Location of components
| Item name | Spare part number | Description |
| 1 | - | Ignition coil |
| 2 | - | Spark plug |
| 3 | - | Capacitor |
General provisions
The ignition system of the 4.4 liter engine uses one spark plug per cylinder. The spark plug electrode has an iridium overlay, each spark plug has its own ignition coil. Ignition coils are controlled directly by the ECM (the engine control unit).
Power is supplied to the ignition coils from the power relay through the VLZ fuse (battery circuit junction box) . To suppress radio interference, capacitors are installed in parallel with the power circuit of the ignition coils.
Each ignition coil has a transistor switch for the primary power circuit of the coil. ECM () controls the power-up by applying a signal to the base of the transistor switch. ECM () monitors the operation of the ignition coils using a feedback signal from the power circuit of each of the coils. When an ECM malfunction is detected (the engine control unit) writes the corresponding code
ECM () depending on the voltage of the battery and the speed of the crankshaft, it regulates the duration of the closed state of the primary winding in order to ensure the constancy of the energy of the discharge formed in the secondary winding. This allows for good sparking without overloading the primary circuit by current and overheating of the ignition coils.
ECM (the engine control unit) calculates the ignition timing from the following data:
- Engine crankshaft speed.
- Distributor position.
- Engine load.
- Coolant temperature.
- Tendency to detonate.
- On vehicles with automatic transmission, the position of the selector is taken into account.
- Idling requirements are taken into account.
Ignition control circuit
NOTE: A = Wired connections
| Item name | Spare part number | Description |
| 1 | - | Accumulator battery |
| 2 | - | Fusible link11E, BJB (battery circuit junction box) |
| 3 | - | ignition switch |
| 4 | - | Fuse 25P, ignition power, CJB (central junction box) |
| 5 | - | Fuse 60P, starter power, CJB (central junction box) |
| 6 | - | ECM (the engine control unit) |
| 7 | - | Ignition coil and spark plug #5 |
| 8 | - | Ignition coil and spark plug #2 |
| 9 | - | Ignition coil and spark plug #3 |
| 10 | - | Ignition Coil and No. 8 Spark Plug |
| 11 | - | Capacitor |
| 12 | - | Ignition coil and spark plug #4 |
| 13 | - | Ignition coil and spark plug No. 7 |
| 14 | - | Ignition coil and spark plug #6 |
| 15 | - | Ignition coil and spark plug #1 |
| 16 | - | Fuse 6E, BJB (battery circuit junction box) |
| 17 | - | Power relay |
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