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.
Engine Start Signal
This signal is sent from starter circuit to ECM terminal B11 (terminal C1 on Swift DOHC or A1 on Swift SOHC). On Samurai and Sidekick, ECM uses signal to determine whether engine is cranking, to control fuel injection timing, injection time, Idle Speed Control (ISC) solenoid operation, throttle opener vacuum switching valve operation, and mixture heater operation (Sidekick A/T). On Swift DOHC, ECM uses this signal to determine whether engine is cranking and to control ignition timing. On Swift SOHC, ECM uses this signal to determine whether engine is cranking and to control fuel injector and fuel pump relay.
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.
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