1988 JEEP CHEROKEE brake sensor

bluetooth battery capacity gas type audio hood release alternator

Page 90 of 1378

$JEEP CHEROKEE 1988 Service Repair Manual AB BREVIA TIO NS 1988 J e ep C hero ke e GENERAL INFORMATION COMMONLY USED ABBREVIATION "A" ABBREVIATION TABLE "A" ABBREVIATION TABLE�\$

AB BREVIA TIO NS

1988 J e ep C hero ke e
GENERAL INFORMATION
COMMONLY USED ABBREVIATION
"A" ABBREVIATION TABLE
"A" ABBREVIATION TABLE\
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ABBREVIATION DEFINITION

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A Amperes

A/C Air Conditioning

A/T Automatic Transmission/Transaxle

AAP Auxiliary Accelerator Pump

AB Air Bleed

ABCV Air Bleed Control Valve

ABDC After Bottom Dead Center

ABRS Air Bag Restraint System

ABS Anti-Lock Brake System

AC Alternating Current

ACC A/C Clutch Compressor

ACCS A/C Cycling Switch

ACCUM Accumulator

ACCY Accessory

ACT Air Charge Temperature Sensor

ACV Thermactor Air Control Valve

ADJ Adjust or Adjustable

ADV Advance

AFS Airflow Sensor

AI Air Injection

AIR or A.I.R. Air Injection Reactor

AIS Air Injection System

ALCL Assembly Line Communications Link

ALDL Assembly Line Diagnostic Link

ARC Automatic Ride Control

ASCD Automatic Speed Control Device

ASCS Air Suction Control Solenoid

ASD Auto Shutdown

ASDM Air Bag System Diagnostic Module

ASV Air Suction Valve

ATC Automatic Temperature Control

ATDC After Top Dead Center

ATF Automatic Transmission Fluid

ATS Air Temperature Sensor

AXOD Automatic Transaxle Overdrive

Abs. Absolute

Accy. Accessory

Alt. Alternator or Altitude

Amp. Ampere

Assy. Assembly

Auto. Automatic

Aux. Auxiliary

Avg. Average

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"B" ABBREVIATION TABLE
"B" ABBREVIATION TABLE

Page 91 of 1378

$JEEP CHEROKEE 1988 Service Repair Manual �\ \ \ \ \ \ \ ABBREVIATION DEFINITION$

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ABBREVIATION DEFINITION

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B/P Backpressure

BAC By-Pass Air Control

BAP Barometric Absolute Pressure Sensor

BARO Barometric

BBDC Before Bottom Dead Center

BCM Body Control Module

BDC Bottom Dead Center

BHP Brake Horsepower

BLK Black

BLU Blue

BMAP Barometric & Manifold Absolute Pressure Sensor

BOO Brake On-Off Switch

BP Barometric Pressure sensor

BPS Barometric Pressure Sensor

BPT Backpressure Transducer

BRN Brown

BTDC Before Top Dead Center

BTU British Thermal Unit

BVSV Bimetallic Vacuum Switching Valve

Baro. Barometric

Batt. Battery

Bbl. Barrel (Example: 4-Bbl.)

Blst. Ballast

Blwr. Blower

Brkr. Breaker

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"C" ABBREVIATION TABLE
"C" ABBREVIATION TABLE\
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ABBREVIATION DEFINITION

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C Celsius (Degrees)

C(3) I Computer Controlled Coil Ignition

C(4) Computer Controlled Catalytic Converter

CANP Canister Purge solenoid

CARB California Air Resources Board

CAT Catalytic Converter

CB Circuit Breaker

CBD Closed Bowl Distributor

CBVV Carburetor Bowl Vent Valve

cc Cubic Centimeter

CCC Computer Command Control

CCD Computer Controlled Dwell

CCM Central Control Module

CCO Converter Clutch Override

CCOT Cycling Clutch Orifice Tube

CCW Counterclockwise

CDI Capacitor Discharge Ignition

CEC Computerized Engine Control

CFI Central Fuel Injection

CID Cubic Inch Displacement

CID Cylinder Identification sensor

CIS Continuous Injection System

CIS-E Continuous Injection System-Electronic

CKT Circuit

CLR Clear

CNG Compressed Natural Gas

Page 93 of 1378

$JEEP CHEROKEE 1988 Service Repair Manual \ \b\ \ \ \ \ \ EAC Electric Assist Choke$

