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Fox 1.8L Digifant I (California)

  1. Ensure Hall Effect sensor and its circuit is okay. Disconnect fuel injector wiring harness. Using test leads from Adapter Kit (VW 1594), connect LED Tester (US 1115) to fuel injector wiring harness connector terminals No. 1 and 5.
  2. Crank engine and observe LED tester. LED tester must flicker. Repeat injector circuit test using terminals No. 2 and 5, No. 3 and 5, and terminals No. 4 and 5.
  3. If LED tester flickers on all injector circuits, turn ignition off. Measure individual fuel injector resistance between terminals No. 1 and 5, No. 2 and 5, No. 3 and 5, and terminals No. 4 and 5. Individual injector resistance must be 15.0-20.0 ohms. If necessary, replace injector(s).
  4. If LED lights up continuously, repair ground wire between battery and transmission. If LED does not flicker or light up, check fuel injector wiring harness for an open circuit back to ECM. If wiring harness is okay, replace ECM.
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