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Terminals Of Ecu

  1. CHECK SEAT CLIMATE CONTROL ECU LH 
    Fig 1: Identifying f13 And f14 ECU Connector Terminals
    G04952577Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the f13 and f14 ECU connectors.
    2. Measure the voltage and resistance of the wire harness side connectors.
      VOLTAGE AND RESISTANCE SPECIFIED CONDITION

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      f13-1 (IG) - Body ground Y - Body ground Power source Engine switch on (IG) 11 to 14 V
      f13-2 (SYSB) - Body ground G - Body ground Power source Always 11 to 14 V
      f13-12 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      f13-13 (LIN) - Body ground V - Body ground LIN line Always 10 kΩ or higher

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

    3. Reconnect the f13 and f14 ECU connectors.
    4. Measure the voltage of the connectors.
      CONNECTOR TERMINALS VOLTAGE SPECIFIED CONDITION

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      f14-1 (B) - Body ground L - Body ground Power supply for seat heater Engine switch on (IG) Seat heater switch OFF Below 1 V
      Engine switch on (IG) Turn seat heater switch Max. WARM 11 to 14 V
      f14-5 (E) - Body ground Y - Body ground Ground Always Below 1 Ω
      f14-9 (H5) - Body ground BR - Body ground Seat heater temp, signal Engine switch off Below 1 V
      Engine switch on (IG) 1 to 4 V
      f14-10 (HS) - Body ground P - Body ground Seat heater temp, signal ground Always Below 1 Ω

      If the result is not as specified, the ECU may have a malfunction.

  2. CHECK SEAT CLIMATE CONTROL ECU RH 
    Fig 2: Identifying f7 And f8 ECU Connector Terminals
    G04952578Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the f7 and f8 ECU connectors.
    2. Measure the voltage and resistance of the wire harness side connectors.
      VOLTAGE AND RESISTANCE SPECIFIED CONDITION

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      f8-1 (IG) - Body ground Y - Body ground Power source Engine switch on (IG) 11 to 14 V
      f8-2 (SYSB) - Body ground G - Body ground Power source Always 11 to 14 V
      f8-11 (VER) - Body ground W-B - Body ground Ground Always Below 1 Ω
      f8-12 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      f8-13 (LIN) - Body ground V - Body ground LIN line Always 10 kΩ or higher

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

    3. Reconnect the U and f8 ECU connectors.
    4. Measure the voltage of the connectors.
      CONNECTOR TERMINALS VOLTAGE SPECIFIED CONDITION

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      f7-1 (B) - Body ground L - Body ground Power supply for seat heater Engine switch on (IG) Seat heater switch OFF Below 1 V
      Engine switch on (IG) Turn seat heater switch Max. WARM 11 to 14 V
      f7-5 (E) - Body ground Y - Body ground Ground Always Below 1 Ω
      f7-9 (H5) - Body ground BR - Body ground Seat heater temp, signal Engine switch off Below 1 V
      Engine switch on (IG) 1 to 4 V
      f7-10 (HS) - Body ground P - Body ground Seat heater temp, signal ground Always Below 1 Ω

      If the result is not as specified, the ECU may have a malfunction.

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