2008 Lexus LX 570FACTORY OEM SERVICE PROCEDURE

Terminals Of Ecu

  1. CHECK FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LHΒ 
    Fig 1: Identifying I12 Connector Terminal
    G05767403Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the I12 motor connector.
    2. Measure the resistance and voltage according to the value(s) in the table below.
      RESISTANCE AND VOLTAGE SPECIFICATION

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      I12-2 (B) - I12-1 (GND) L - W-B Battery power supply Always 11 to 14 V
      I12-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ξ©

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Reconnect the I12 motor connector.
    4. Measure the voltage according to the value(s) in the table below.
      VOLTAGE SPECIFICATION

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      I12-10 (UP) - I12-1 (GND) L - W-B Power window up operation Engine switch on (IG), multiplex network master switch off β†’ up 11 to 14 V β†’ Below 1 V
      I12-10 (UP) - I12-1 (GND) L - W-B Power window up operation Engine switch on (IG), door glass fully open β†’ power window auto up operation β†’ door glass fully closed 11 to 14 V β†’ Below 1 V β†’ 11 to 14 V
      I12-7 (DOWN) - I12-1 (GND) B - W-B Power window down operation Engine switch on (IG), multiplex network master switch off β†’ down 11 to 14 V β†’ Below 1 V
      I12-7 (DOWN) - I12-1 (GND) B - W-B Power window down operation Engine switch on (IG), door glass fully closed β†’ power window auto down operation β†’ door glass fully open 11 to 14 V β†’ Below 1 V β†’ 11 to 14 V

      If the result is not as specified, the motor may be malfunctioning.

  2. CHECK FRONT POWER WINDOW REGULATOR MOTOR RHΒ 
    Fig 2: Identifying I4 Connector Terminal
    G05636287Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the I4 motor connector.
    2. Measure the resistance and voltage according to the value(s) in the table below.
      RESISTANCE AND VOLTAGE SPECIFICATION

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      I4-2 (B) - I4-1 (GND) L - W-B Battery power supply Always 11 to 14 V
      I4-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ξ©

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Reconnect the I4 motor connector.
    4. Measure the voltage according to the value(s) in the table below.
      VOLTAGE SPECIFICATION

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      I4-10 (UP) - I4-1 (GND) L - W-B Power window up operation Engine switch on (IG), power window regulator switch off β†’ up 11 to 14 V β†’ Below 1 V
      I4-10 (UP) - I4-1 (GND) L - W-B Power window up operation Engine switch on (IG), door glass fully open β†’ power window auto up operation β†’ door glass fully closed 11 to 14 V β†’ Below 1 V β†’ 11 to 14 V
      I4-7 (DOWN) - I4-1 (GND) B - W-B Power window down operation Engine switch on (IG), power window regulator switch off β†’ down 11 to 14 V β†’ Below 1 V
      I4-7 (DOWN) - I4-1 (GND) B - W-B Power window down operation Engine switch on (IG), door glass fully closed β†’ power window auto down operation β†’ door glass fully open 11 to 14 V β†’ Below 1 V β†’ 11 to 14 V

      If the result is not as specified, the motor may be malfunctioning.

  3. CHECK REAR POWER WINDOW REGULATOR MOTOR LHΒ 
    Fig 3: Identifying J11 Connector Terminal
    G05636288Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the J11 motor connector.
    2. Measure the resistance and voltage according to the value(s) in the table below.
      RESISTANCE AND VOLTAGE SPECIFICATION

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      J11-2 (B) - J11-1 (GND) L - W-B Battery power supply Always 11 to 14 V
      J11-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ξ©

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Reconnect the J11 motor connector.
    4. Measure the voltage according to the value(s) in the table below.
      VOLTAGE SPECIFICATION

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      J11-10 (UP) - J11-1 (GND) L - W-B Power window up operation Engine switch on (IG), power window regulator switch off β†’ up 11 to 14 V β†’ Below 1 V
      J11-10 (UP) - J11-1 (GND) L - W-B Power window up operation Engine switch on (IG), door glass fully open β†’ power window auto up operation β†’ door glass fully closed 11 to 14 V β†’ Below 1 V β†’ 11 to 14 V
      J11-7 (DOWN) - J11-1 (GND) B - W-B Power window down operation Engine switch on (IG), power window regulator switch off β†’ down 11 to 14 V β†’ Below 1 V
      J11-7 (DOWN) - J11-1 (GND) B - W-B Power window down operation Engine switch on (IG), door glass fully closed β†’ power window auto down operation β†’ door glass fully open 11 to 14 V β†’ Below 1 V β†’ 11 to 14 V

