1988 JEEP CHEROKEE light

relay transmission oil oil additives lug pattern transmission set clock

Page 94 of 1378

$JEEP CHEROKEE 1988 Service Repair Manual \ \b\ \ \ \ \ \ g grams$

\
\b\
\
\
\
\
\

g grams

GND or GRND Ground

GRN Green

GRY Gray

Ga. Gauge

Gals. gallons

Gov. Governor

\
\
\
\
\
\
\
\f

"H" ABBREVIATION TABLE
"H" ABBREVIATION TABLE\
\
\
\
\
\
\

ABBREVIATION DEFINITION

\
\b\
\
\
\
\
\

H/D Heavy Duty

HAC High Altitude Compensation

HC Hydrocarbons

HEDF High Speed Electro Drive Fan relay or circuit

HEGO Heated Exhaust Gas Oxygen Sensor

HEGOG HEGO Ground circuit

HEI High Energy Ignition

HLDT Headlight

HO High Output

HP High Performance

HSC High Swirl Combustion

HSO High Specific Output

HTR Heater

HVAC Heating

Headlt. Headlight

Hg Mercury

Hgt. Height

Htr. Heater

Hz Hertz (Cycles Per Second)

\
\
\
\
\
\
\
\f

"I" ABBREVIATION TABLE
"I" ABBREVIATION TABLE\
\
\
\
\
\
\

ABBREVIATION DEFINITION

\
\b\
\
\
\
\
\

I.D. Inside Diameter

IAC Idle Air Control

IACV Idle Air Control Valve

IC Integrated Circuit

ID Identification

IDM Ignition Diagnostic Monitor

IGN Ignition system or circuit

ILC Idle Load Compensator

In. Hg Inches of Mercury

INCH Lbs. Inch Pounds

INFL REST Inflatable Restraint

INJ Injector or Injection

IP Instrument Panel

IPC Instrument Panel Cluster

ISA Idle Speed Actuator

ISC Idle Speed Control

ISS Idle Stop Solenoid

ITS Idle Tracking Switch

IVSV Idle Vacuum Switching Valve

Page 95 of 1378

JEEP CHEROKEE 1988 Service Repair Manual Ign. Ignition

In. Inches

Inj. Injector

Ign. Ignition

In. Inches

Inj. Injector

\
\
\
\
\
\
\
\f

"J" ABBREVIATION TABLE
"J" ABBREVIATION TABLE\
\
\
\
\
\
\

ABBREVIATION DEFINITION

\
\b\
\
\
\
\
\

J/B Junction Block

\
\
\
\
\
\
\
\f

"K" ABBREVIATION TABLE
"K" ABBREVIATION TABLE\
\
\
\
\
\
\

ABBREVIATION DEFINITION

\
\b\
\
\
\
\
\

k/ohms 1000 ohms (kilo as in k/ohms)

kg Kilograms (weight)

kg/cm Kilograms Per Square Centimeter

KAM Keep Alive Memory

KAPWR Keep Alive Power

KM/H Kilometers Per Hour

KOEO Key On Engine Off

KOER Key On Engine Running

KS Knock Sensor

\
\
\
\
\
\
\
\f

"L" ABBREVIATION TABLE
"L" ABBREVIATION TABLE\
\
\
\
\
\
\

ABBREVIATION DEFINITION

\
\b\
\
\
\
\
\

L Liter(s)

L/D Light Duty

LCD Liquid Crystal Display

LED Light Emitting Diode

LH Left Hand

LOS Limited Operation Strategy

LT BLU Light Blue

LT GRN Light Green

LUS Lock-Up Solenoid

Lbs. Pounds

Lt(s). Light(s)

