Jeep Wrangler TJ. Manual - part 477
When steering pump pressure exceeds 5860 kPa ±
690 kPa (850 psi ± 100 psi), the normally closed
switch will open and the PCM will increase the
engine idle speed. This will prevent the engine from
stalling.
When pump pressure drops to approximately 1379
kPa (200 psi), the switch circuit will re-close and
engine idle speed will return to its previous setting.
REMOVAL
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. 5).
(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
This switch is not used with 4.0L six-cylinder
engines.
(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.
(5) Start engine and again check power steering
fluid. Add fluid if necessary.
PULLEY
REMOVAL
CAUTION: On vehicles equipped with the 4.0L, Do
not reuse the old power steering pump pulley it is
not intended for reuse. A new pulley must be
installed if removed.
(1) Remove pump assembly.
(2) Remove pulley from pump with Puller C-4333
or equivalent puller (Fig. 6).
INSTALLATION
NOTE: The pulley is marked front for installation.
CAUTION: On vehicles equipped with the 4.0L, Do
not reuse the old power steering pump pulley it is
not intended for reuse. A new pulley must be
installed if removed.
(1) Replace pulley if bent, cracked, or loose.
(2) Install pulley on pump with Installer C-4063-B
or equivalent installer (Fig. 7). The pulley must be
flush with the end of the shaft. Ensure the tool and
pulley are aligned with the pump shaft.
(3) Install pump assembly.
(4) With Serpentine Belt, run engine until warm (5
min.) and note any belt chirp. If chirp exists, move
pulley outward approximately 0.5 mm (0.020 in.). If
noise increases, press on 1.0 mm (0.040 in.). Be
careful that pulley does not contact mounting
bolts.
Fig. 6 Pulley Removal
1 - POWER STEERING PUMP DRIVE PULLEY
2 - SPECIAL TOOL C-4333
Fig. 7 Pulley Installation
1- POWER STEERING PUMP DRIVE PULLEY
2 - SPECIAL TOOL C-4063-B
TJ
PUMP
19 - 25
POWER STEERING PRESSURE SWITCH (Continued)