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.
Electronic Ignition Timing Control (1.3L)
Ignition timing is calculated by PCM, based on current engine status. PCM receives signals indicating vehicle speed, manifold vacuum, throttle position and engine coolant temperature. PCM uses reference pulses from crankshaft position sensor to determine engine speed. PCM cannot operate ignition system without engine speed signal from crankshaft position sensor. PCM controls ignition timing by controlling ignition coils.
Ignition timing is controlled by PCM and is not adjustable. See IGNITION TIMING in appropriate ON-VEHICLE ADJUSTMENTS article. DTC P1530 can set in PCM memory during idle speed adjustment. For test procedure with DTC set, see appropriate SELF-DIAGNOSTICS article.
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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