Toyota Tacoma manuals

Toyota Corolla Repair Manual: Hydraulic test

1. Perform hydraulic test

  1. Measure the line pressure.

Notice

:

  1. Warm up the atf.
  2.  Remove the test plug on the transaxle case front left side and connect sst.

    Sst 0999200095 (0999200231, 0999200271)

  3.  fully apply the parking brake and chock the 4 wheels.
  4.  Connect an obd ii scan tool or handheld tester to the dlc3.
  5.  Start the engine and check the idling speed.
  6.  Keep your left foot pressed firmly on the brake pedal and shift into the d position.
  7.  Measure the line pressure when the engine is idling.
  8.  Depress the accelerator pedal all the way down.

    Quickly read the highest line pressure when the engine speed reaches the stall speed.

  9. Do the test in the r position in the same way.

Specified line pressure:

Evaluation:

Evaluation:

Problem

Possible cause

If the measured values at all positions are higher
  • Line pressure control solenoid (slt) defective
  • Regulator valve defective
If the measured values at all positions are lower
  • Line pressure control solenoid (slt) defective
  • regulator valve defective
  • oil pump defective
  • o/d direct clutch defective
If pressure is low in the d position only
  • D position circuit fluid leak
  • forward clutch defective
If pressure is low in the r position only
  • R position circuit fluid leak
  • direct clutch defective
  • 1st and reverse brake defective
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