1.2L REVOTRON ENGINE 129 I. IGNITION COIL COMPONENT DETAILS An ignition coil (also called a spark coil) is an induction coil in an automobile's ignition system which transforms the battery's low voltage to the thousands of volts needed to create an electric spark in the spark plugs to ignite the fuel. . Ignition coil is mounted on cylinder head cover and directly connected on spark plug. Component Location Preliminary Checks 1. Loose/ Damaged Connections between Ignition coil A and EMS ECU. 2. Check for back out of pins at both Ignition Coil connector and ECU connector. 3. Check for damage of pins at both Ignition Coil connector and ECU connector. CONNECTOR DETAIL PINOUT DETAILS PIN DESCRIPTION 1 ECU 2 +B COMPONENT SPECIFICATION Ignition coil is mounted on cylinder head cover and directly connected to spark plug to have the shortest length of high tension cable connected to spark plugs so as to reduce the level of electromagnetic radiation from HT cables and possible interference to ECU. The ignition coil assembly - a duel spark coil with built-in power switch with a 3 pin connector operates on conventional principle of secondary voltage generation due to induction. The primary switching (ON/OFF) is triggered by ECU which maintain constant dwell time, i.e. time required to energize primary coil, throughout the operating condition. An ignition coil (also called a spark coil) is an induction coil in an automobile's ignition system which transforms the battery's low voltage to the thousands of volts needed to create an electric spark in the spark plugs to ignite the fuel. SENSOR STAND ALONE DIAGNOSIS Use multimeter to check primary coil resistance between pin 3 and pin 1 which should be 0.6ohms.
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