Ignition system amplifier (Discovery 1)

Note: The ignition system amplifier is located on the high voltage distributor.

Checking the supply voltage - Figure 17

Technical conditions

Contacts	Position	Voltage
3 and mass	Ignition ON	battery

Make sure the ignition is off.

Disconnect the ignition amplifier electrical connector.

Turn on the ignition.

Measure the voltage between the wiring connector terminal and ground.

Checking the ground circuit - Figure 18

Technical conditions

Contacts	Position	Voltage
Screw and mass	Ignition ON	Maximum 0.1 V

Turn on the ignition.

Measure the voltage between the ignition amplifier mounting screw and ground.

Functionality check - Figure 19

Technical conditions

Contacts	Operation	Voltage
1 and (+) of the battery	Ignition OFF	Zero
1 and (+) of the battery	Ignition ON	Zero
1 and (+) battery	Starter cranking	Increase in voltage

Note: To prevent the engine from starting when cranking the engine, disconnect the injector connectors.

Make sure the ignition coil and ignition amplifier connectors are connected.

Strip the contacts of the low voltage terminals of the ignition coil.

Measure the voltage between coil 1 terminal and the "+" terminal of the battery.

Turn on the ignition.

Measure the voltage between coil 1 terminal and the "+" terminal of the battery.

(The original text can be found at: LRman.ru)

Turn the engine over with the starter.

Measure the voltage between coil 1 terminal and the "+" terminal of the battery.