Lugg. Luggage

\
\
\
\
\
\
\
\f

"M" ABBREVIATION TABLE
"M" ABBREVIATION TABLE\
\
\
\
\
\
\

ABBREVIATION DEFINITION

\
\b\
\
\
\
\
\

mA Milliamps

mV Millivolts

mfd. Microfarads

Page 96 of 1378

JEEP CHEROKEE 1988 Service Repair Manual mm Millimeters

M/T Manual Transaxle or Transmission

MA PFI Mass Air Sequential Port Fuel Injecti

mm Millimeters

M/T Manual Transaxle or Transmission

MA PFI Mass Air Sequential Port Fuel Injection system

MA or MAF Mass Airflow

MAF Mass Air Flow sensor

MAFS Mass Airflow Sensor

MAP Manifold Absolute Pressure sensor

MAT Manifold Air Temperature

MCU Microprocessor Control Unit

MCV Mixture Control Valve

MEM-CAL Memory Calibration Chip

MFI Multiport Fuel Injection

MIL Malfunction Indicator Light

MLP Manual Lever Position

MPFI Multi Point Fuel Injection

MPH Miles Per Hour

MPI Multi-Point (Fuel) Injection

Man. Manual

Mech. Mechanical

Mem. Memory

Mtr. Motor

\
\
\
\
\
\
\
\f

"N" ABBREVIATION TABLE
"N" ABBREVIATION TABLE\
\
\
\
\
\
\

ABBREVIATION DEFINITION

\
\b\
\
\
\
\
\

N.m Newton-Meter

NA Not Available

NDS Neutral Drive Switch

NGS Neutral Gear Switch

NOx Oxides of Nitrogen

NPS Neutral Pressure Switch

No. Number

Nos. Numbers

\
\
\
\
\
\
\
\f

"O" ABBREVIATION TABLE
"O" ABBREVIATION TABLE\
\
\
\
\
\
\

ABBREVIATION DEFINITION

\
\b\
\
\
\
\
\

O Oxygen

O.D. Outside Diameter

O/S Oversize

O2 Oxygen

OC Oxidation Catalyst

OCC Output Circuit Check

OD Overdrive

ODO Odometer

OHC Overhead Camshaft

ORG Orange

OSC Output State Check

Opt. Option or Optional

oz. Ounce

ozs. Ounces

\
\
\
\
\
\
\
\f

Page 98 of 1378

JEEP CHEROKEE 1988 Service Repair Manual RVB Rear Vacuum Break

RWAL Rear Wheel Anti-Lock Brake

RWD Rear Wheel Drive

RVB Rear Vacuum Break

RWAL Rear Wheel Anti-Lock Brake

RWD Rear Wheel Drive

Recirc. Recirculate or Recirculation

Reg. Regulator

Rly. Relay

\
\
\
\
\
\
\
\f

"S" ABBREVIATION TABLE
"S" ABBREVIATION TABLE\
\
\
\
\
\
\

ABBREVIATION DEFINITION

\
\b\
\
\
\
\
\

SAW Spark Angle Word

SBC Single Bed Converter

SBEC Single Board Engine Controller

SC Super Charged

SCC Spark Control Computer

SCS Air Suction Control Solenoid

SDM Supplemental Restraint System Diagnostic Module

SDU SRS Diagnostic Unit

SEN Sensor

SES Service Engine Soon

SFI Sequential (Port) Fuel Injection

SIG RTN Signal Return circuit

SIL Shift Indicator Light

SIR Supplemental Inflatable Restraint

SMEC Single Module Engine Controller

SOHC Single Overhead Cam

SOL or Sol. Solenoid

SPFI Sequential Port Fuel Injection

SPK Spark Control

SPOUT Spark Output Signal

SRS Supplemental Restraint System (Air Bag)

SS 3/4-4/3 Shift Solenoid circuit

SSI Solid State Ignition

STAR Self-Test Automatic Readout

STI Self Test Input circuit

STO Self-Test Output

SUB-O2 Sub Oxygen Sensor

Sen. or Sens. Sensor

Sol. Solenoid

Sprchg. Supercharger

Strg. Steering

Susp. Suspension

Sw. Switch

Sys. System

\
\
\
\
\
\
\
\f

"T" ABBREVIATION TABLE
"T" ABBREVIATION TABLE\
\
\
\
\
\
\

ABBREVIATION DEFINITION

\
\b\
\
\
\
\
\

T.V. Throttle Valve

TAB Thermactor Air By-Pass

TAC Thermostatic Air Cleaner

TAD Thermactor Air Diverter

TAN Tan

TBI Throttle Body Injection

Page 101 of 1378

$JEEP CHEROKEE 1988 Service Repair Manual \003 A/C C O M PR ESSO R O IL C HEC KIN G 1988 J e ep C hero ke e A/C General Servicing COMPRESSOR OIL CHECK * PLEASE READ THIS FIRST * CAUTION: When discharging ai$

