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Home >> Nissan-Datsun >> 1982 >> 280ZX Base, 2.8L Eng VIN C, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Electronic Concentrated Engine Control >> Testing >> Component Testing >> Vacuum Control Modulator
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Vacuum Control Modulator

  1. Connect battery ground cable and turn ignition on. Measure voltage between control unit connector terminal 2 and ground. Battery voltage should be present.
  2. Check for battery voltage between terminal 4 and ground. If voltage is present in both checks, modulator solenoid valves are okay. If not, disconnect both connectors at modulator.
  3. Check resistance between terminals for each solenoid valve on modulator. Resistance should be 40 ohms for each valve. If not, replace vacuum control modulator.
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