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.
Automatic Choke System: Description
On 2T-C and 4M engines, an electric assist choke is used. This system consists of a choke breaker diaphragm, an electrically heated bimetallic choke cap, and a choke control relay. On 20R engine, a coolant heated choke is used. This system consists of a choke breaker diaphragm and a coolant heated bimetallic choke cap. Engine coolant flows through choke cap to assist heating choke.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.