\003
A/C C O M PR ESSO R O IL C HEC KIN G

1988 J e ep C hero ke e
A/C General Servicing
COMPRESSOR OIL CHECK
* PLEASE READ THIS FIRST *
CAUTION: When discharging air conditioning system, use only approved
refrigerant recovery/recycling equipment. Make every attempt
to avoid discharging refrigerant into the atmosphere.
ISOLATING COMPRESSOR - GRAND WAGONEER ONLY
1) Connect service gauge set to the compressor service valves
and open compressor valves slightly (turn clockwise). Start engine and\
operate air conditioning. Slowly turn compressor suction valve
clockwise toward closed (front-seated) position.
2) When suction pressure is reduced to zero or less, turn off
engine and compressor and quickly turn suction valve stem in to full
front-seated position. Suction pressure should be slightly above zero.
Turn discharge valve into front-seated position.
3) To check oil lever, slowly open crankcase plug to relieve
any remaining pressure. After oil level is correct, cap service gauge
parts on both valves. Back-seat suction service valve to allow
refrigerant to enter compressor. Open discharge valve halfway.
4) Loosen discharge service valve cap, allowing refrigerant
pressure to force air out of compressor. Back-seat service valve and
tighten cap. Compressor is now ready for operation.
REFRIGERANT OIL
Only new, pure, moisture-free refrigerant oil should be used
in the air conditioning system. This oil is highly refined and
dehydrated to a point where moisture content is less than 10 parts per
million. The oil container must be tightly closed at all times when
not in use, or moisture will be absorbed from the air and introduced
into the refrigeration system.
DISCHARGING SYSTEM
CAUTION: When discharging air conditioning system, use only approved
refrigerant recovery/recycling equipment. Make every attempt
to avoid discharging refrigerant into the atmosphere.
If compressor has stem-type service valves, it can be
isolated and removed without discharging entire system. Otherwise,
discharge system completely using approved refrigerant
recovery/recycling equipment before loosening any fittings.
DISCONNECTING LINES & FITTINGS
After system is discharged, carefully clean area around all
fittings to be opened. Always use 2 wrenches when tightening or
loosening fittings to avoid twisting or distorting lines. Cap or plug
all openings as soon as lines are removed. Do not remove caps until
immediately before connections are made. This will keep entry of air
and moisture to a minimum, reducing the chance of damage to
components.

Page 103 of 1378

JEEP CHEROKEE 1988 Service Repair Manual 1) Remove gauge set and place caps on service valve ports.
Back-seat the suction service valve to allow refrigerant to enter
compressor.
2) Loosen discharge port valve slightly. Loos

Page 161 of 1378

JEEP CHEROKEE 1988 Service Repair Manual Discharge air warm when low
side gauge drops into vacuum.
Normal Normal Thermostatic switch system Defective Thermo-
only-compre