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EAC Electric Assist Choke

EACV Electric Air Control Valve

EBCM Electronic Brake Control Module

ECA Electronic Control Assembly

ECAT Electronically Controlled Automatic Transaxle

ECM Electronic Control Module

ECT Engine Coolant Temperature Sensor

ECU Electronic Control Unit or Engine Control Unit

EDF Electric Drive Fan relay assembly

EDIS Electronic Distributorless Ignition System

EEC Electronic Engine Control

EECS Evaporative Emission Control System

EEPROM Electronically Erasable PROM

EFE Early Fuel Evaporation

EFI Electronic Fuel Injection

EGO Exhaust Gas Oxygen sensor (see HEGO)

EGR Exhaust Gas Recirculation system

EGRC EGR Control solenoid or system

EGRV EGR Vent solenoid or system

EMR Emission Maintenance Reminder Module

ESA Electronic Spark Advance

ESC Electronic Spark Control

EST Electronic Spark Timing

ETR Emergency Tensioning Retractor

EVAP Fuel Evaporative System

EVIC Electronic Vehicle Information Center

EVO Electronic Variable Orifice

EVP EGR Valve Position Sensor

EVR EGR Valve Regulator

EVRV Electronic Vacuum Regulator Valve

Elect. Electronic

Eng. Engine

Evap. Evaporative

Exc. Except

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"F" ABBREVIATION TABLE
"F" ABBREVIATION TABLE\
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ABBREVIATION DEFINITION

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F Fahrenheit (Degrees)

F/B Fuse Block

FBC Feedback Carburetor

FI Fuel Injector or Fuel Injection

FICD Fast Idle Control Device

FIPL Fuel Injector Pump Lever

FP Fuel Pump

FPM Fuel Pump Monitor

FPR-VSV Fuel Pressure Regulator Vacuum Switching Valve

FWD Front Wheel Drive

Fed. Federal

Ft. Lbs. Foot Pounds

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"G" ABBREVIATION TABLE
"G" ABBREVIATION TABLE\
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ABBREVIATION DEFINITION

Page 97 of 1378

$JEEP CHEROKEE 1988 Service Repair Manual "P" ABBREVIATION TABLE "P" ABBREVIATION TABLE�\ \ \ \ \ \ \$

"P" ABBREVIATION TABLE
"P" ABBREVIATION TABLE\
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ABBREVIATION DEFINITION

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"P" Park

P/C Printed Circuit

P/N Park/Neutral

P/S Power Steering

PAV Pulse Air Valve

PC-SOL Purge Control Solenoid

PCM Powertrain Control Module

PCS Purge Control Solenoid

PCSDM Passenger Compartment Sensor/Diagnostic Module

PCV Positive Crankcase Ventilation

PFE Pressure Feedback EGR sensor or circuit

PFI Port Fuel Injection (see MA SEFI)

PGM-CARB Programmed Carburetor

PGM-FI Programmed Fuel Injection

PIP Profile Ignition Pickup

PNK Pink

PPL Purple

PRNDL Park Reverse Neutral Drive Low

PROM Programmable Read-Only Memory

psi Pounds Per Square Inch

PSPS Power Steering Pressure Switch

PTC Positive Temperature Coefficient

PTO Power Take-Off

PWR GND Power Ground circuit

Pkg. Package

Press. Pressure

Prog. Programmed or Programmable

Pts. Pints

Pwr. Power

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"Q" ABBREVIATION TABLE
"Q" ABBREVIATION TABLE\
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ABBREVIATION DEFINITION

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Qts. Quarts

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"R" ABBREVIATION TABLE
"R" ABBREVIATION TABLE\
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ABBREVIATION DEFINITION

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RABS Rear Anti-Lock Brake System

