1988 JEEP CHEROKEE sensor

key brake diagram inflation pressure fuel filter location spare tire location

Page 84 of 1378

JEEP CHEROKEE 1988 Service Repair Manual ELECTRONIC CONTROL UNIT (ECU)
Removal & Installation
Information not available from manufacturer.
COOLANT TEMPERATURE SENSOR (CTS)
Removal & Installatio

ELECTRONIC CONTROL UNIT (ECU)
Removal & Installation
Information not available from manufacturer.
COOLANT TEMPERATURE SENSOR (CTS)
Removal & Installation
Drain cooling system. Remove air cleaner assembly. Disconnect
electrical connector and remove sensor from block. To install, reverse
removal procedure. Refill cooling system.
OXYGEN (O2) SENSOR
Removal & Installation
Raise and support vehicle. Disconnect electrical connector
from sensor. Remove sensor from exhaust manifold. Install and tighten
sensor to 35 ft. lbs. (47 N.m). Reconnect electrical connector. Lower
vehicle.
THROTTLE POSITION SENSOR (TPS)
Removal
Disconnect electrical connector from TPS. Bend lock tabs away
from retaining screws and remove screws. Remove TPS.
Installation
With throttle valve in normal closed position, install TPS.
Install TPS retaining screws. Perform OUTPUT CHECK.
NOTE: Throttle position sensor is nonadjustable. Only output
voltage can be monitored.
Output Check (Manual Transmission Only)
1) Connect negative lead of digital voltmeter to terminal "B"
and positive lead to terminal "A" of TPS connector. Do not disconnect
electrical connector. Insert leads through back of connector. It may
be necessary to remove throttle body from vehicle to gain access to
connector.
2) Turn ignition on, engine off. With throttle closed and
resting against idle stop, input voltage should be about 5 volts. Move
positive lead from terminal "B" to terminal "C" and read voltage
output. Output voltage should be about 0.8 volt with throttle closed
and resting against idle stop.
3) If voltage is not as specified, loosen lower retaining
screw and pivot sensor for large adjustments. Loosen upper retaining
screw and pivot sensor for small adjustments. Adjust sensor so output
voltage reading equals 16 percent of input voltage. If voltage
specifications cannot be obtained, replace sensor. Remove voltmeter.
Tighten screws and bend retaining tabs into position.
ALL OTHER SENSORS, SOLENOIDS & SWITCHES
Removal & Installation
Removal of sensors, switches, and solenoids is accomplished
by disconnecting the electrical and/or vacuum connectors and removing
or detaching the component. To install, reverse removal procedure.
TESTING
NOTE: Refer to Figs. 8-10 for Testing information.

Page 85 of 1378

JEEP CHEROKEE 1988 Service Repair Manual Fig. 8: Throttle Position Sensor Diagnostics

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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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 92 of 1378

JEEP CHEROKEE 1988 Service Repair Manual CO Carbon Monoxide

CO2 Carbon Dioxide

CONV Convertible

CO Carbon Monoxide

CO2 Carbon Dioxide

CONV Convertible

CP Canister Purge

CPA Connector Position Assurance

CPS Crank Position Sensor

CTS Coolant Temperature Sensor

CV Check Valve or Constant Velocity

CVC Constant Vacuum Control

CW Clockwise

CYL or Cyl. Cylinder

Calif. California

Carb. Carburetor

Chrg. Charging

Circ. Circuit

Cntrl. Control

Comp. Compressor or Compartment

Conn. Connector

Cont. Continued

Conv. Convertible or Converter

Cu. In. Cubic Inch

Cyl. Cylinder

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"D" ABBREVIATION TABLE
"D" ABBREVIATION TABLE\
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"D" Drive

DBC Dual Bed Catalyst

DC Direct Current or Discharge

DDD Dual Diaphragm Distributor

DERM Diagnostic Energy Reserve Module

DFI Digital Fuel Injection

DIC Driver Information Center

DIS Direct Ignition System

DIS Distributorless Ignition System

DIST Distribution

DISTR Distributor

DK BLU Dark Blue

DK GRN Dark Green

DME Digital Motor Electronics (Motronic System)

DOHC Double Overhead Cam

DOT Department of Transportation

DP Dashpot

DRB-II Diagnostic Readout Box

DVOM Digital Volt/Ohm Meter (see VOM)

Def. Defogger or Defroster

Def. Defrost

Defog. Defogger

Diag. Diagnostic

Dist. Distributor or Distribution

Dr. Door

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"E" ABBREVIATION TABLE
"E" ABBREVIATION TABLE\
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ABBREVIATION DEFINITION

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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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 94 of 1378

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

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g grams

GND or GRND Ground

GRN Green

GRY Gray

Ga. Gauge

Gals. gallons

Gov. Governor

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

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"I" ABBREVIATION TABLE
"I" ABBREVIATION TABLE\
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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

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"J" ABBREVIATION TABLE
"J" ABBREVIATION TABLE\
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J/B Junction Block

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"K" ABBREVIATION TABLE
"K" ABBREVIATION TABLE\
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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

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"L" ABBREVIATION TABLE
"L" ABBREVIATION TABLE\
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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

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

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mA Milliamps

mV Millivolts

mfd. Microfarads

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