Terminals Of Ecu [12/2019 - 10/2022]

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
   H62-6 (IG+) - H62-17 (GND)	IG power supply	Ignition switch ON	11 to 14 V
   H62-5 (B) - H62-17 (GND)	Auxiliary battery power supply	Ignition switch off*1 Always*2	11 to 14 V
   H62-17 (GND) - Body ground	Ground	Always	Below 1 Ω

   1. *1: for HV Model
   2. *2: for Gasoline Model
3. Reconnect the H62 air conditioning amplifier assembly connector.
4. Measure the voltage and check for pulses generation according to the value(s) in the table below.

   Terminal No. (Symbol)	Terminal Description	Condition	Specified Condition
   H64-12 (SM1R) - H62-17 (GND)	Front seat heater control signal	Ignition switch ON Front seat heater switch (air conditioning control assembly) on (LO) (heater position)	Below 1 V
   H64-13 (SM1L) - H62-17 (GND)	Front seat heater control signal	Ignition switch ON Front seat heater switch (air conditioning control assembly) on (LO) (heater position)	Below 1 V
   H64-23 (SM2R) - H62-17 (GND)	Rear seat heater control signal	Ignition switch ON Rear seat heater switch (Air conditioning control assembly No. 2) (RH) on	Below 1 V
   H64-24 (SM2L) - H62-17 (GND)	Rear seat heater control signal	Ignition switch ON Rear seat heater switch (Air conditioning control assembly No. 2) (LH) on	Below 1 V
   H62-7 (LIN1) - Body ground	Seat heater switch signal	Ignition switch ON	Pulse generation

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the H27 front seat heater switch (air conditioning control 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
   H27-4 (IG+) - H27-8 (E)*1	IG power supply	Ignition switch off	Below 1 V
   H27-6 (IG+) - H27-10 (GND)*2
   H27-4 (IG+) - H27-8 (E)*1	IG power supply	Ignition switch ON	11 to 14 V
   H27-6 (IG+) - H27-10 (GND)*2
   H27-8 (E) - Body ground*1	Ground	Always	Below 1 Ω
   H27-10 (GND) - Body ground*2

   1. *1: for 12.3 Inch Display
   2. *2: for 8 Inch Display
3. Reconnect the H27 front seat heater switch (air conditioning control assembly) connector.
4. Check for pulses according to the value(s) in the table below.

   Terminal No. (Symbol)	Terminal Description	Condition	Specified Condition
   H27-3 (LIN1) - H27-8 (E)*1	Front seat heater switch signal	Ignition switch ON	Pulse generation
   H27-8 (LIN1) - H27-10 (GND)*2

   1. *1: for 12.3 Inch Display
   2. *2: for 8 Inch Display

for HV Model: Refer to TERMINALS OF ECU [12/2019 - 10/2021] , or refer to TERMINALS OF ECU [10/2021 - 10/2022]

for Gasoline Model with Automatic Air Conditioning System: Refer to TERMINALS OF ECU [12/2019 - 10/2022]

for Gasoline Model with Manual Air Conditioning System: Refer to TERMINALS OF ECU [12/2019 - 10/2022]