Table of Contents
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NOTICE
This vehicle has an SRS AIRBAG (referred to as the airbag in the remainder
of this manual).
When handling airbag components (removal, installation or inspection, etc.),
always follow the directions given in the repair manuals listed above to
prevent the occurrence of accidents and airbag malfunction.
FOREWORD
This wiring diagram has been prepared to provide information
on the electrical system of the 1990 TOYOTA CELICA (FWD).
Applicable models:
For service specifications and repair procedures of the above
models other than those listed in this manual, refer to the
following manuals:
Manual Name
S 1990 Celica Repair Manual
S 1990 Celica New Car Features
All information in this manual is based on the latest product
information at the time of publication. However, specifications
and procedures are subject to change without notice.
TOYOTA MOTOR CORPORATION
AT180 Series
ST184 Series
NCF056U
Pub. No.
RM149U
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Table of Contents
Related Manuals for Toyota CELICA 1990
Summarization of Contents
HOW TO USE THIS MANUAL
System Outline
Outlines the manual's sections and purpose.
Service Hints
Provides tips and notes for specific operations.
TROUBLESHOOTING
Voltage Check
Procedure for checking voltage in circuits.
Continuity and Resistance Check
Methods for checking circuit continuity and resistance.
Finding a Short Circuit
Steps to locate short circuits using a test light.
RELAY LOCATIONS
Relay Locations - Engine Compartment
Diagrams showing relay positions in the engine compartment.
Relay Locations - Instrument Panel
Diagrams showing relay positions in the instrument panel.
ELECTRICAL WIRING ROUTING
Position of Parts in Engine Compartment
Illustrates wiring harness routing for engine compartment parts.
Position of Parts in Instrument Panel
Illustrates wiring harness routing for instrument panel parts.
Position of Parts in Body
Illustrates wiring harness routing for body parts.
STARTING AND IGNITION
Service Hints
Specific tips for starting and ignition systems.
ENGINE CONTROL (5S–FE)
System Outline
Overview of the engine control system and its functions.
Input Signals
Describes signals received by the ECU from various sensors.
Control System
Explains the EFI and ESA control systems.
ENGINE CONTROL (4A–FE)
System Outline
Overview of the 4A-FE engine control system.
Input Signals
Describes signals input to the ECU for the 4A-FE engine.
ILLUMINATION
Service Hints
Specific tips related to illumination systems.
TAILLIGHT
Service Hints
Specific tips for the taillight system.
HEADLIGHT (USA)
Service Hints
Specific tips for USA headlight system.
FOG LIGHT (USA)
Service Hints
Specific tips for USA fog light system.
STOP LIGHT
Service Hints
Specific tips for the stop light system.
TURN SIGNAL AND HAZARD WARNING LIGHT
Service Hints
Specific tips for turn signal and hazard lights.
POWER WINDOW
System Outline
Overview of the power window system operation.
Service Hints
Specific tips for power window operation.
DOOR LOCK
System Outline
Explains the operation of the door lock system.
Service Hints
Specific tips for door lock operation.
REAR WIPER AND WASHER
System Outline
Explains the operation of the rear wiper and washer.
Service Hints
Specific tips for rear wiper and washer.
FRONT WIPER AND WASHER
System Outline
Explains the operation of the front wiper and washer.
Service Hints
Specific tips for front wiper and washer.
UNLOCK AND SEAT BELT WARNING
System Outline
Explains the operation of unlock and seat belt warning systems.
Service Hints
Specific tips for unlock and seat belt warning.
REAR WINDOW DEFOGGER
Service Hints
Specific tips for the rear window defogger.
POWER SEAT
Parts Location
Lists parts for the power seat system.
REMOTE CONTROL MIRROR
Service Hints
Specific tips for remote control mirrors.
SUN ROOF
System Outline
Explains the operation of the sun roof system.
Service Hints
Specific tips for sun roof operation.
ECT (ELECTRONIC CONTROLLED TRANSMISSION)
System Outline
Overview of the ECT system and its functions.
Gear Shift Operation
Explains how the ECU controls gear shifting.
Lock–Up Operation
Describes the function of the lock–up system.
Service Hints
Specific tips for the ECT system.
OVERDRIVE
Service Hints
Specific tips for the overdrive system.
SHIFT LOCK
System Outline
Explains the operation of the shift lock system.
Shift Lock Mechanism
Describes how the shift lock mechanism functions.
CRUISE CONTROL (MOTOR TYPE)
System Outline
Overview of the motor type cruise control system.
Set Operation
How to engage the cruise control set function.
Manual Cancel Mechanism
Conditions that cancel cruise control operation.
Service Hints
Specific tips for motor type cruise control.
CRUISE CONTROL (VACUUM TYPE)
System Outline
Overview of the vacuum type cruise control system.
Cruise Control Driving
How to operate cruise control using vacuum.
Service Hints
Specific tips for vacuum type cruise control.
HORN
Service Hints
Specific tips for the horn system.
ABS (ANTI–LOCK BRAKE SYSTEM)
System Outline
Overview of the ABS system operation.
System Operation
Explains how the ABS system functions during braking.
Service Hints
Specific tips for the ABS system.
SRS AIRBAG
Notice
Important instructions for SRS airbag inspection and repair.
Work Precautions
Safety procedures before starting work on the airbag system.
Connector Functions
Describes the functions of airbag system connectors.
AUTO ANTENNA
Service Hints
Specific tips for the auto antenna system.
RADIO AND PLAYER (w/ CD PLAYER)
Service Hints
Specific tips for radio and player (with CD).
RADIATOR FAN AND AIR CONDITIONER (AUTOMATIC AIR CONDITIONER, FOR PUSH TYPE OF BLOWER CONTROL SW)
System Outline
Overview of the automatic AC system for push-type blower control.
Cooling Fan Operation
Explains how the cooling fans operate under different conditions.
Heater Blower Motor Operation (Push Type Blower Control SW (W/ AUTO A/C))
Describes heater blower operation for push-type auto AC.
RADIATOR FAN AND AIR CONDITIONER (MANUAL AIR CONDITIONER, FOR DIAL TYPE OF BLOWER CONTROL SW)
Parts Location
Lists parts for the manual AC system (dial type).
RADIATOR FAN AND AIR CONDITIONER (MANUAL FAN AND AIR CONDITIONER, FOR PUSH TYPE OF BLOWER CONTROL SW)
System Outline
Explains the operation of the manual fan/AC system (push type).
Cooling Fan Operation
Describes cooling fan operation for manual AC (push type).
Heater Blower Motor Operation (Push Type Blower Control SW (W/O AUTO A/C))
Heater blower operation for push-type, without auto AC.
RADIATOR FAN AND AIR CONDITIONER (MANUAL FAN AND AIR CONDITIONER, FOR DIAL TYPE OF BLOWER CONTROL SW)
Parts Location
Lists parts for the manual AC system (dial type).
Junction Block and Wire Harness Connector
Details on junction blocks for manual AC.
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