Discharge air warm when low
side gauge drops into vacuum.
Normal Normal Thermostatic switch system Defective Thermo-
only-compressor cycles off static Switch
and on too rapidly.
Normal Normal Cycling clutch systems Misadjusted Thermo-
only-Compressor doesn't static Switch or
turn on soon enough. or Defective
Discharge air becomes Pressure Sensing
warm as low side pressure Switch
rises.
Low Low Bubbles in sight glass. Low R-12 Charge
Outlet air slightly cool.
Low Low Sight glass clear or oil- Excessively Low
streaked. Outlet air very R-12 Charge
warm.
Low Low Outlet air slightly cool. Expansion Valve
Sweating or frost at Stuck Closed.
at expansion valve. Screen Plugged or
Sensing Bulb
Malfunction.
Low Low Outlet air slightly Restriction on High
cool. High side line Side
cool to touch. Sweating
or frost on high side.
Low High Evaporator outlet pipe STV Stuck Open
cold. Low side goes
into vacuum when blower
is disconnected.
High Low Evaporator outlet pipe STV Stuck Open
warm. Outlet air warm.
High Low Noise from compressor. Compressor
Malfunction
High High Outlet air warm. Liquid Condenser
line very hot. Bubbles Malfunction or R-12
in sight glass. Overcharge.
High High Outlet air slightly cool. Large Amount of Air
Bubbles in sight glass. and Moisture in
System.
High High Outlet air warm. Expansion Valve
Evaporator outlet Stuck Open
sweating and frost.
(1) - If equipped with a low refrigerant charge protection system,
compressor operation may have stopped.
\
\
\
\
\
\
\

Page 164 of 1378

JEEP CHEROKEE 1988 Service Repair Manual 2) Loosen discharge port valve slightly. Loosen valve port
cap to allow refrigerant to force out air from compressor. Back-seat
the discharge valve and tighten the port cap. Compressor is rea

2) Loosen discharge port valve slightly. Loosen valve port
cap to allow refrigerant to force out air from compressor. Back-seat
the discharge valve and tighten the port cap. Compressor is ready for
service.
REFRIGERATION OIL
Only new, pure, moisture-free refrigeration oil should be
used in the air conditioning system. This oil is highly refined and
dehydrated (moisture content less than 10 parts per million).
Refrigeration oil container must be kept tightly closed at
all times when not in use, or moisture will be absorbed from the air
and introduced into the refrigeration system.
NIPPONDENSO 10-CYLINDER
SHAFT SEAL
NOTE: Check compressor refrigerant oil level when replacing seals.
See COMPRESSOR REFRIGERANT OIL CHECKING article in this
section.
Removal
1) Hold clutch hub stationary and remove center nut. Screw
remover into center of hub. Turn center bolt to remove pressure plate.
2) Remove shims from shaft. Remove snap ring from inside of
pulley. Tap pulley off of shaft with plastic mallet. Be careful not
to distort pulley while removing.
3) Disconnect clutch coil wires from compressor housing.
Remove snap ring inside coil and lift coil off compressor. Pry dust
seal out from around compressor shaft (if equipped).
4) Place shaft key remover on shaft and turn to remove key.
Remove drain plug (if equipped). Remove bolts holding service valves
to body of compressor and remove valves. Discard "O" rings. Drain oil
out of compressor.
5) Remove 6 through bolts from front head of compressor and
discard washers. Tap head loose from compressor, being careful not to
scratch sealing surfaces. Remove snap ring (if equipped) from front
housing. Press seal plate out. Remove seal from shaft. See Fig. 1.
Installation
1) Lubricate shaft seal with clean refrigerant oil. Place on
compressor shaft. Lubricate seal plate (and "O" ring, if equipped) and\
install in front housing. Install snap ring (if equipped).
2) Place front housing on compressor body. Using new
washers, install through bolts. Tighten bolts evenly and alternately
to 18 ft. lbs. (24 N.m). Install shaft key with installer and plastic
mallet. Insert dust seal into front of compressor.
3) Install drain plug using new gasket. Add correct amount
of refrigerant oil to compressor. If service valves were removed,
coat new "O" rings with refrigerant oil and install service valves.
4) Place clutch coil on compressor and install snap ring.
Install shims on shaft to adjust clearance between pressure plate and
rotor to .016-.028" (.41-.71 mm). Tighten shaft nut to 12 ft. lbs. (1\
6
N.m). See REFRIGERANT OIL & R-12 SPECIFICATIONS table for system
capacities.
SANKYO/SANDEN 5-CYLINDER COMPRESSOR SERVICING
NOTE: During the past year, Sankyo International (USA), Inc. has
changed its name to Sanden International (USA), Inc.

Load next 8 pages

Page: < prev 1-8 9-16 17-24 25-32 33-40 41-48 ... 184 next >

lumbar support overheating maintenance apple carplay oil pressure wiper size