Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA1986CELICA GT, 2D HATCHBACK, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMTCCS SYSTEM
1986 Toyota Celica GT, 2D Hatchback, Standard
TCCS System
1986 Toyota Celica GT, 2D Hatchback, StandardSECTION TCCS System
- Description
- Operation
- Diagnosis & Testing
- Diagnosis
- Recalling Trouble Codes
- System Testing
- Diagnostic Circuit Check
- Injector Circuits Check
- Trouble Code 2 Airflow Meter & Circuit
- Trouble Code 3 Ignition Circuit
- Trouble Code 4 Coolant Temp. Sensor & Circuit
- Trouble Code 5 Oxygen Sensor
- Trouble Code 6 Igniter & Circuit
- Trouble Code 7 TPS Sensor & Circuit
- Trouble Code 8 Intake Air Temp. Sensor & Circuit
- Trouble Code 9 Vehicle Speed Sensor
- Trouble Code 10 Ignition & Starter Circuit
- Trouble Code 10 Main Relay & Circuit
- Check Engine Light Off
- A/C Compressor
- Trouble Code 11 Main Relay & Circuit
- Trouble Codes 12 & 13 Rpm Signal
- Trouble Code 14 IGNITOR & Circuit
- Trouble Code 21 Oxygen Sensor
- Trouble Code 22 Coolant Temperature Sensor & Circuit
- Trouble Codes 23, 24, 31 & 32 Airflow Meter & Circuit
- Trouble Code 41 TPS Sensor & Circuit
- Trouble Code 42 VSS & Circuit
- Trouble Code 43 Ignition & Starter Circuits
- ISC & Circuit Check
- Component Testing
- TCCS Voltage & Resistance Specifications
- Adjustments
- Wiring Diagrams
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.