Vehicle ignition system Volkswagen Passat B3

General information about the ignition system
The ignition system produces an electric spark for each cylinder of a gasoline engine at the right time. This spark ignites the fuel-air mixture entering the cylinder. In the...

Ignition system TSZ-H
1 — TSZ switch Location: Front right under the water drainage cover. 2 - high voltage wire 3 - tip with noise suppression resistor 4 — terminal 4 5 — terminal 15 (+) 6 — terminal...

Ignition system VEZ
1 — VEZ control unit On the right, under the water drainage cover. 2 - connecting plug 3 - vacuum pipeline 4 — throttle position sensor 5 - connecting plug 6 — TSZ-H switch On the...

Digifant Ignition System
Ignition distributor, ignition coil, spark plug 1 - high voltage wire 2 - tip with noise suppression resistor 3 — screen 4 — distributor cap 5 - carbon brush with spring 6 —...

Precautions when working with electronic ignition systems
In electronic ignition systems, high voltage can be up to 30 kV (kilovolts). To avoid injury and/or damage to the electronic ignition system, pay attention to the following when...

Checking the ignition coil
The ignition coil can be checked with an ohmmeter. Disconnect the ground cable from the battery. Remove the ignition coil cover and disconnect the terminals from the coil. 1st...

Checking high voltage wires
Disconnect the ground cable from the battery. Remove the spark plug cap. Remove the high tension wires from the distributor cap and ignition coil. Caution: Remove by the tips, not...

Checking the distributor rotor
For the ignition spark to function properly, the resistance of the distributor rotor must not be too high. Remove the distributor cap. Connect an ohmmeter to the distributor...

Distributor of ignition systems TSZ and Digifant
1 — distributor runner 2 - dust cap 3 - retaining ring 4 - rotary diaphragm 5 - pin 6 - spring washer 7 - connecting plug When disconnecting and connecting, the ignition must be...

Removal and installation the ignition distributor
Complete removal of the ignition distributor is only necessary for major repairs. On engines with VEZ and Ke-Motronic systems, the ignition distributor is located on the side of...

Checking the TSZ-H system switch
TSZ, VEZ, Digifant systems Caution: To avoid damage to electronic components, perform the following operations only with the ignition off: disconnecting and connecting plugs;...

Checking the Hall sensor
Note: Checking the Hall sensor is only required if there is no ignition spark. TSZ-H, Digifant systems Check the TSZ-H switch, the same plug and wires to the ignition distributor....

Adjusting the ignition timing and checking the knock sensor
Digifant Ignition System Caution: If the knock sensor adjustment was changed during the test, the engine must be stopped afterwards. Then the engine must be started again to check...

Checking/adjusting ignition timing
A crankshaft speed meter and a stroboscope are used for checking and adjustment (ignition timing flash lamp). Warm up the engine to normal operating temperature. Operating...

Ignition timing angle values
Note: When adjusting the ignition timing, it is necessary to determine whether the vacuum hose from the vacuum ignition timing regulator on the distributor should be disconnected...

Spark plugs
The spark plug consists of an insulator, a housing, a central electrode, and a ground electrode. The central electrode is hermetically secured in the insulator, and the insulator...

Checking the distributor cap
Remove the distributor cap by using a screwdriver to press the two clamps on the side. The lid should be dry inside. Check the internal contacts for wear and corrosion, if...

Checking electrical connections
Check the reliability of all electrical connections at the ignition coil and distributor. Remove corrosion at the connection points using a wire brush or file; if necessary, spray...

Removal and installation spark plugs
VW Passat vehicles are equipped with so-called long-life spark plugs. Depending on the version, the long service life of the spark plugs is achieved by three ground electrodes or...

Ignition system fault diagnostics
Malfunction: The engine starts poorly or does not start at all.

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