Terminals Of Ecu [10/2020 - 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 [10/2020 - 11/2021] , or refer to REMOVAL [11/2021 - 10/2022]

2. Connect the instrument panel junction block assembly connectors.

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

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

   Refer to INSTALLATION [10/2017 - 10/2023]

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

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   G12-12 (HRY2) - Body ground	V - Body ground	Headlight ECU sub-assembly LH power supply	Power switch on (IG)	Below 1.5 V
   			Power switch off	6 to 14 V
   5F-19 (HRLY) - Body ground	B - Body ground	Headlight ECU sub-assembly RH power supply	Power switch on (IG)	Below 1.5 V
   			Power switch off	6 to 14 V
   G12-23 (CLTB) - G12-25 (CLTE)	V - G	Automatic light control sensor power supply output	Power switch on (IG)	11 to 14 V
   G12-24 (CLTS) - Body ground	GR - Body ground	Automatic light control sensor signal input	Power switch off	Below 1 V
   			Power switch on (IG), material which blocks light used to cover and then uncover top of automatic light control sensor	Pulse generation (See waveform 1)
   G12-16 (HEAD) - Body ground	SB - Body ground	Light control switch in HEAD position signal input	Light control switch in HEAD position	Below 1 V
   			Light control switch not in HEAD position	11 to 14 V
   G17-2 (OHIL) - Body ground	LG - Body ground	Door outside handle sub-assembly (outside handle lights) signal output	Door outside handle sub-assembly (outside handle lights) off	Below 1 V
   			Door outside handle sub-assembly (outside handle lights) on	11 to 14 V

5. Waveform 1

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Item	Content
   Terminal No. (Symbol)	G12-24 (CLTS) - Body ground
   Tool Setting	2 V/DIV., 10 ms./DIV.
   Condition	Power switch on (IG), material which blocks light used to cover and then uncover top of automatic light control sensor

   HINT: 

   The communication waveform changes according to the surrounding brightness.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the A31 headlight ECU sub-assembly LH connector.
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
   A31-4 (IG) - Body ground	LA-R - Body ground	Ignition power supply	Power switch off	Below 1 V
   			Power switch on (IG)	11 to 14 V
   A31-13 (ECUB) - Body ground	G - Body ground	Power supply	Approximately 15 seconds elapsed after turning the power switch off	Below 1 V
   			Power switch on (IG) or within approximately 15 seconds of power switch being turned off	9.5 to 14 V
   A31-12 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

3. Reconnect the A31 headlight ECU sub-assembly LH connector.

   HINT: 

   • Since the A31 headlight ECU sub-assembly LH connector is a waterproof type connector, the voltage and pulses cannot be checked directly. The values listed are for reference only.
   • Since the B and C headlight ECU sub-assembly RH connectors are connected inside the headlight assembly, the voltage and pulses cannot be checked directly. The values listed are for reference only.
4. Measure the voltage and check of pulses according to the value(s) in the table below.

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   A31-19 (LINS) - Body ground	GR - Body ground	LIN communication line	Power switch off	Below 1 V
   			Power switch on (IG)	Pulse generation
   A31-20 (LINL) - Body ground	B - Body ground	LIN communication line	Power switch off	Below 1 V
   			Power switch on (IG)	Pulse generation
   B-10 - B-1	-	Daytime running lights/parking lights power source	Daytime running lights and parking lights off	Below 1 V
   			Daytime running lights and parking lights on	11 to 14 V
   B-16 - B-1	-	Daytime running lights/parking lights control signal output	Daytime running lights and parking lights off	Below 1 V
   			Daytime running lights and parking lights on	Pulse generation
   B-2 - B-3	-	Low beam headlights/high beam headlights drive output	Low beam headlights and high beam headlights off	Below 1 V
   			Low beam headlights or high beam headlights on	24.2 to 35.4 V
   B-4 - B-14	-	Low beam fan power source	Low beam headlights off	Below 1 V
   			Low beam headlights on	4.75 to 5.25 V
   B-15 - B-14	-	Low beam fan control signal input	Low beam headlights off	Below 1 V
   			Low beam headlights on	Pulse generation
   B-6 - B-5	-	Cornering light drive output	Cornering light off	Below 1 V
   			Cornering light on	Pulse generation
   B-9 - B-17	-	Headlight leveling motor power source	Power switch off	Below 1 V
   			Power switch on (IG)	11 to 14 V
   B-18 - B-12	-	Front side marker light drive output	Front side marker light off	Below 1 V
   			Front side marker light on	11 to 14 V
   B-19 - B-11	-	High beam headlights drive output	High beam headlights off	Below 1 V
   			High beam headlights on	11 to 14 V
   B-20 - B-13	-	Front turn signal light signal output	Power switch on (IG), front turn signal light off	Below 1 V
   			Power switch on (IG), front turn signal light blinking	11 to 14 V ←→ Below 1 V
   C-4 - Body ground	-	LIN communication line	Power switch off	Below 1 V
   			Power switch on (IG)	Pulse generation
   C-13 - Body ground	-	LIN communication line	Power switch off	Below 1 V
   			Power switch on (IG)	Pulse generation