RAC Remote Accessory Control

RAM Random Access Memory

RAP Retained Accessory Power

RECIRC Recirculation

RED Red

RH Right Hand

ROM Read Only Memory

RPM Revolutions Per Minute

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

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

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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

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

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T.V. Throttle Valve

TAB Thermactor Air By-Pass

TAC Thermostatic Air Cleaner

TAD Thermactor Air Diverter

TAN Tan

TBI Throttle Body Injection

Page 118 of 1378

JEEP CHEROKEE 1988 Service Repair Manual HEATER HOSES
HIGH PRESSURE RELIEF VALVES (HPRV)
IDLERS
IN-LINE FILTERS
METAL FITTINGS
METAL LINES
MIX AND AIR CONTROL DOORS (BLEND

HEATER HOSES
HIGH PRESSURE RELIEF VALVES (HPRV)
IDLERS
IN-LINE FILTERS
METAL FITTINGS
METAL LINES
MIX AND AIR CONTROL DOORS (BLEND DOORS)
O-RINGS
ORIFICE TUBES
PILOT-OPERATED ABSOLUTES (POAS)
PLENUMS
PRESSURE CONTROL VALVES
PRESSURE SENSORS
PULLEYS
RADIATORS
RECEIVER-DRIERS
REFRIGERANT
REFRIGERANT OIL
RELAYS
SEALS
SERVICE PORTS
SPRING LOCK COUPLINGS
SUCTION THROTTLING VALVES (STVS)
SWITCHES (ELECTRICAL)
TENSIONERS
THERMISTORS AND PRESSURE SENSORS
THERMOSTATS AND HOUSINGS
VACUUM HOSES AND TUBES
VACUUM RESERVOIRS
VACUUM TUBES
VALVES IN RECEIVER (VIRS)
WATER PUMPS (ELECTRIC AUXILIARY)
WIRING HARNESSES AND CONNECTORS
MOTORIST ASSURANCE PROGRAM (MAP)
OVERVIEW
The Motorist Assurance Program is the consumer outreach
effort of the Automotive Maintenance and Repair Association, Inc.
(AMRA). Participation in the Motorist Assurance Program is drawn from
retailers, suppliers, independent repair facilities, vehicle
manufacturers and industry associations.
Our organization's mission is to strengthen the relationship
between the consumer and the auto repair industry. We produce
materials that give motorists the information and encouragement to
take greater responsibility for their vehicles-through proper,
manufacturer-recommended, maintenance. We encourage participating
service and repair shops (including franchisees and dealers) to adopt
(1) a Pledge of Assurance to their Customers and (2) the Motorist
Assurance Program Standards of Service. All participating service
providers have agreed to subscribe to this Pledge and to adhere to the
promulgated Standards of Service demonstrating to their customers that
they are serious about customer satisfaction.
These Standards of Service require that an inspection of the
vehicle's (problem) system be made and the results communicated to the\
customer according to industry standards. Given that the industry did
not have such standards, the Motorist Assurance Program successfully
promulgated industry inspection communication standards in 1994-95 for
the following systems: Exhaust, Brakes, ABS, Steering and Suspension,
Engine Maintenance and Performance, HVAC, and Electrical Systems.
Further, revisions to all of these inspection communication standards

Page 192 of 1378

$JEEP CHEROKEE 1988 Service Repair Manual \003 AN TI- L O CK B RAK E S A FE TY P R EC AU TIO NS 1988 J e ep C hero ke e GENERAL INFORMATION Anti-Lock Brake Safety Precautions * PLEASE READ THIS FIRST *$

