2008 Toyota Land CruiserFACTORY OEM SERVICE PROCEDURE

Terminals Of Ecu

  1. CHECK FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LHΒ 
    Fig 1: Identifying I12 Motor Connector Terminal
    G05636286Courtesy 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 CHART

      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 CHART

      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 14 Motor Connector Terminal
    G05636287Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the 14 motor connector.
    2. Measure the resistance and voltage according to the value(s) in the table below.
      RESISTANCE AND VOLTAGE CHART

      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 14 motor connector.
    4. Measure the voltage according to the value(s) in the table below.
      VOLTAGE CHART

      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 Motor 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 CHART

      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 CHART

      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 Motor 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 CHART

      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 CHART

      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 Master Switch 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 CHART

      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 CHART

      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 14V 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 Switch Connector Terminal
    G05636291Courtesy 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 AND VOLTAGE CHART

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      I3-1 (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 I3 switch connector.
    4. Measure the voltage according to the value(s) in the table below.
      VOLTAGE CHART

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      I3-6 (UP) - I3-1 (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
      I3-7 (DOWN) - I3-1 (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
      I3-8 (AUTO) - I3-1 (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
      I3-8 (AUTO) - I3-1 (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 switch connector Terminal
    G05636292Courtesy 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 CHART

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      J10-1 (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 J10 switch connector.
    4. Measure the voltage according to the value(s) in the table below.
      VOLTAGE CHART

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      J10-6 (UP) - J10-1 (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
      J10-7 (DOWN) - J10-1 (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
      J10-8 (AUTO) - J10-1 (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
      J10-8 (AUTO) - J10-1 (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 Switch Connector Terminal
    G05636293Courtesy 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 CHART

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      J3-1 (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 J3 switch connector.
    4. Measure the voltage according to the value(s) in the table below.
      VOLTAGE CHART

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      J3-6 (UP) - J3-1 (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
      J3-7 (DOWN) - J3-1 (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
      J3-8 (AUTO) - J3-1 (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
      J3-8 (AUTO) - J3-1 (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 1V 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: Identifying Main Body ECU Connector Terminal
    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 CHART

      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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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
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  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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