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Power-To-ECU Test

Turn ignition off. Unplug ECU connector. Turn ignition on. Using a voltmeter, check voltage between ECU connector terminals No. 1 and 2. See Fig 1 . If voltage is 10 volts or more, go to next test. If voltage is less than 10 volts, check battery, ground, ABS fuse, relay and wiring. Repair as necessary.

Fig 1: Identifying ECU Connector Terminals
G91B02679Courtesy of VOLKSWAGEN UNITED STATES, INC.