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the A32 headlight ECU sub-assembly RH connector.
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
   A32-4 (IG) - Body ground	LA-R - Body ground	Ignition power supply	Power switch off	Below 1 V
   			Power switch on (IG)	11 to 14 V
   A32-13 (ECUB) - Body ground	R - Body ground	Power supply	Approximately 15 seconds elapsed after turning the power switch off	Below 1 V
   			Power switch on (IG) or within approximately 15 seconds of power switch being turned off	9.5 to 14 V
   A32-12 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

3. Reconnect the A32 headlight ECU sub-assembly RH connector.

   HINT: 

   • Since the A32 headlight ECU sub-assembly RH connector is a waterproof type connector, the voltage and pulses cannot be checked directly. The values listed are for reference only.
   • Since the B and C headlight ECU sub-assembly RH connectors are connected inside the headlight assembly, the voltage and pulses cannot be checked directly. The values listed are for reference only.
4. Measure the voltage and check of pulses according to the value(s) in the table below.

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   A32-19 (LINS) - Body ground	GR - Body ground	LIN communication line	Power switch off	Below 1 V
   			Power switch on (IG)	Pulse generation
   A32-20 (LINL) - Body ground	B - Body ground	LIN communication line	Power switch off	Below 1 V
   			Power switch on (IG)	Pulse generation
   B-10 - B-1	-	Daytime running lights/parking lights power source	Daytime running lights and parking lights off	Below 1 V
   			Daytime running lights and parking lights on	11 to 14 V
   B-16 - B-1	-	Daytime running lights/parking lights control signal output	Daytime running lights and parking lights off	Below 1 V
   			Daytime running lights and parking lights on	Pulse generation
   B-2 - B-3	-	Low beam headlights/high beam headlights drive output	Low beam headlights and high beam headlights off	Below 1 V
   			Low beam headlights or high beam headlights on	24.2 to 35.4 V
   B-4 - B-14	-	Low beam fan power source	Low beam headlights off	Below 1 V
   			Low beam headlights on	4.75 to 5.25 V
   B-15 - B-14	-	Low beam fan control signal input	Low beam headlights off	Below 1 V
   			Low beam headlights on	Pulse generation
   B-6 - B-5	-	Cornering light drive output	Cornering light off	Below 1 V
   			Cornering light on	Pulse generation
   B-9 - B-17	-	Headlight leveling motor power source	Power switch off	Below 1 V
   			Power switch on (IG)	11 to 14 V
   B-19 - B-11	-	High beam headlights drive output	High beam headlights off	Below 1 V
   			High beam headlights on	11 to 14 V
   B-20 - B-13	-	Front turn signal light signal output	Power switch on (IG), front turn signal light off	Below 1 V
   			Power switch on (IG), front turn signal light blinking	11 to 14 V ←→ Below 1 V
   C-4 - Body ground	-	LIN communication line	Power switch off	Below 1 V
   			Power switch on (IG)	Pulse generation
   C-13 - Body ground	-	LIN communication line	Power switch off	Below 1 V
   			Power switch on (IG)	Pulse generation

Refer to TERMINALS OF ECU [10/2020 - 11/2021] , or refer to TERMINALS OF ECU [11/2021 - 10/2023]

Refer to TERMINALS OF ECU [10/2020 - 10/2022]

Refer to TERMINALS OF ECU [10/2020 - 10/2022]

Refer to TERMINALS OF ECU [10/2020 - 10/2023]

Refer to TERMINALS OF ECU [10/2020 - 10/2023]