1993 CHEVROLET PLYMOUTH ACCLAIM belt

(4) Verify vacuum connection at Purge Solenoid is
secure and not leaking (Fig. 3).
(5) Verify the electrical connector is attached to
the MAP sensor (Fig. 4). (6) Check MAP sensor hose at MAP Sensor Assem-
bly (Fig. 4), and at Vacuum Connection at Intake
Plenum Fitting.
(7) Check generator wiring connections. Ensure
the accessory drive belt has proper tension. (8) Verify hoses are securely attached to the vapor
canister (Fig. 5). (9) Verify the engine ground strap is attached at
the engine and dash panel (Fig. 6). (10) Ensure the heated oxygen sensor connector is
connected to the harness connector (Fig. 6). (11) Verify the distributor connector is connected
to the harness connector (Fig. 7). (12) Verify the coolant temperature sensor connec-
tor is connected to the harness connector (Fig. 8). (13) Check vacuum hose connection at fuel pres-
sure regulator and intake plenum connector (Fig. 8).
Fig. 3 Duty Cycle EVAP Canister Purge Solenoid
Fig. 4 Map Sensor Electrical and Vacuum Connections
Fig. 5 Vapor Canister
Fig. 6 Oxygen Sensor Connector
Fig. 7 Distributor Connector
14 - 126 FUEL SYSTEMS Ä

(25) Check the heated oxygen sensor electrical con-
nector for damage (Fig. 14). (26) Inspect the generator wiring connections for
damage. (27) Check the accessory drive belt tension.
(28) Check the 60-way electrical connection at the
PCM (Fig. 15) for damage or spread terminals. Ver-
ify that the 60-way connector is fully inserted into
the PCM socket. Ensure the wires are not stretched
or pulled out of the connector.
(29) Check for full insertion of the relays in the
power distribution center (Fig. 16).
(30) Check battery cable connections.
(31) Check the power brake booster hose connec-
tion (without Anti-lock Brake Systems) (Fig. 17). (32) Check the speed control vacuum connection
(Fig. 18). (33) Inspect hose and wiring connections at fuel
pump. Check that wiring connector is making con-
tact with terminals on pump.
Fig. 12 PCV System
Fig. 13 Crankshaft Position Sensor and Vehicle Speed Sensor
Fig. 14 MAP Sensor and Heated Oxygen Sensor
Fig. 15 Powertrain Control Module (PCM)
Fig. 16 Power Distribution Center
14 - 160 FUEL SYSTEMS Ä

is made with the camshaft gear. While holding the
sensor in this position, install and tighten the retain-
ing bolt 12 N Im (105 in. lbs.) torque.
(2) Connect camshaft position sensor electrical con-
nector to harness connector. Position connector away
from the accessory belt.
HEATED OXYGEN SENSOR (O2SENSOR) SERVICE
The oxygen sensor is installed in the exhaust mani-
fold (Fig. 27).
CAUTION: Do not pull on the oxygen sensor wire
when disconnecting the electrical connector.
WARNING: THE EXHAUST MANIFOLD MAY BE EX-
TREMELY HOT. USE CARE WHEN SERVICING THE
OXYGEN SENSOR.
(1) Disconnect oxygen sensor electrical connector
(Fig. 28). (2) Remove sensor using Tool C-4907 (Fig. 29).
Slightly tightening the sensor can ease removal. When the sensor is removed, the exhaust manifold
threads must be cleaned with an 18 mm X 1.5 + 6E tap.
If using original sensor, coat the threads with Loctite
771-64 anti-seize compound or equivalent. New sen-
sors are packaged with compound on the threads and
do not require additional compound. The sensor must
be tightened to 27 N Im (20 ft. lbs.) torque.
Fig. 27 Oxygen SensorÐ3.3L Engine
Fig. 28 Oxygen Sensor Connector
Fig. 29 Oxygen Sensor Socket
Ä FUEL SYSTEMS 14 - 177

