General information
The ignition system includes the ignition switch, battery, crankshaft position/speed sensor, ignition coil, primary (low voltage) and secondary (high voltage) ignition circuits, and spark plugs. On models with automatic transmission, the ignition unit is a separate unit. On models with manual transmission, its functions are performed by the engine management system ECU. The ignition system is controlled by the engine management system ECU. By receiving signals from sensors that monitor various engine functions (such as idle speed and piston position, air mass and air temperature, coolant temperature, etc.), the ECU ensures that the spark is delivered at the optimum moment in all engine operating modes (see Chapter 4A).
Note: All functions of the ignition system are controlled by the ECU and therefore the ignition system cannot be adjusted (see paragraph 6).
Precautionary measures
When servicing the ignition system, observe the following precautions:
- a) If the engine does not start, turn off the ignition no later than 10 seconds after turning it on.
- b) If a separate tachometer is required for servicing, consult with dealers before purchasing one, as some types of tachometers are not compatible with the ignition system. Always connect the tachometer in accordance with the manufacturer's instructions.
- c) Never connect the ignition coil terminals to ground. This may damage the coil and/or the ECU or ignition module (if it is a separate unit).
- d) Do not disconnect the battery while the engine is running.
- d) Make sure the ignition module is properly grounded (if equipped).
- e) Read the warnings at the beginning of the next paragraph regarding the dangers of high voltage.
[The original can be found on the specified resource: FORDBOOK.RU]