IGNITION CONTROL SIGNAL CHECK

Check 5510CE

1.2 8v

Connect ammeter pliers N° 1806505000 to the diagnostic equipment using cable EX01.

There are two red LEDs in the grip of the pliers which light up when the ammeter pliers are open and warn the operator not to take any current measurements because they would be incorrect

Position the pliers with the jaws closed and the red LEDs off, near the measurement point.

Zero the pliers using the CALIBRATION button.

On account of the extreme sensitivity of the instrument it is normal that if the pliers are rotated in the air the reading varies by several mA

Position the wire connected to pin 2 of the ignition coil (primary control cable) so that it passes inside the ammeter pliers jaws and, before taking a reading, make sure that the red LEDs in the pliers are off.

Select the INSTRUMENT mode on the diagnostic equipment and then the AMMETER function.

Select 10 A PLIERS.

Select the time base at 1 sec.

Press the Start button and turn the ignition switch to the AVV position

The diagram below shows normal coil primary winding current uptake with the engine warm and idling.

Repeat the same test by alternately touching the wire connected to pin 3 - 4- 5 of the ignition coil and check for the same signal as shown below.

Ignition signal with normal pattern.

Interrupted or earthed ignition signal.

If the ignition control signals to the coils are not present, check the continuity and insulation to earth of the wiring between the ignition coil and the engine control unit

1.4 16v

Connect the ammeter pliers N° 1806505000 to the diagnostic equipment using the EX01 cable.

There are two red LEDs in the grip of the pliers which light up when the ammeter pliers are open and warn the operator not to take any current measurements because they would be incorrect

Position the pliers with the jaws closed and the red LEDs off, near the measurement point.

Zero the pliers using the CALIBRATION button.

On account of the extreme sensitivity of the instrument it is normal that if the pliers are rotated in the air the reading varies by several mA

Position the wire connected to pin 1 of the ignition coil (primary control cable) so that it passes inside the ammeter plier jaws and, before taking a reading, make sure that the red LEDs in the pliers are off.

Select the INSTRUMENT mode on the diagnostic equipment and then the AMMETER function.

Select 10 A PLIERS.

Select the time base at 1 sec.

Press the Start button and turn the ignition switch to the AVV position

The diagram below shows normal coil primary winding current uptake with the engine warm and idling.

Repeat the same test but positioned on the wire connected to pin 1 of the other ignition coil and check for the same signal as shown below.

Ignition signal with normal pattern

Interrupted or earthed ignition signal.

If the ignition control signals to the coils are not present, check the continuity and insulation to earth of the following wiring:

• between ignition coils and engine control unit