Toyota COMPUTER-CONTROLLED SYSTEM

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TOYOT

A

11

QUALITY SERVIC

E

OVERSEAS SERVICE DIVISION

TOYOTA MOTOR CORPORATION

PRINTED IN

JAPAN [c

]

9109-N2-9710

NAME

Table of Contents

Table of Contents4
Abbreviations and Ecu Terminal Symbols7
- Abbreviations7
- Ecu Terminal Symbols8
Outline of Tcc S11
- What Is Tccs11
- History of Tccs Engine Control System12
- System Description13
Electronic Control Syste M19
- General19
- Power Circuitry21
  - Engine Without Stepper Motor Typ E21
    - ISC Valve22
  - Engine with Stepper Motor Type22
- VC Circuitry22
- Ground Circuitry22
- Manifold Pressure Sensor23
  - (Vacuum Sensor)23
- Air Flow Meter24
  - Vane Type24
    - Optical Karman Vortex Type27
    - Hot-Wire Type28
- Throttle Position Sensor30
  - On-Off Type30
  - Linear Type31
- G and Ne Signal Generators32
- Water Temperature Sensor39
- Intake Air Temperature39
- Sensor39
- Oxygen Sensor (02 Sensor)40
- Zirconia Element Type40
- Titania Element Type42
- Lean Mixture Sensor43
Vehicle Speed Sensor44
- Reed Switch Type44
- Photocoupler Type44
- Electromagnetic Pickup Type45
- MRE Type47
Sta Signal48
Nsw Signal48
Electrical Load Signal49
Fuel Control Switch or50
- Connector50
Egr Gas Temperature Sensor50
Variable Resistor51
Kick-Down Switch52
Water Temperature Switch52
Clutch Switch52
Knock Sensor53
Hac Sensor54
Vapor Pressure Sensor54
Turbocharging Pressure Sensor54
Stop Lamp Switch55
Oil Pressure Switch55
Communications Signals55
- Throttle Opening Angle Signals55
- Throttle Opening Angle Signals Fo R55
  - TRC System56
- Cruise Control System56
  - Communications Signal56
  - TRC System Communications Signal56
- Intercooler System Warning Signal56
  - Signal56
- Engine Speed Signal57
- Engine Immobiliser Syste M57
Diagnostic Terminal(S)58
General59
Efi (Electronic Fuel Injection )59
Types of Efi62
D-Type EFI62
- Appendix150
- Diagnostic Codes150
- Fail-Safe Function153
- Back-Up Function155
- Troubleshootin Ggeneral157
- How to Carry Ou Ttroubleshooting158
- Pre-Diagnostic Questioning159
- Symptom Chart162
- Check Engine" Lamp Check167
- Checking and Clearing Diagnostic167
- Output of Diagnostic Code S167
- Normal Mode169
- Test Mode169
- Clearing Diagnostic Code170
- Is Symptom Simulation173
- Basic Inspection174
- Inspection and Adjustmen Tgeneral178
- Idle Speed and Idle Mixture179
- (Vacuum Sensor)181
- Manifold Pressure Senso R181
- Body183
- Throttle Position Sensor (Linear Type) and Throttle183
- Distributor (G and Ne Signals)186
- Intake Air Temperature Sensor187
- Feedback Correction188
- Models with Oxygen Senso R188
Models with Lean Mixture Sensor189
Variable Resistor190
- Isc Valv E (Duty-Control Acv Type)192

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