Ignition coil — function and operation (Aprilia Shiver 750)

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Function

Spark generation.

Operating principle

Inductive discharge system.

Level in wiring diagram:coils and injectors.

Location:

• on the vehicle: on the cylinder head
• connector (if available): -

Electrical characteristics:

• Primary circuit resistance: approx. 1 Ohm at 20°C between PIN 1 and 3.
• Secondary circuit resistance: MOhm value range (with positive probe on coil).

Pin-out:

Caution! Before carrying out any troubleshooting, carefully read the general troubleshooting concepts for electrical devices at the beginning of the check and control section in the electrical system chapter.

Axone: parameters

Rear coil ignition advance

Front coil ignition advance

Axone: activations

Front coil

The auxiliary injection relay (No. 42 in the wiring diagram, placed under fuel tank, right side, third relay starting from the front; CHECK, however, the identification of the relay with the colour of the cables) is energised for 5 seconds and the sky blue/orange cable of the coil is closed to ground for 2 ms per second. Disconnect the 4-way connector of the fuel pump to be able to hear the relay and injector activation. The continuity of the wiring is necessary for correct activation: no error indications are displayed in case of lack of activation.

Rear coil

The auxiliary injection relay (No. 42 in the wiring diagram, placed under fuel tank, right side, third relay starting from the front; CHECK, however, the identification of the relay with the colour of the cables) is energised for 5 seconds and the sky blue/green cable of the coil is closed to ground for 2 ms per second. Disconnect the 4-way connector of the fuel pump to be able to hear the relay and injector activation. The continuity of the wiring is necessary for correct activation: no error indications are displayed in case of lack of activation.

Axone: electrical errors

Lambda probe P0130 - shorted to positive / circuit, shorted to negative

Error cause

If shorted to positive: excessive voltage has been detected at PIN 17 of the ENGINE connector. If the circuit is open, shorted to negative: voltage equal to zero has been detected at PIN 17 of the ENGINE connector.


Troubleshooting

if shorted to positive: disconnect the coil connector, set the key to ON, activate the coil with Axone and check voltage at connector PIN 3: if there is voltage, restore the cable harness; if voltage = 0, replace the coil. Open circuit, shorted to negative: check the coil connector and the Marelli control unit connector. If not OK, restore; if everything is OK, check cable continuity between the two cable terminals. If there is no continuity, restore the cable harness; if there is cable continuity, with key set to ON, check the cable earth insulation (from coil connector or control unit connector). If not OK, restore the cable harness.

Rear coil P0352 - shorted to positive / open circuit, shorted to negative.

Error cause

If shorted to positive: excessive voltage has been detected at PIN 19 of the ENGINE connector.

If the circuit is open, shorted to negative: voltage equal to zero has been detected at PIN 19 of the ENGINE connector.

Troubleshooting

If shorted to positive: disconnect the coil connector, set the key to ON, activate the coil with Axone and check voltage at connector PIN 3: if there is voltage, restore the cable harness; if voltage = 0, replace the coil.

If the circuit is open, shorted to negative: check the coil connector and the Marelli control unit connector. If not OK, restore; if everything is OK, check cable continuity between the two cable terminals. If there is no continuity, restore the cable harness; if there is cable continuity, with key set to ON, check the cable earth insulation (from coil connector or control unit connector). If not OK, restore the cable harness.

See this article in russian language

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Article about repair motorcycles «Aprilia Shiver SL 750» (2007-2016): «Ignition coil — function and operation»: https://motoinstruction.ru/en/Aprilia/Shiver/SL750/electric/equipment/114562 <a href="https://motoinstruction.ru/en/Aprilia/Shiver/SL750/electric/equipment/114562">Ignition coil — function and operation</a> - article about repair motorcycles «Aprilia Shiver SL 750» (2007-2016) from section «Equipment and devices». [url=https://motoinstruction.ru/en/Aprilia/Shiver/SL750/electric/equipment/114562]Ignition coil — function and operation[/url] - article about repair motorcycles «Aprilia Shiver SL 750» (2007-2016) from section «Equipment and devices».