Ignition System

PROCEDURE

The Golf and Jetta use two types of ignition systems. Engines with displacements of 1.1, 1.3 and 1.6 L use a conventional ignition system. Engines with a displacement of 1.6 L have been equipped with the TSZ-H transistorized ignition system since January 1985, the same as engines with a displacement of 1.8 L. Since July 1985, the MH engine has replaced the NK engine with a displacement of 1.3 L, equipped with the TSZ-H transistorized ignition system. Engines of types MH, GU, EU, GX, KR and RH use the TSZ-H transistorized ignition system. Engines of types RD, RG, PL and HT use VEZ electronic ignition. Engines of types PE, PB, IP and 1H are equipped with Digifant fuel injection; their VEZ ignition system shares a control unit with the fuel injection system. The conventional ignition system uses a distributor with contacts. When the contacts open, voltage is induced in the secondary winding of the ignition coil. High voltage from the secondary winding is supplied to the spark plugs. To reduce arcing at the contacts, a capacitor is mounted on the side of the distributor. The TSZ-H transistorized ignition system is contactless. Instead of a breaker with contacts, the distributor has a Hall sensor consisting of a winding and a permanent magnet. The control module amplifies the voltage induced in the Hall sensor winding. VEZ electronic ignition is a transistorized ignition system with electronic control. The electronic control unit receives information from various sensors on engine load, crankshaft speed, etc., and determines the optimum ignition advance angle.