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Home >> Chrysler >> 2007 >> Pacifica Base, 3.8 L >> Repair and Diagnosis >> Steering >> Rack & Pinion Power Steering System >> Diagnosis And Testing >> Power Steering Flow And Pressure Test >> Test Procedure

Test Procedure

  1. Completely open valve on Power Steering Analyzer flow meter.
  2. Start engine and let idle long enough to circulate power steering fluid through Analyzer and hoses, until all air is out of fluid. Shut off engine.
  3. Check power steering fluid level and add fluid as necessary. Start engine again and let idle.
  4. The Analyzer gauge should read below 300 psi (2068 kPa). If above, inspect hoses for restrictions and repair as necessary. The initial pressure should be in range of 100-175 psi (689-1896 kPa). The flow meter should read above 1.5 GPM (5.7 LPM).
    CAUTION: The following test procedure step involves testing maximum pump pressure output and flow control valve operation. Do not leave valve closed for more than five seconds as the pump could be damaged.
    NOTE: Power steering pump maximum pressure is 1,400 - 1,500 psi (9,653 - 10,342 kPa).
  5. Close flow meter valve fully three times and record highest pressure indicated each time. All three readings must be within specifications. If any of readings are not within specifications, replace pump.  . See REMOVAL .
    CAUTION: During the next step, do not force the pump to operate against the stops for more than 4 seconds at a time as pump damage may result.
  6. Once pump has been verified as functioning correctly, completely open valve on Power Steering Analyzer flow meter. Turn steering wheel to extreme left until stop in steering gear is met. Hold it there for 2 - 4 seconds, then release it. Now turn steering wheel to right until right stop is met. Hold it there for 2 - 4 seconds, then release it. Record stabilized pressure at each position. Compare recorded readings to specifications. If output pressures are not within 100 psi (689 kPa) of one another or are below specifications steering gear is leaking internally and must be replaced. See REMOVAL .
    NOTE: Before installing power steering hose on power steering gear, wipe clean connections with a lint-free cloth and replace O-ring. Lubricate O-ring using clean power steering fluid.
  7. Remove special tools and reconnect pressure hose. Tighten tube nut to specifications. See SPECIFICATIONS .
  8. Fill and bleed system. See STANDARD PROCEDURE .
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