Revotron 1.2T 158 Connector View : Component Specification : The ignition coil is mounted on thermostat housing, 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 4 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. The wire that goes from the ignition coil to the distributor and the high voltage wires that go from the distributor to each of the spark plugs are called spark plug wires or high tension leads. Sensor Stand alone Diagnosis : Connector details 1. ECU pin M1G3 : (cylinder 1 and 4) 2. ECU pin M1H3 : (cylinder 2 and 3) 3. Supply voltage (12V) 4. Ground (through solenoid) Use multimeter to check primary coil resistance between pin 4 and pin 2 (cylinder 3 and 2), or pin 4 and pin 1 (cylinder 1 and 4), which should be 0.6ohms. ii. WG PWM actuator : Component Details : Turbocharger bypass valve is a solenoid valve, whose magnetic coil is energized to open the valve. Valve can be opened in any position between its 0% opening to 100% opening by controlling the magnetic coil energization. Component Location : Preliminary Checks : 1. Loose/ Damaged Connections between bypass valve and EMS ECU. 2. Check for back out of pins at both bypass valve connector and ECU connector. 3. Check for damage of pins at both bypass valve connector and ECU connector. 4. Check the continuity bypass valve connector pins to the ECU pins. 5. Check whether the bypass valve is getting main relay power supply.
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