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Terminals Of Ecu

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  1. CHECK COMBINATION METER ASSEMBLY 
    1. Disconnect the E19 meter connector.
      Fig 1: Identifying E19 Combination Meter Assembly ECU Terminals
      G04490525Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage and resistance of the wire harness side connector.
      COMBINATION METER - ECU TERMINALS VOLTAGE AND RESISTANCE SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      B (E19-22) - Body ground R - Body Ground Power supply Always 10 to 14 V
      IG+ (E19-21) - Body ground B - Body Ground Power supply Ignition switch OFF Below 1 V
      Ignition switch ON 10 to 14 V
      PBLT (E19-1) - Body ground LG - Body Ground Passenger seat belt signal Sit on passenger seat, seat belt is fastened Below 1 Ω
      Sit on passenger seat, seat belt is unfastened 10 kΩ or higher
      ET (E19-33) - Body ground W-B - Body Ground Ground Always Below 1 Ω

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

  2. CHECK HEATER CONTROL PANEL (for Automatic Air Conditioning System) 
    1. Disconnect the E23 panel connector.
      Fig 2: Identifying Heater Control Panel E23 Connector
      G04490526Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage and resistance of the wire harness side connector.
      HEATER CONTROL PANEL E23 CONNECTOR VOLTAGE AND RESISTANCE SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      +B (E23-1) - Body ground R - Body Ground Power supply Always 10 to 14 V
      IG+ (E23-2) - Body ground L - Body Ground Power supply Ignition switch OFF Below 1 V
      Ignition switch ON 10 to 14 V
      PBEW (E23-4) - Body ground LG - Body Ground Passenger seat belt signal Sit on passenger seat, seat belt is fastened Below 1 Ω
      Sit on passenger seat, seat belt is unfastened 10 kΩ or higher
      GND (E23-7) - Body ground W-B - Body Ground Ground Always Below 1 Ω

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

  3. CHECK CLOCK ASSEMBLY (for Manual Air Conditioning System) 
    1. Disconnect the E22 clock connector.
      Fig 3: Identifying Clock Assembly E22Connector
      G04490527Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage and resistance of the wire harness side connector.
      CLOCK ASSEMBLY E22 CONNECTOR VOLTAGE AND RESISTANCE SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      +B (E22-1) - Body ground R - Body ground Power supply Always 10 to 14 V
      IG+ (E22-2) - Body ground L - Body ground Power supply Ignition switch OFF Below 1 V
      Ignition switch ON 10 to 14 V
      PBEW (E22-3) - Body ground LG - Body ground Passenger seat belt signal Sit on passenger seat, seat belt is fastened Below 1 Ω
      Sit on passenger seat, seat belt is unfastened 10 kΩ or higher
      GND (E22-5) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

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