STEERING
CONTENTS
page page
ACUSTAR STANDARD AND TILT STEERING COLUMN ............................ 28
AUTOMATIC TRANSMISSION SHIFTER/IGNITION INTERLOCK .......................... 36
GENERAL INFORMATION .................. 1 POWER STEERING GEAR
................ 25
POWER STEERING PUMPS ................ 1
SPECIFICATIONS AND TIGHTENING REFERENCE .......................... 42
GENERAL INFORMATION
Safety goggles should be worn at all times
when working on any steering gear or pump. Throughout this group, references may be made to
a particular vehicle by letter or number designation.
A chart showing the breakdown of these designations
is included in the Introduction Section at the front of
this service manual. The power steering system consists of these four
major components. Power Steering Pump, Power
Steering Gear, Pressure Hose, and Return Line.
Turning of the steering wheel is converted into lin-
ear travel through the meshing of the helical pinion teeth with the rack teeth. Power assist steering is
provided by an open center, rotary type control valve.
It is used to direct oil from the power steering pump
to either side of the integral steering rack piston. Road feel is controlled by the diameter of a torsion
bar which initially steers the vehicle. As steering ef-
fort increases as in a turn, the torsion bar twists,
causing relative rotary motion between the rotary
valve body and valve spool. This movement directs
oil behind the integral rack piston, which in turn,
builds up hydraulic pressure and assists in the turn-
ing effort.
POWER STEERING PUMPS
INDEX
page page
Checking Power Steering Fluid Level .......... 9
Flow Control Valve Fitting O-Ring Seal ........ 23
General Information ........................ 1
Power Steering Hoses ..................... 11
Power Steering Pressure Switch ............. 10
Power Steering Pump Fluid Reservoirs ........ 22 Power Steering Pump Pressure Test
........... 9
Power Steering Pump Pulley Service .......... 20
Power Steering Pump Removal .............. 12
Power Steering Pump Service ................ 2
Power Steering PumpÐInitial Operation ....... 24
Steering Components Service Diagnosis ........ 2
GENERAL INFORMATION
Hydraulic pressure for operation of the power
steering gear is provided by a belt driven power
steering pump. The power steering pump is a con-
stant flow rate and displacement, vane type pump.
Different styles of Saginaw power steering pumps are
used depending on the engine application of the ve-
hicle. On all four cylinder and 3.0-liter V-6 applications
the Saginaw Ham Can power steering pump is used
(Fig. 1). On the 3.3 & 3.8-liter V-6 and Turbo III applica-
tions, different versions of the Saginaw T/C style
power steering pump is used (Fig. 2). The 3.3 & 3.8 liter V-6 engine application uses the T/C style power
steering pump with a remote mounted reservoir for
the power steering fluid. On the Turbo III application
of the T/C style power steering pump, the power
steering fluid reservoir is integral to the power steer-
ing pump. On the integral reservoir type pump (Fig. 1) the
pump housing and internal components are combined
with the reservoir to form a one-piece mechanism. The Saginaw T/C style power steering pump (Fig.
2), consists of the power steering pump internal com-
ponents and pump housing. The Saginaw T/C style
power steering pump though has no internal reser-
voir for the power steering fluid. Depending on vehi-
Ä STEERING 19 - 1

cle and or engine application the Saginaw T/C style
power steering pump is used on, it will be equipped
with a plastic integral or remote mounted power
steering fluid reservoir. Drive tangs on the power steering gear pinion, mate
loosely with the stub shaft of the steering gear. This
will allow manual steering control to be maintained, if
the drive belt on the power steering pump should
break. However, under these conditions, steering effort
will significantly increase.
STEERING COMPONENTS SERVICE DIAGNOSIS
POWER STEERING PUMP SERVICE
The service procedures for the Saginaw power steer-
ing pump are limited to the areas and components
listed below. No repair procedures are to be done
on internal components of the Saginaw power
steering pumps.
² Repair of power steering fluid leaks from areas of
the power steering pump sealed by O-rings is allowed
(See Pump Leak Diagnosis). However power steering
pump shaft seal leakage will require replacement of
the pump.
² Power steering fluid reservoirs, related components
and attaching hardware.
² Power steering fluid reservoir filler cap/dipstick as-
semblies. Because of unique shaft bearings, flow control levels
or pump displacements, power steering pumps may be
used only on specific vehicle applications. Be sure that
all power steering pumps are only replaced with a
pump that is the correct replacement for that specific
application. Hydraulic pressure is provided for operation of the
power steering gear by the belt driven power steering
pumps (Fig . 1 & 2). It is a constant displacement, vane
type pump. The power steering pump is connected to
the steering gear by a power steering fluid pressure
hose and return hose.
Rectangular pumping vanes in the shaft driven rotor,
move power steering fluid from the intake to the cam ring
pressure cavities of the power steering pump. As the rotor
begins to turn, centrifugal force throws the vanes against
the inside surface of the cam ring to pickup residual oil.
This oil is then forced into the high pressure area. As more
oil is picked up by the vanes. That additional oil is forced
into the cavities of the thrust plate through two crossover
holes in the cam ring and pressure plate. The crossover
holes empty into the high pressure area between the
pressure plate and the housing end cover.
As the high pressure area is filled, oil flows under
the vanes in the rotor slots, forcing the vanes to follow
the inside surface of the cam ring. As the vanes
reach the restricted area of the cam ring, oil is
forced out from between the vanes. When excess oil
flow is generated during high-speed operation, a regu-
lated amount of oil returns to the pump intake side
through a flow control valve. The flow control valve
reduces the power required to drive the pump
and holds down temperature build-up.
Fig. 1 Saginaw Ham Can Power Steering Pump
Fig. 2 Saginaw T/C Style Power Steering Pump
19 - 2 STEERING Ä

