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.
1985 Toyota 4Runner Base, AutomaticFACTORY OEM SERVICE PROCEDURE
TCCS System
- Description
- Operation
- Testing
- Diagnosis
- Recalling Trouble Codes
- Entering Diagnostic Mode
- Diagnostic Code Output
- Clearing Trouble Codes
- Exiting Diagnostic Mode
- System Testing
- Diagnostic Circuit Check
- Injector Circuits Check
- Trouble Code 2 Blinks - Airflow Meter & Circuit
- Trouble Code 3 Blinks - IGNITOR & Circuit
- Trouble Code 4 Blinks - Coolant Temperature Sensor & Circuit
- Trouble Code 5 Blinks - Oxygen Sensor
- Trouble Code 6 Blinks - Rpm Signal
- Trouble Code 7 Blinks - TPS Sensor & Circuit
- Trouble Code 8 Blinks - Intake Air Temp. Sensor & Circuit
- Trouble Code 10 Blinks - Ignition & Starter Circuit
- Trouble Code 10 Blinks - Main Relay & Circuit
- Trouble Code 11 Blinks - A/C Switch Or TPS Circuit
- "Check Engine" Light Off
- Stop Light Switch On
- Component Testing
- Adjustments
- Wiring Diagrams
Factory Service Tools
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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.
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