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Boost Sensor Output Check No. 1

  1. Using a voltmeter, check for 2-3 volts on Light Green/Yellow wire at boost valve sensor 4-pin connector. See IDENTIFYING BOOST SENSOR 4-PIN CONNECTOR illustration. Boost valve connector is located at turbo boost sensor, near center of firewall.
  2. Observe voltmeter reading. If voltmeter reads 2-3 volts, go to BOOST GAUGE SENSOR OUTPUT CHECK NO. 2. If voltmeter does not read 2-3 volts, go to BOOST SENSOR GROUND CHECK.