When steering conditions exceed maximum pres-
sure requirements, such as when the wheels are
turned against the stops. The pressure built up in
the steering gear exerts pressure on the spring end of
the flow control valve. The high pressure lifts the re-
lief valve ball from its seat and allows oil to flow
through a trigger orifice located in the outlet fitting.
This reduces pressure on the spring end of the flow
control valve which then opens and allows the oil to
return to the intake side of the pump. This action
limits maximum pressure output of the pump to a
safe level. Under normal power steering pump operating con-
ditions, pressure requirements of the pump are below
maximum, causing the pressure relief valve to re-
main closed.
CHECKING POWER STEERING FLUID LEVEL
WARNING: FLUID LEVEL SHOULD BE CHECKED
WITH ENGINE OFF TO PREVENT INJURY FROM
MOVING PARTS. DO NOT USE AUTOMATIC TRANS-
MISSION FLUID IN THE POWER STEERING SYS-
TEM. DO NOT OVERFILL THE POWER STEERING
SYSTEM.
Wipe reservoir filler cap free of dirt, before check-
ing power steering fluid level. The dipstick should in- dicate FULL COLD when fluid is at normal ambient
temperature, approximately 21ÉC to 27ÉC (70ÉF to
80ÉF). In all pumps add fluid as necessary to obtain
proper level, using only MopartPower Steering
Fluid, or equivalent. DO NOT USE ANY TYPE
OF AUTOMATIC TRANSMISSION FLUID.
POWER STEERING PUMP PRESSURE TEST
The following procedure can be used to test the op-
eration of the power steering system on the vehicle. (1) Check power steering pump drive belt tension
and adjust as necessary. (2) Disconnect power steering fluid pressure hose,
at steering gear or power steering pump. Use a con-
tainer for dripping fluid. (3) Connect Pressure Gauge, Special Tool C-3309-E
(Fig. 1) to both hoses using adapter fittings. Connect
spare pressure hose to gear or pump. (4) Completely open valve on Special Tool
C-3309-E (Fig. 1). (5) Start engine and let idle.
(6) Check power steering fluid level, and add fluid
as necessary. (7) Gauge should read below 862 kPa (125 psi), if
above, inspect the hoses for restrictions and repair as
necessary. The initial pressure should be in the
range of 345-552 kPa (50-80 psi).
PUMP LEAKAGE DIAGNOSIS
Ä STEERING 19 - 9

