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Inspection Procedure

NOTE: When replacing the master cylinder solenoid, perform zero point calibration (See CALIBRATION  ).
  1. READ VALUE USING TECHSTREAM (ACCUMULATOR PRESSURE SENSOR) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch off.
    3. Depress the brake pedal more than 20 times.
    4. Turn the ignition switch to ON and turn the Techstream main switch ON.
    5. Select "Data List" mode on the Techstream.

      ABS/VSC/TRAC 

      DATA LIST REFERENCE

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Accumulator Sensor Accumulator pressure sensor reading/Min.: 0 V, Max.: 5 V 3.58 to 5 V If the value Is constant regardless of pump operation, accumulator pressure sensor malfunction is suspected.
    6. Check the accumulator output value.

      Result 

      DTC RESULT REFERENCE

      Result Proceed to
      Output value Is within the "Normal Condition" range A
      Output value is out of the "Normal Condition" range B
      Output value Is constant regardless of pump operation B

      B: REPLACE MASTER CYLINDER SOLENOID 

      A: Go to next step 

  2. READ VALUE USING TECHSTREAM (MASTER CYLINDER PRESSURE SENSOR) 
    1. Turn the ignition switch off.
    2. Depress the brake pedal more than 20 times.
    3. Install the brake pedal effort gauge (SST), and bleed air.

      SST 09709-29018 

    4. Turn the ignition switch to ON and turn the Techstream main switch ON.
    5. Select "Data List" mode on the Techstream.

      ABS/VSC/TRAC 

      DATA LIST REFERENCE

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Master Cylinder Sensor1 Master cylinder pressure sensor reading/Min.: 0 V, Max.: 5 V When brake pedal is released: 0.3 to 0.9 V Reading increases when brake pedal is depressed
    6. Check that the master cylinder pressure sensor's output value is normal.

      OK: 

      Master cylinder pressure sensor value is normal. 

      NG: REPLACE MASTER CYLINDER SOLENOID 

      OK: Go to next step 

  3. RECONFIRM DTC 
    1. Clear the DTC (See DTC CHECK/CLEAR  ).
    2. Turn the ignition switch off.
    3. Depress the brake pedal more than 20 times.
    4. Turn the ignition switch to ON.
    5. Wait until the pump motor stops.
    6. Depress the brake pedal and release it.
    7. Wait for 25 minutes.
    8. Check if the same DTC is detected (See DTC CHECK/CLEAR  ).

      Result 

      DTC RESULT REFERENCE

      Result Proceed to
      DTC Is output A
      DTC is not output B

      B: CHECK FOR INTERMITTENT PROBLEMS  (See CHECK FOR INTERMITTENT PROBLEMS  )

      A: REPLACE MASTER CYLINDER SOLENOID 

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