Specifications
| Item | Specification |
|---|---|
| Firing order | 1-4-2-5-3-6 |
| Spark plug gap | 1.3-1.45mm (0.051-0.057in) |
| Spark plug type | AWSF22FS |
| High temperature nickel anti-seize lubricant F6AZ-9L494-AA (Spark plug thread) | ESE-M12A4-A |
General Specifications
| Description | Nm |
|---|---|
| Spark plugs | 15 |
| Ignition coil-on-plug retaining bolts | 6 |
Torque Specifications
Scheme 1
| Item Number | Description |
|---|---|
| 1 | Ignition coil-on-plug |
| 2 | Ignition coil-on-plug retaining bolt |
| 3 | Spark plug |
The right-hand cylinders are numbered 5,3,1 and the left-hand cylinders are numbered 6,4,2 when viewed from the rear of the engine.
The ignition system consists of an ignition coil located on each individual cylinder and each individual spark plug. The ignition timing can now be adjusted more rapidly and independently.
The crankshaft position sensor signal is the basis for ignition timing calculations. The alternating voltage signal from the crankshaft position sensor is converted by the engine control module (ECM). This digital signal is then used to position the closing time of the primary circuit of the ignition coil. The effective range for ignition timing control is increased to the fact that there are no rotating parts.
On the basis of engine speed and load inputs, the powertrain control module determines the ignition timing. This function also takes other inputs into consideration such as engine temperature, throttle position, knock control, cam position, traction control and electronic transmission control inputs.
This ignition system enables the customer to drive the vehicle home if a coil or coil wiring failure occurs. In the event of a wiring failure between the powertrain control module and the coil, the coil will fail instead of the coil fuse blowing, which will allow the remaining coils to continue to function and the engine to limp home.
See also:
• Electronic Engine Controls