268 ENGINE 273 MPFI IGNITION COIL Installation Method The coil is mounted at the engine on top of the cylinder head cover. The connection between high voltage terminal is made by suitable ignition cables.Adefective cable could cause damage to the coil. Storage and Operating Condition The following temperatures must not be exceeded. Ambient temp. range: - 40°C to 110°C Storage temp.: - 40°C to 130°C During storage the coil must not be exposed to a wet and dusty environment. Max life Time: 10 Years. Stand alone diagnosis Winding Resistance (At room Temperature) Primary Winding Resistance: 370-430 ohm Measure between pin 1&2 (Primary) Secondary Winding Resistance: 5200-6200 ohm Measure between high voltage terminals (Secondary). Pin Details Signal Connector ECU Pin No. Pin No. UBKL.15 1 - Ignition Coil (ECU Control Signal) 2 55 Pin Configuration Type ZS-K1X2 Location The ignition coil assembly is mounted on engine at the top of cylinder head cover . Working Principle The ignition coil operates according to the laws of induction. The unit consist of twomagnetically coupled copper coils (primary and secondary windings). Energy is stored in the primary winding’s magnetic field by allowing a current to flow through the primary circuit switched by the power stage. At the firing point current flow is interrupted which induces secondary voltage in the coil’s secondary winding. The ignition coil has two high voltage terminal one for waste spark and the other for the ignition spark.
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