Volkswagen Golf/Jetta 2 manual

Control unit - testing
Ignition system - fully electronic type / Control unit - testing


1 Test the switch unit before checking the control unit.

2 Release the spring and pull the connector from the control unit located in the right-hand side of the plenum chamber.

3 Switch on the ignition, then use a voltmeter to check that battery voltage is available between terminals 3 and 5 on the connector (see illustration).

5.3 FEI control unit connector terminals
5.3 FEI control unit connector terminals

4 Check also that battery voltage is available between terminals 6 and 3, then operate the throttle valve switch and check that the voltage drops to zero. Switch off the ignition.

5 Using an ohmmeter, measure the resistance between the connector terminals 1 to 3. These are the temperature sender terminals and the resistance varies according to the coolant temperature.

6 Press the clip and pull the connector from the side of the distributor. Connect the voltmeter to the two outer terminals of the connector, then switch on the ignition. A reading of 5 volts should be registered.

Switch off the ignition.

7 Connect a voltmeter across the low tension terminals of the ignition coil. Switch on the ignition.

8 Using a temporary length of wire, briefly earth the centre terminal of the distributor connector. The voltage should rise to at least 2 volts and the fuel pump should be heard to operate. If this is not the case, renew the control unit and if necessary check the fuel pump relay.


© 2018 www.vwgolfjetta2.ru. All Rights Reserved.