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Home >> Toyota >> 2003 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 770 (Automatic Transmission Electronic Controlled (ECT) - A750E & A750F (2UZ-FE) - Diagnostics) >> DTC P0748: Pressure Control Solenoid "A" Electrical (Shift Solenoid Valve SL1) >> Inspection Procedure

Inspection Procedure

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HINT:

INSPECTION PROCEDURE CHART

ECM command gearshift 1st 2nd 3rd 4th 5th
Shift solenoid valve SL1 OFF OFF OFF OFF ON
  1. INSPECT TRANSMISSION WIRE(SL1) 
    1. Disconnect the transmission wire connector from the transmission.
    2. Measure the resistance according to the value(s) in the table below.

      Standard: 

      RESISTANCE CHART

      Tester Connection Specified Condition 20°C (68°F)
      12(SL1+)-4(SL1-) 5.0 to 5.6 Ω
    3. Measure the resistance according to the value(s) in the table below.

      Standard (Check for short): 

      Fig 1: Tester Connection Specified Condition (1 Of 2)
      G02584912Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 2: Inspecting Transmission Wire(Sl1)
      G02584913Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Go to step   3 
    2. OK: GO TO NEXT STEP. 
  2. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM) 
    1. Connect the transmission connector to the transmission.
    2. Disconnect the connector from the ECM.
    3. Measure the resistance according to the value(s) in the table below.

      Standard: 

      TESTER CONNECTION CHART (1 OF 2)

      Tester Connection Specified Condition 20°C(68°F)
      E5 - 19 (SL1+) - E5 - 18 (SL1-) 5.0 to 5.6 Ω
    4. Measure the resistance according to the value(s) in the table below.

      Standard (Check for short): 

      Fig 3: Disconnecting Connector From ECM
      G02584915Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 4: Tester Connection Specified Condition
      G02584914Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (SEE  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ) 
    2. OK: GO TO NEXT STEP. 

    REPLACE  ECM (2UZ-FE) 

  3. INSPECT SHIFT SOLENOID VALVE(SLI) 
    1. Remove the shift solenoid valve SL1.
    2. Measure the resistance according to the value(s) in the table below.

      Standard: 

      TESTER CONNECTION CHART (2 OF 2)

      Tester Connection Specified Condition 20°C (68°F)
      1 -2 5.0 to 5.6 Ω
    3. Connect the positive (+) lead with a 21 W bulb to terminal 2 and the negative (-) lead to terminal 1 of the solenoid valve connector, then check the movement of the valve.
      Fig 5: Removing Shift Solenoid Valve SL1
      G02584916Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: 

    The solenoid makes an operating sound. 

    1. NG: REPLACE SHIFT SOLENOID VALVE(SLI) (SEE  TRANSMISSION VALVE BODY ASSY (A750E/A750F)  ) 
    2. OK: GO TO NEXT STEP. 

    REPAIR OR REPLACE  TRANSMISSION WIRE (A750E/A750F)