(2) Using a lint free towel, wipe clean open power
steering hose ends, power steering pump and steer-
ing gear ports. (3) Install new O-rings or sealing washers on the
ends of the power steering hoses. Lubricate O-rings
or sealing washers using clean power steering fluid. (4) Attach power steering hose to proper connec-
tions at power steering pump and steering gear. Cor-
rectly route power steering hoses avoiding tight
bends or kinking of the hose. Install power steering hose to crossmember routing bracket.
Hoses must
remain away from exhaust system, vehicle com-
ponents and unfriendly surfaces causing pos-
sible damage to power steering hoses. (5) Tighten all fasteners shown for specific applica-
tions in (Fig. 1 to 4) to their correct torques listed
below:
² Pump End Banjo Bolt Ð 34 N Im (25 ft. lbs.)
² Pump End Tube Nut Ð 34 N Im (25 ft. lbs.)
² Gear End Tube Nuts (2) Ð 34 N Im (25 ft. lbs.)
² Crossmember Bracket Bolt Ð 23 N Im (17 ft. lbs.)
² Pump Bracket Nut Ð 40 N Im (30 ft. lbs.)
² Gear Bracket Bolt Ð 68 N Im (50 ft. lbs.)
(6) Install vehicle's wiring harness connector (if ap-
plicable to vehicle being serviced) onto the power
steering pressure switch (Fig .1&2).
(7) When used, protective sponge sleeves must be
properly positioned on power steering hoses. This is to
prevent hose contact with other components. (8) After hose is installed, check for leaks. (See
Pump Installation).
POWER STEERING PUMP REMOVAL
WARNING: POWER STEERING OIL, ENGINE COMPO-
NENTS AND EXHAUST SYSTEM MAY BE EX-
TREMELY HOT IF ENGINE HAS BEEN RUNNING. DO
NOT START ENGINE WITH ANY LOOSE OR DISCON-
NECTED HOSES, OR ALLOW HOSES TO TOUCH HOT
EXHAUST MANIFOLD OR CATALYST.
2.2 & 2.5 LITER
REMOVE
(1) Remove battery cable from (-) negative post on
battery and isolate cable. (2) Loosen power steering pump adjustment bolt
and rotate power steering pump forward in bracket.
Remove power steering pump drive belt from power
steering pump (Fig. 1). It is not necessary to remove
power steering pump drive belt from engine. (3) Raise vehicle See Hoisting, Group 0. Remove
hose clamp and low pressure fluid hose from power
steering pump (Fig. 2). (4) Remove power steering fluid pressure line (Fig.
2) from power steering pump. Drain excess power
steering fluid from line. (5) Loosen but do not remove nut, holding back of
power steering pump to its mounting bracket (Fig. 3).
Then remove bolt attaching pulley side of power steer-
ing pump to the mounting bracket (Fig. 3). (6) Lower Vehicle. Then remove bolt, retaining
power steering pump in adjusting slot of power steer-
ing pump mounting bracket (Fig. 3). (7) Remove power steering pump from top of engine
compartment, using the following procedure.
Lifting power steering pump out of mounting
Fig. 5 Power Steering Hose Routing 3.3 & 3.8L
Fig. 6 Power Steering Hose Routing Turbo III
19 - 12 STEERING Ä

bracket, rotating pump 90É and remove it out be-
tween engine and dash panel.(8) Transfer required parts from removed power
steering pump, to replacement power steering pump.
INSTALL
(1) Install power steering pump back in vehicle in
the reverse order of removal. (2) Install power steering pump back on mounting
bracket, being sure stud on back of power steering
pump is in slotted hole in mounting bracket. Install bolt attaching power steering pump to adjusting slot
in bracket (Fig. 3),
but do not tighten nut or bolt.
(3) Raise vehicle See Hoisting, Group 0.
(4) Install bolt attaching pulley side of power
steering pump to power steering pump mounting
bracket (Fig. 3). Do not fully tighten power steer-
ing pump mounting bolts at this time. (5) Install power steering fluid pressure line into
output fitting on power steering pump (Fig. 2).
Torque power steering pressure line tube nut to 31
N Im (275 in. lbs.). Before connecting pressure line
to power steering pump inspect O-ring on pres-
sure line for damage and replace if required. (6) Install power steering fluid, low pressure re-
turn hose on power steering pump low pressure fit-
ting (Fig. 2). Install hose clamp on low pressure
return hose, being sure hose clamp is installed on
hose past upset bead on power steering pump tube. (7) Lower vehicle.
(8) Install power steering pump drive belt on
power steering pump pulley. Using power steering
pump adjusting bracket (Fig. 1), rotate pump in
bracket to obtain correct belt tension. Tighten bolt at
power steering pump mounting bracket adjusting slot
(Fig. 1) to 54 N Im (40 ft. lbs.). Torque the power
steering pump to mounting bracket pivot, nut and
bolt (Fig. 1) to 54 N Im (40 ft. lbs.).
CAUTION: Do not use automatic transmission fluid
in power steering system. Only use Mopar T, Power
Steering Fluid, or equivalent.
(9) Fill power steering pump reservoir to correct
fluid level.
Fig. 1 Power Steering Pump Drive Belt Removal
Fig. 2 Power Steering Fluid Hoses
Fig. 3 Power Steering Pump Remove And Install
Ä STEERING 19 - 13