\003
AN TI- L O CK B RAK E S A FE TY P R EC AU TIO NS

1988 J e ep C hero ke e
GENERAL INFORMATION
Anti-Lock Brake Safety Precautions
* PLEASE READ THIS FIRST *
This article is intended for general information purposes
only. This information may not apply to all makes and models. If
vehicle is equipped with Anti-Lock Brake System (ABS), refer to
appropriate ANTI-LOCK BRAKE SYSTEM article in the BRAKES section for
description, operation, depressurizing, testing, system bleeding,
trouble shooting and servicing of specific system.
WARNING: Failure to depressurize ABS could lead to physical injury.
ANTI-LOCK BRAKE SAFETY PRECAUTIONS
WARNING: Failure to depressurize ABS could lead to physical injury.
* NEVER open a bleeder valve or loosen a hydraulic line
while ABS is pressurized.
* NEVER disconnect or reconnect any electrical connectors
while ignition is on. Damage to ABS control unit may result.
* DO NOT attempt to bleed hyudarulic system without first
referring to the appropriate ANTI-LOCK BRAKE SYSTEM article
in the BRAKES section.
* Only use specially designed brake hoses/lines on ABS equipped
vehicles.
* DO NOT tap on speed sensor components (sensor, sensor rings).
Sensor rings must be pressed into hubs, NOT hammered into
hubs. Striking these components can cause demagnetization or
a loss of polarization, affecting the accuracy of the speed
signal returning to the ABS control unit.
* DO NOT mix tire sizes. Increasing the width, as long as tires
remain close to the original diameter, is acceptable. Rolling
diameter must be identical for all 4 tires. Some
manufacturers recommend tires of the same brand, style and
type. Failure to follow this precaution may cause inaccurate
wheel speed readings.
* DO NOT contaminate speed sensor components with grease. Only
use recommended coating, when system calls for an
anti-corrosion coating.
* When speed sensor components have been removed, ALWAYS check
sensor-to-ring air gaps when applicable. These specifications
can be found in each appropriate article.
* ONLY use rocommended brake fluids. DO NOT use silicone brake
fluids in an ABS equipped vehicle.
* When instlling transmittion devices (CB's, telephones, etc.)
on ABS equipped vehicles, DO NOT locate the antenna near the
ABS control unit (or any control unit).
* Disconnect all on-board computers, when using electric
welding equipment.
* DO NOT expose the ABS control unit to prolonged periods of
high heat (185
F/85C for 2 hours is generally considered a
maximum limit).

Page 193 of 1378

$JEEP CHEROKEE 1988 Service Repair Manual \003 AU TO T R AN S D IA G NO SIS - A W 4 1988 J e ep C hero ke e AUTOMATIC TRANSMISSIONS Aisin Warner 4 Electronic Diagnosis APPLICATION NOTE: Transmission may a$

\003
AU TO T R AN S D IA G NO SIS - A W 4

1988 J e ep C hero ke e
AUTOMATIC TRANSMISSIONS
Aisin Warner 4 Electronic Diagnosis
APPLICATION
NOTE: Transmission may also be referred to as AW-4.
TRANSMISSION APPLICATION
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Vehicle Application Transmission Model
Jeep
1987-96 Cherokee ................................... AW4
1987-92 Comanche ................................... AW4
1987 Grand Wagoneer ................................ AW4
1987-90 Wagoneer ................................... AW4
1992 Wrangler ...................................... AW4
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NOTE: Vehicle body code may be required when diagnosing or
repairing transmission, as body code may be used instead of
vehicle model name. See BODY CODE DESIGNATION table.
BODY CODE DESIGNATION
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Vehicle Model Body Code
Cherokee .............................................. XJ
Comanche .............................................. MJ
Grand Wagoneer ........................................ SJ
Wagoneer .............................................. XJ
Wrangler .............................................. YJ
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DESCRIPTION
The electronic control system for the AW-4 transmission
controls transmission shift points and torque converter lock-up.
Electronic control system consists of Transmission Control Module
(TCM), valve body solenoids, throttle position sensor, speed sensor,
neutral safety switch and brake switch.
NOTE: Transmission Control Module (TCM) may be referred to as
Transmission Control Unit (TCU). Neutral safety switch may
be referred to as park/neutral safety switch or gear select
switch.
OPERATION
TRANSMISSION CONTROL MODULE (TCM)
The TCM determines shift points and torque converter lock-up
based on input signals received from throttle position sensor, neutral
safety switch, speed sensor and brake switch. The TCM controls
transmission shift points and torque converter lock-up by operating
electric solenoids mounted on the valve body.
The TCM contains a self-diagnostic system used for
determining an electronic component failure. The TCM self-diagnostic

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