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.