      If the result is not as specified, the motor may be malfunctioning

  4. CHECK REAR POWER WINDOW REGULATOR MOTOR RHΒ 
    Fig 4: Identifying J4 Connector Terminal
    G05636289Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the J4 motor connector.
    2. Measure the resistance and voltage according to the value(s) in the table below.
      RESISTANCE AND VOLTAGE SPECIFICATION

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      J4-2 (B) - J4-1 (GND) L - W-B Battery power supply Always 11 to 14 V
      J4-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ξ©

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Reconnect the J4 motor connector.
    4. Measure the voltage according to the value(s) in the table below.
      VOLTAGE SPECIFICATION

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      J4-10 (UP) - J4-1 (GND) L - W-B Power window up operation Engine switch on (IG), power window regulator switch off β†’ up 11 to 14 V β†’ Below 1 V
      J4-10 (UP) - J4-1 (GND) L - W-B Power window up operation Engine switch on (IG), door glass fully open β†’ power window auto up operation β†’ door glass fully closed 11 to 14 V β†’ Below 1 V β†’ 11 to 14 V
      J4-7 (DOWN) - J4-1 (GND) B - W-B Power window down operation Engine switch on (IG), power window regulator switch off β†’ down 11 to 14 V β†’ Below 1 V
      J4-7 (DOWN) - J4-1 (GND) B - W-B Power window down operation Engine switch on (IG), door glass fully closed β†’ power window auto down operation β†’ door glass fully open 11 to 14 V β†’ Below 1 V β†’ 11 to 14 V

      If the result is not as specified, the motor may be malfunctioning.

  5. CHECK MULTIPLEX NETWORK MASTER SWITCHΒ 
    Fig 5: Identifying I11 Connector Terminal
    G05636290Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the I11 master switch connector
    2. Measure the resistance and voltage according to the value(s) in the table below.
      RESISTANCE AND VOLTAGE SPECIFICATION

      Terminal No (Symbol) Wiring Color Terminal Description Condition Specified Condition
      I11-11 (B) - I11-12 (GND) L - W-B Battery power supply Always 11 to 14 V
      I11-12 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ξ©

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Reconnect the I11 master switch connector
    4. Measure the voltage according to the value(s) in the table below.
      VOLTAGE SPECIFICATION

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      I11-20 (UP) - I11-12 (GND) L - W-B Power window up operation Engine switch on (IG), multiplex network master switch off β†’ up 11 to 14 V β†’ Below 1 V
      I11-20 (UP) - I11-12 (GND) L - W-B Power window up operation Engine switch on (IG), door glass fully open β†’ power window auto up operation β†’ door glass fully closed 11 to 14 V β†’ Below 1 V β†’ 11 to 14 V
      I11-15 (DOWN) - I11-12 (GND) B - W-B Power window down operation Engine switch on (IG), multiplex network master switch off β†’ down 11 to 14 V β†’ Below 1 V
      I11-15 (DOWN) - I11-12 (GND) B - W-B Power window down operation Engine switch ON (IG), door glass fully closed β†’ power window auto down operation β†’ door glass fully open 11 to 14 V β†’ Below 1 V β†’ 11 to 14 V

      If the result is not as specified, the master switch may be malfunctioning.

  6. CHECK POWER WINDOW REGULATOR SWITCHΒ 
    Fig 6: Identifying I3 Connector Terminal
    G05767408Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the I3 switch connector.
    2. Measure the resistance according to the value(s) in the table below.
      RESISTANCE REFERENCE

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      I3-5 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ξ©

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Reconnect the I3 switch connector.
    4. Measure the voltage according to the value(s) in the table below.
      VOLTAGE SPECIFICATION

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      I3-2 (UP) - I3-5 (GND) L - W-B Power window up operation Engine switch on (IG), power window regulator switch off β†’ up 11 to 14 V β†’ Below 1 V
      I3-10 (DOWN) - I3-5 (GND) B - W-B Power window down operation Engine switch on (IG), power window regulator switch off β†’ down 11 to 14 V β†’ Below 1 V
      I3-4 (AUTO) - I3-5 (GND) R - W-B Power window up operation Engine switch on (IG), and door glass fully open β†’ power window auto up operation β†’ door glass fully closed 11 to 14 V β†’ Below 1 V β†’ 11 to 14 V
      I3-4 (AUTO) - I3-5 (GND) R - W-B Power window down operation Engine switch on (IG), door glass fully closed β†’ power window auto down operation β†’ door glass fully open 11 to 14 V β†’ Below 1 V β†’ 11 to 14 V

      If the result is not as specified, the switch may be malfunctioning.

