Terminals Of Ecu [08/2020 - 10/2022]

Fig 1: Main Body ECU (Multiplex Network Body ECU) And Instrument Panel Junction Block Assembly (W/ Rear Seat Belt Warning System) [08/2020 - 10/2022]

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

   Refer to REMOVAL [08/2020 - 12/2021] , or refer to REMOVAL [12/2021 - 10/2022]

2. Reconnect the instrument panel junction block assembly connectors.
3. Measure the resistance and voltage according to the value(s) in the table below.

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   A-32 (IG) - Body ground	None - Body ground	Ignition power supply	Ignition switch ON	11 to 14 V
   			Ignition switch off	Below 1 V
   A-31 (BECU) - Body ground	None - Body ground	Auxiliary Battery power supply	Ignition switch off	11 to 14 V
   A-30 (ACC) - Body ground	None - Body ground	ACC power supply	Ignition switch ACC	11 to 14 V
   			Ignition switch off	Below 1 V
   A-11 (GND1) - Body ground	None - Body ground	Ground	Always	Below 1 Ω

4. Install the main body ECU (multiplex network body ECU).

   Refer to INSTALLATION [08/2020 - ]

5. Measure the voltage and pulse according to the value(s) in the table below.

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   4H-24 (LCTY) - Body ground	G - Body ground	Rear door courtesy light switch assembly LH input	Rear door LH open	Below 1 V
   			Rear door LH closed	4.7 to 5.3 V
   4A-31 (RCTY) - Body ground	LA-V - Body ground	Rear door courtesy light switch assembly RH input	Rear door RH open	Below 1 V
   			Rear door RH closed	4.7 to 5.3 V

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the G18 and G19 combination meter assembly connectors.
2. Measure the resistance and voltage according to the value(s) in the table below.

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   G18-22 (B) - Body ground	B - Body ground	Auxiliary Battery power supply	Ignition switch off	11 to 14 V
   G18-38 (IG+) - Body ground	L - Body ground	Ignition power supply (IG signal)	Ignition switch ON	11 to 14 V*1 10.5 to 16 V*2
   			Ignition switch off	Below 1 V
   G18-23 (ES) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
   G19-36 (RLSB) - Body ground*3	SB - Body ground	Rear LH seat belt buckle switch signal	Rear LH seat belt fastened	10 kΩ or higher
   			Rear LH seat belt unfastened	Below 1 Ω
   G19-19 (RCSB) - Body ground*3	B - Body ground	Rear center seat belt buckle switch signal	Rear center seat belt fastened	10 kΩ or higher
   			Rear center seat belt fastened	Below 1 Ω
   G19-35 (RRSB) - Body ground*3	LG - Body ground	Rear RH seat belt buckle switch signal	Rear RH seat belt fastened	10 kΩ or higher
   			Rear RH seat belt unfastened	Below 1 Ω

   *1: w/o Stop and Start System

   *2: w/ Stop and Start System

   *3: w/ Rear Seat Belt Warning System

Refer to TERMINALS OF ECU [08/2020 - ]

Refer to TERMINALS OF ECU [11/2018 - ]