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Turbocharger Pressure Check

  1. Disconnect turbocharger pressure control hose at wastegate solenoid valve (attached to air cleaner) and plug nipple. Attach pressure gauge to hose. See Fig 1 .
  2. Drive vehicle and accelerate engine in second gear to more than 3500 RPM. Measure turbocharger pressure when pressure gauge stabilizes. Pressure gauge should read 6-11 psi (.4-.8 kg/cm2 ).
  3. If pressure gauge reads higher than specified, check wastegate actuator. See WASTEGATE ACTUATOR TEST. Replace wastegate actuator as required. If pressure gauge reads lower than specified, go to next step.
  4. Check wastegate actuator. See WASTEGATE ACTUATOR TEST. Replace wastegate actuator as required. Also, check for turbocharger pressure leaks and faulty turbocharger.
    Fig 1: Testing Turbocharger Pressure
    G90C06282
    CAUTION: When testing wastegate actuator, DO NOT  apply more than 12 psi (.9 kg/cm2 ) to wastegate actuator. On all models, check that wastegate actuator rod moves. Replace wastegate actuator if rod does not move or actuator does not hold pressure.
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