Ignition booster (Peugeot Eurovans 806)

Ignition booster (see illustration 11.15) includes a circuit to connect the negative terminal of the ignition coil to create a spark discharge. Depending on the model, either one or two separate amplifiers are used in the ignition system. Electronic control unit (ECM) calculates the ignition timing and injection timing based on the data received from the sensors.



Regarding the static ignition system (DIS), the two signals are sent in the required sequence to the amplifier, which then sends voltage to the corresponding negative terminal of the DIS ignition coil.

For direct ignition (DI) The ECM sends four signals, two signals to each amplifier, to apply voltage to the negative terminal of the ignition coil for the corresponding cylinder. Each booster turns on twice during an engine cycle, and each booster turns on two ignition coils. Booster A turns on ignition coils #2 and #4, and then booster B turns on ignition coils #1 and #3.

DIS Amplifier Voltage Values

Terminal numbers

Note, nbv is the nominal battery voltage (see illustration 11.10)

Amplifier DI Voltage Values (Amplifiers A and B)

Terminal numbers

See illustration 11.11

Influence of external factors

• Ignition system malfunction
• Faulty ignition switch
• Generator
• Voltage regulator or ignition distributor