Terminals Of Ecu [03/2017 - ]

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 [03/2017 - 06/2017] , or refer to REMOVAL [06/2017 - 10/2020] , or refer to REMOVAL [10/2020 - ]

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

   HINT: 

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

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   MB-11 (GND1) - Body ground	-	Ground	Always	Below 1 Ω
   MB-31 (BECU) - Body ground	-	Battery power supply	Always	11 to 14 V
   MB-30 (ACC) - Body ground	-	ACC power supply	Ignition switch ACC	11 to 14 V
   MB-30 (ACC) - Body ground	-	ACC power supply	Ignition switch off	Below 1 V
   MB-32 (IG) - Body ground	-	IG power supply	Ignition switch ON	11 to 14 V
   MB-32 (IG) - Body ground	-	IG power supply	Ignition switch off	Below 1 V

4. Install the main body ECU (multiplex network body ECU) to the instrument panel junction block assembly.

   Refer to INSTALLATION [03/2017 - ]

5. Measure the voltage and check for pulses according to the value(s) in the table below.

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   K53-4 (TSW) - Body ground	LG - Body ground	Luggage compartment door opening switch signal	Luggage compartment door opening switch on	Below 1 V
   			Ignition switch off, all doors closed and luggage compartment door opening switch off	Pulse generation
   3D-34 (LGCY) - Body ground	LA-GR - Body ground	Luggage compartment door courtesy light switch assembly input signal	Luggage compartment door open	Below 1 V
   			Luggage compartment door closed	11 to 14 V
   3D-20 (TR+) - Body ground	LA-G - Body ground	Luggage compartment door open relay output signal	Luggage compartment door opening switch on	11 to 14 V
   			Luggage compartment door opening switch off	Below 1 V

Refer to TERMINALS OF ECU [03/2017 - ]