVAL
(1) Disconnect electrical connector from power
steering pressure switch.
(2) Place a small container or shop towel beneath
switch to collect any excess fluid.
(3) Remove switch. Use back-up wrench on power
steering line to prevent line bending.
INSTALLATION
(1) Install power steering switch into power steer-
ing line.
(2) Tighten to 14–22 N·m (124–195 in. lbs.) torque.
(3) Connect electrical connector to switch.
(4) Check power steering fluid and add as neces-
sary.
Fig. 32 Power Steering Pressure Switch
1 – POWER STEERING PRESSURE SWITCH
2 – ELECTRICAL CONNECTOR
3 – POWER STEERING PUMP
(5) Start engine and again check power steering
fluid. Add fluid if necessary.

OXYGEN SENSOR

REMOVAL
Never apply any type of grease to the oxygen
sensor electrical connector, or attempt any sol-
dering of the sensor wiring harness. For sensor
operation, it must have a comparison source of
oxygen from outside the exhaust system. This
fresh air is supplied to the sensor through its
pigtail wiring harness.
Refer to (Fig. 33), (Fig. 34), (Fig. 35) or (Fig. 36) for
O2S (oxygen sensor) location.
WARNING: THE EXHAUST MANIFOLD, EXHAUST
PIPES AND CATALYTIC CONVERTER BECOME
VERY HOT DURING ENGINE OPERATION. ALLOW
ENGINE TO COOL BEFORE REMOVING OXYGEN
SENSOR.
(1) Raise and support vehicle.
(2) Disconnect wire connector from O2S sensor.
CAUTION: When disconnecting sensor electrical
connector, do not pull directly on wire going into
sensor.
(3) Remove O2S sensor with an oxygen sensor
removal and installation tool.
(4) Clean threads in exhaust pipe using appropri-
ate tap.
FUEL SYSTEM 14 - 47