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Home >> Mazda >> 1986 >> B2000 Base, 2D Pickup >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Deceleration Control System >> System Testing >> Coasting Richer System
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Coasting Richer System

  1. Bring engine to normal operating temperature and run at idle. Disconnect neutral switch connector. Connect a voltmeter to the Brown/Black wire side of check connector and verify a voltage reading of 12 volts. See Fig 1 .
    Fig 1: Check Connector Terminal
    G36850
  2. Connect a tachometer. Hold idle switch from accelerator and increase engine speed to 2500 RPM. Decelerate while monitoring voltage reading. Voltage reading should be 12 volts above 2000 RPM, 1.5 volts at 1400-2000 RPM and 12 volts below 1400 RPM.
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