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Proportioning Valve Function Test

  1. Attach 2 pressure gauges that measures at least 2000 psi (140.6 kg/cm2 ), to the input and output side of proportioning valve. See Fig 1 . Measure the input and output pressure with brakes applied. See Fig 2 .
  2. If measured pressures are NOT within range, replace proportioning valve. Measure both left and right pressure readings. If the difference in pressure is 60 psi (27 kg/cm2 ) or more, replace proportioning valve. DO NOT disassemble proportioning valve.
Fig 1: Testing Proportioning Valve
G52081Courtesy of HYUNDAI MOTOR CO.
Fig 2: Proportioning Valve Pressure Chart
G90B00977Courtesy of HYUNDAI MOTOR CO.
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