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Home >> Toyota >> 2008 >> FJ Cruiser RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 5 (Automatic Transmission - A750F) >> Automatic Transmission System >> DTC P0748: Pressure Control Solenoid "A" Electrical (Shift Solenoid Valve SL1) >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2006 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

The shift solenoid valve SL1 turns ON/OFF normally when the shift lever is on D:

SHIFT SOLENOID VALVE SL1 POSITION

ECM gear shift command 1st 2nd 3rd 4th 5th
Shift solenoid valve SL1 OFF OFF OFF OFF ON
  1. INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE SL1) 
    1. Disconnect the E1 wire connector.
    2. Measure the resistance of the transmission wire.

      Standard resistance 

      TERMINALS RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      12 (SL1+) - 4 (SL1-) 20°C (68°F) 5.0 to 5.6 Ω
      12 (SL1+) - Body ground 20°C (68°F) 10 kΩ or higher
      4 (SL1-) - Body ground 20°C (68°F) 10 kΩ or higher

    NG: Go to step   3 

    Fig 1: Identifying Transmission Wire Connector
    G04436472Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: GO TO NEXT STEP 

  2. CHECK WIRE HARNESS (TRANSMISSION WIRE - ECM) 
    1. Disconnect the E6 ECM connector.
    2. Measure the resistance of the wire harness side connector.

      Standard resistance 

      TERMINALS RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      E6-19 (SL1+) - E6-18 (SL1-) 20°C (68°F) 5.0 to 5.6 Ω
      E6-19 (SL1+) - Body ground 20°C (68°F) 10 kΩ or higher
      E6-18 (SL1-) - Body ground 20°C (68°F) 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    Fig 2: Disconnecting E6 ECM Connector
    G04436473Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPLACE ECM 

  3. INSPECT SHIFT SOLENOID VALVE SL1 
    1. Remove the shift solenoid valve SL1.
    2. Measure the resistance of the solenoid valve.

      Standard resistance: 5.0 to 5.6 Ω at 20°C (68°F) 

    3. Connect the battery's positive (+) lead to the terminal of the solenoid connector, and the negative (-) lead to the solenoid body.

      OK: Solenoid makes operating noise. 

    NG: REPLACE SHIFT SOLENOID VALVE SL1 

    Fig 3: Measuring Resistance Of Solenoid Valve SL1 Terminals
    G04436474Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPAIR OR REPLACE TRANSMISSION WIRE