  7. CHECK REAR POWER WINDOW REGULATOR SWITCH LHΒ 
    Fig 7: Identifying J10 Connector Terminal
    G05767409Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the J10 switch connector.
    2. Measure the resistance according to the value(s) in the table below.
      RESISTANCE REFERENCE

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      J10-5 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ξ©

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Reconnect the J10 switch connector.
    4. Measure the voltage according to the value(s) in the table below.
      VOLTAGE SPECIFICATION

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      J10-2 (UP) - J10-5 (GND) L - W-B Power window up operation Engine switch on (IG), power window regulator switch off β†’ up 11 to 14 V β†’ Below 1 V
      J10-10 (DOWN) - J10-5 (GND) B - W-B Power window down operation Engine switch on (IG), power window regulator switch off β†’ down 11 to 14 V β†’ Below 1 V
      J10-4 (AUTO) - J10-5 (GND) R - W-B Power window up operation Engine switch on (IG), door glass fully open β†’ power window auto up operation β†’ door glass fully closed 11 to 14 V β†’ Below 1 V β†’ 11 to 14 V
      J10-4 (AUTO) - J10-5 (GND) R - W-B Power window down operation Engine switch on (IG), door glass fully closed β†’ power window auto down operation β†’ door glass fully open 11 to 14 V β†’ Below 1 V β†’ 11 to 14 V

      If the result is not as specified, the switch may be malfunctioning.

  8. CHECK REAR POWER WINDOW REGULATOR SWITCH RHΒ 
    Fig 8: Identifying J3 Connector Terminal
    G05767410Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the J3 switch connector.
    2. Measure the resistance according to the value(s) in the table below.
      RESISTANCE REFERENCE

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      J3-5 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ξ©

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Reconnect the J3 switch connector.
    4. Measure the voltage according to the value(s) in the table below.
      VOLTAGE SPECIFICATION

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      J3-2 (UP) - J3-5 (GND) L - W-B Power window up operation Engine switch on (IG), power window regulator switch off β†’ up 11 to 14 V β†’ Below 1 V
      J3-10 (DOWN) - J3-5 (GND) B - W-B Power window down operation Engine switch on (IG), power window regulator switch off β†’ down 11 to 14 V β†’ Below 1 V
      J3-4 (AUTO) - J3-5 (GND) R - W-B Power window up operation Engine switch on (IG), door glass fully open β†’ power window auto up operation β†’ door glass fully closed 11 to 14 V β†’ Below 1 V β†’ 11 to 14 V
      J3-4 (AUTO) - J3-5 (GND) R - W-B Power window down operation Engine switch on (IG), door glass fully closed β†’ power window auto down operation β†’ door glass fully open 11 to 14 V β†’ Below 1 V β†’ 11 to 14 V

      If the result is not as specified, the switch may be malfunctioning.

  9. CHECK MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)Β 
    Fig 9: Main Body ECU Connector Chart
    G05636294Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the 2A, 2C, E1, E2 and E3 ECU connectors.
    2. Measure the resistance and voltage according to value(s) in the table below.
      RESISTANCE AND VOLTAGE SPECIFICATION

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      E3-1 (GND3) - 2D-62 (GND2) BR - W-B Ground Always Below 1 Ξ©
      2D-62 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ξ©
      2A-1 (IG) - Body ground B - Body ground IG power supply Always 11 to 14 V
      E2-1 (AM2) - Body ground W - Body ground Battery power supply Always 11 to 14 V
      E1-6 (AM1) - Body ground W - Body ground Battery power supply Always 11 to 14 V
      E1-24 (DCTY) - Body ground L - Body ground Driver side door courtesy light switch input Driver side door open Below 1 Ξ©
      Driver side door closed 10 kΞ© or higher
      E2-21 (PCTY) - Body ground Y - Body ground Front passenger side door courtesy light switch input Front passenger side door open Below 1 Ξ©
      Front passenger side door closed 10 kΞ© or higher
      E2-7 (RCTY) - Body ground G - Body ground Rear RH side door courtesy light switch input Rear RH side door open Below 1 Ξ©
      Rear RH side door closed 10 kΞ© or higher
      2C-2 (LCTY) - Body ground W - Body ground Rear LH side door courtesy light switch input Rear LH side door open Below 1 Ξ©
      Rear LH side door closed 10 kΞ© or higher

      If the result is not as specified, the wire harness side may have a malfunction

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