Terminals Of Ecu [11/2023 - ]

Fig 1: Check Air Conditioning Amplifier Assembly [11/2023 - ]

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the H62 air conditioning amplifier assembly connector.
2. Measure the voltage and resistance according to the value(s) in the table below.

   HINT: 

   Measure the values on the wire harness side with the connector disconnected.

   Terminal No. (Symbol)	Terminal Description	Condition	Specified Condition
   H62-6 (IG+) - H62-17 (GND)	IG power supply	Ignition switch off	Below 1 V
   		Ignition switch ON	11 to 14 V
   H62-5 (B) - H62-17 (GND)	Auxiliary battery power supply	Ignition switch off	11 to 14 V
   H62-17 (GND) - Body ground	Ground	Always	Below 1 Ω

3. Reconnect the H62 air conditioning amplifier assembly connector.
4. Check for pulses according to the value(s) in the table below.

   Terminal No. (Symbol)	Terminal Description	Condition	Specified Condition
   H62-14 (LOUT) - Body ground	Climate control blower control signal	Ignition switch ON Climate control switch (Air conditioning control assembly) (for LH) on (blower position)	Pulse generation (See waveform)
   H62-13 (ROUT) - Body ground	Climate control blower control signal	Ignition switch ON Climate control switch (Air conditioning control assembly) (for RH) on (blower position)	Pulse generation (See waveform)
   H62-7 (LIN1) - Body ground	LIN communication line	Ignition switch ON	Pulse generation

   1. Waveform (Reference):

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      MEASUREMENT CONDITION
      
      

      Item	Content
      Tester Connection	H62-14 (LOUT) - Body ground H62-13 (ROUT) - Body ground
      Tool Setting	1 V/DIV., 0.5 ms/DIV.
      Vehicle Condition	Ignition switch ON Climate control switch (Air conditioning control assembly) on

For HV Model: Refer to TERMINALS OF ECU [11/2023 - ]

For Gasoline Model: Refer to TERMINALS OF ECU [11/2023 - ]