Checking the Hall sensor (VW Transporter T3)

Test conditions: The ignition system switching unit is functioning normally, the connection between the ignition system switching unit and the ignition distributor is normal.

Disconnect the connectors of the idle speed control system switching unit and connect them together.

Disconnect the high-voltage wire from terminal 4 of the ignition distributor and connect it to ground with a jumper.

Pull the rubber boot down from the ignition system switching unit connector. Do not disconnect the connector.

Please note: The specified values are valid for ambient temperatures from 0 to +40°C.

(The original article is available at: vwmanual)

Connect the voltmeter to terminals b and 3.

Turn on the ignition.

Slowly turn the engine by hand and observe the voltmeter readings.

Caution: When the engine rotates, the relative position of the disk and the magnetic core of the Hall sensor in the ignition distributor changes. Specified value: The voltage should change from 0 to at least 2 volts. Otherwise, replace the Hall sensor.

The figure shows the position when the core "2" is above the disk.

Connect the DLS connectors.