2005 Lexus GX 470FACTORY OEM SERVICE PROCEDURE

Inspection Procedure

HINT:

Check which power window cannot be operated, and then proceed with the troubleshooting for the applicable power window as shown in POWER WINDOW TROUBLESHOOTING .

POWER WINDOW TROUBLESHOOTING

Position Go To Step
Passenger side  1
Rear LH  5
Rear RH  9
All  13
  1. CHECK MANUAL UP/DOWN FUNCTION (PASSENGER SIDE) 
    1. Check that the door glass can be operated by the power window switch.
    1. NG: OTHER PROBLEM (See  MANUAL UP/DOWN FUNCTION DOES NOT OPERATE AT PASSENGER SIDE   ) 
    2. OK: Go to next step. 
  2. INSPECT POWER WINDOW REGULATOR MASTER SWITCH ASSY 
    1. Using the hand-held tester, check operation of the master switch using the DATA LIST.

      Standard: 

      DATA LIST in D-DOOR ECU 

      DATA LIST IN D-DOOR ECU

      Measurement Item Label Parameter
      Passenger switch on master switch P P/W AUTO SW ON/OFF
    1. NG: REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSY 
    2. OK: Go to next step. 
  3. CHECK WIRE HARNESS (FOR POWER WINDOW SWITCH) 
    1. Disconnect the P7 power window switch connector.
    2. Turn the ignition switch ON.
    3. Using an oscilloscope, check the waveform of terminal 2 of the wire harness side connector when operating the passenger side switch of the power window master switch.
      Fig 1: Identifying Terminals Of Power Window Regulator Switch Assy Connector (Passenger Side)
      G02965819Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      The waveform is as shown in  Fig 2 . 

      Fig 2: Power Window Switch Waveform
      G02965820Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK: REPLACE POWER WINDOW REGULATOR SWITCH ASSY (PASSENGER SIDE) 
    2. NG: Go to next step. 
  4. CHECK WIRE HARNESS (POWER WINDOW SWITCH <==> BODY ECU) 
    1. Disconnect the B3 body ECU connector from the instrument panel J/B assy.
    2. Check the continuity between the terminals of the wire harness side connectors.

      Standard: 

      POWER WINDOW SWITCH TO BODY ECU CONTINUITY

      Terminal No. Specified Condition
      P7-2 <==> B3-11 Continuity
      P7-2 <==> Body ground No continuity
      Fig 3: Identifying Terminals Of Power Window Regulator Switch Assy (Passenger Side) & Instrument Panel J/B Assy (Body ECU) Connectors
      G02965821Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK: CHECK AND REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSY (BODY ECU) 
  5. CHECK MANUAL UP/DOWN FUNCTION (REAR LH) 
    1. Check that the power window can be operated by the power window switch.
    1. NG: OTHER PROBLEM (See  MANUAL UP/DOWN FUNCTION DOES NOT OPERATE AT REAR LH  ) 
    2. OK: Go to next step. 
  6. INSPECT POWER WINDOW REGULATOR MASTER SWITCH ASSY 
    1. Using the hand-held tester, check operation of the master switch using the data list.

      Standard: 

      Data list in D-DOOR ECU 

      DATA LIST IN D-DOOR ECU

      Measurement Item Label Parameter
      Rear LH switch on master switch RL P/W AUTO SW ON/OFF
    1. NG: REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSY 
    2. OK: Go to next step. 
  7. CHECK WIRE HARNESS (FOR POWER WINDOW SWITCH) 
    1. Disconnect the P8 power window switch connector.
    2. Turn the ignition switch ON.
    3. Using an oscilloscope, check the waveform of terminal 2 of the wire harness side connector when operating the rear LH switch of the master switch.
      Fig 4: Identifying Terminals Of Power Window Regulator Switch Assy Rear LH Connector
      G02965822Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      The waveform is as shown in  Fig 5 . 

      Fig 5: Power Window Switch Waveform
      G02965823Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK: REPLACE POWER WINDOW REGULATOR SWITCH ASSY REAR (REAR LH) 
    2. NG: Go to next step. 
  8. CHECK WIRE HARNESS (POWER WINDOW SWITCH <==> BODY ECU) 
    1. Disconnect the B4 body ECU connector from the instrument panel J/B assy.
    2. Check the continuity between the terminals of the wire harness side connectors.

      Standard: 

      POWER WINDOW SWITCH TO BODY ECU CONTINUITY

      Terminal No. Specified Condition
      P8-2 <==> B4-14 Continuity
      P8-2 <==> Body ground No continuity
      Fig 6: Identifying Terminals Of Power Window Regulator Switch Assy & Instrument Panel J/B Assy (Body ECU) Connectors
      G02965824Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK: CHECK AND REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSY (BODY ECU) 
  9. CHECK MANUAL UP/DOWN FUNCTION (REAR LH) 
    1. Check that the power window can be operated by the power window switch.
    1. NG: OTHER PROBLEM (See  MANUAL UP/DOWN FUNCTION DOES NOT OPERATE AT REAR RH   ) 
    2. OK: Go to next step. 
  10. INSPECT POWER WINDOW REGULATOR MASTER SWITCH ASSY 
    1. Using the hand-held tester, check operation of the master switch using the data list.

      Standard: 

      Data list in D-DOOR ECU 

      DATA LIST IN D-DOOR ECU

      Measurement Item Label Parameter
      Rear RH switch on master switch RR P/W AUTO SW ON/OFF
    1. NG: REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSY 
    2. OK: Go to next step. 
  11. CHECK WIRE HARNESS (FOR POWER WINDOW SWITCH) 
    1. Disconnect the P9 power window switch connector.
    2. Turn the ignition switch ON.
    3. Using an oscilloscope, check the waveform of terminal 2 of the wire harness side connector when operating the rear RH switch of the master switch.
      Fig 7: Identifying Terminals Of Power Window Regulator Switch Assy Connector (Rear RH)
      G02965825Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      The waveform is as shown in  Fig 8 . 

      Fig 8: Power Window Switch Waveform
      G02965826Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK: REPLACE POWER WINDOW REGULATOR SWITCH ASSY REAR (REAR RH) 
    2. NG: Go to next step. 
  12. CHECK WIRE HARNESS (POWER WINDOW SWITCH <==> BODY ECU) 
    1. Disconnect the B4 body ECU connector from the instrument panel J/B assy.
    2. Check the continuity between the terminals of the wire harness side connectors.

      Standard: 

      POWER WINDOW SWITCH TO BODY ECU CONTINUITY

      Terminal No. Specified Condition
      P9-2 <==> B4-16 Continuity
      P9-2 <==> Body ground No continuity
      Fig 9: Identifying Terminals Of Power Window Regulator Switch Assy (Rear RH) & Instrument Panel J/B Assy (Body ECU) Connectors
      G02965827Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK: CHECK AND REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSY (BODY ECU) 
  13. CHECK POWER WINDOW LOCK SWITCH 
    1. Turn the window lock switch OFF and check that the remote function operates.
    1. OK: END 
    2. NG: Go to next step. 
  14. INSPECT POWER WINDOW REGULATOR MASTER SWITCH ASSY (FOR WINDOW LOCK SWITCH) 
    1. Remove the master switch (the connector is connected).
    2. Turn the ignition switch ON.
    3. Check the voltage between terminal 6 and the body ground when operating the window lock switch on the master switch.

      Standard: 

      Fig 10: Power Window Regulator Master Switch Assy (For Window Lock Switch) Voltage Table
      G02965828Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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