Terminals Of Ecu [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. 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)	RH side front seat heater drive signal	Ignition switch ON Front seat heater switch RH (air conditioning control assembly) on	Below 1 V
   H64-13 (SM1L) - H62-17 (GND)	LH side front seat heater drive signal	Ignition switch ON Front seat heater switch LH (air conditioning control assembly) on	Below 1 V
   H64-23 (SM2R) - H62-17 (GND)*	RH side rear seat heater drive signal	Ignition switch ON Rear seat heater switch RH (No. 2 air conditioning control assembly) on	Below 1 V
   H64-24 (SM2L) - H62-17 (GND)*	LH side rear seat heater drive signal	Ignition switch ON Rear seat heater switch LH (No. 2 air conditioning control assembly) on	Below 1 V
   H62-7 (LIN1) - Body ground	LIN communication line	Ignition switch ON	Pulse generation
   H64-20 (RLIN) - Body ground*	LIN communication line	Ignition switch ON	Pulse generation

   1. *: w/ Rear Seat Heater

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

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

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

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