Terminals Of Ecu [11/2023 - ]

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.

   Refer to REMOVAL [11/2023 - ]

2. Reconnect the power distribution box assembly connectors.
3. Measure the resistance and voltage according to the value(s) in the table below.

   Terminal No. (Symbol)	Terminal Description	Condition	Specified Condition
   MB-26 (BECU) - Body ground	Auxiliary battery power supply	Ignition switch off	11 to 14 V
   MB-27 (IGR) - Body ground	Ignition power supply (IG signal)	Ignition switch off	Below 1 V
   		Ignition switch ON	11 to 14 V
   MB-13 (GND1) - Body ground	Ground	Always	Below 1 Ω
   MB-14 (GND2) - Body ground	Ground	Always	Below 1 Ω
   MB-2 (FLCY) - Body ground	Front door courtesy light switch LH input	Front door LH closed	10 kΩ or higher
   		Front door LH open	Below 1 Ω
   MB-4 (FRCY) - Body ground	Front door courtesy light switch RH input	Front door RH closed	10 kΩ or higher
   		Front door RH open	Below 1 Ω
   MB-6 (LCTY) - Body ground	Rear door courtesy light switch LH input	Rear door LH closed	10 kΩ or higher
   		Rear door LH open	Below 1 Ω
   MB-1 (RCTY) - Body ground	Rear door courtesy light switch RH input	Rear door RH closed	10 kΩ or higher
   		Rear door RH open	Below 1 Ω
   MB-19 (BCTY) - Body ground	Back door courtesy light switch signal	Back door closed (OFF)	10 kΩ or higher
   		Back door open (ON)	Below 1 Ω
   H135-27 (HCTY) - Body ground	Engine hood courtesy switch input	Engine hood open	10 kΩ or higher
   		Engine hood closed	Below 1 Ω

4. Install the main body ECU (multiplex network body ECU) to power distribution box assembly.

   Refer to INSTALLATION [11/2023 - ]

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

   Terminal No. (Symbol)	Terminal Description	Condition	Specified Condition
   H135-9 (LSFL) - Body ground	Front door LH unlock detection switch input	Front door LH unlocked → locked	Below 1 V → 11 to 14 V or pulse output (maximum 14 V)*
   H135-3 (LSFR) - Body ground	Front door RH unlock detection switch input	Front door RH unlocked → locked	Below 1 V → 11 to 14 V or pulse output (maximum 14 V)*
   H135-10 (LSWL) - Body ground	Rear door LH unlock detection switch input	Rear door LH unlocked → locked	Below 1 V → 11 to 14 V or pulse output (maximum 14 V)*
   H136-23 (LSWR) - Body ground	Rear door RH unlock detection switch input	Rear door RH unlocked → locked	Below 1 V → 11 to 14 V or pulse output (maximum 14 V)*
   8E-4 (SH) - Body ground	Security horn assembly drive	Security horn assembly sounding (Theft deterrent system in alarm sounding state)	Pulse generation (Below 1 V ← → 11 to 14 V)
   8E-11 (HORN) - Body ground	Vehicle horns drive	Vehicle horns sounding (Theft deterrent system in alarm sounding state)	Pulse generation (Below 1 V ← → 11 to 14 V)

   1. *: Differs depending on the vehicle model

Refer to TERMINALS OF ECU [11/2023 - ]