| Pos. | Spare part number | Name |
| 1 | - | Ignition coil |
| 2 | - | Spark plug |
| 3 | - | Engine Control Module (ECM) |
The 3.2L Si6 engine's ignition system features one iridium-tipped spark plug per cylinder, with each spark plug receiving power from an associated ignition coil. The ignition coils are controlled directly by the ECM.
Power to the ignition coils comes from the power relay through a fuse in the BJB. To suppress radio interference, a capacitor is installed in parallel with the power supply circuit of the ignition coils.
Each ignition coil has a booster stage to switch the power supply to the coil's primary winding. The ECM controls the switching using a signal sent to the stage. The ECM monitors the operation of the ignition coils using a feedback signal from each booster stage. If a malfunction is detected, the ECM stores a corresponding fault code in its memory.
Depending on the battery voltage and the engine speed, the ECM regulates the duration of the closed state of the primary winding to ensure that the discharge energy formed in the secondary winding is constant with each switching of the amplifier stage. This ensures good spark formation without overloading the primary winding circuit by current and overheating the ignition coils.
The ECM calculates the ignition timing for the cylinders based on the following data:
- Engine speed
- Camshaft position
- Engine load
- Coolant temperature
- Knock control function
- In models with automatic transmission - shift control function
- Idle mode requirements are taken into account
(The original article is located on: www.lrman.ru)
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