Ignition Control Unit (All Models Except VANAGON)

1. Perform SPARK TEST in BASIC TESTING article. If secondary spark is present, ignition control unit is okay. If secondary spark is not present, turn ignition off. Disconnect ignition control unit wire harness connector. Turn ignition on. Using a voltmeter, measure voltage between terminals No. 2 (negative) and terminal No. 4 (positive) of connector. See Fig 1 .
2. Voltage should be present. If voltage is not present, ensure continuity exists between control unit connector terminal No. 2 and ground. Continuity should also exist between terminal No. 4 and ignition coil positive terminal. Repair wiring if necessary. If wiring is okay, replace ignition control unit.

Fig 1: Identifying Typical Ignition Control Unit Connector

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Fig 2: Locating AFC-Digifant II Components (Vanagon)

Courtesy of VOLKSWAGEN UNITED STATES, INC.