Terminals Of Ecu [02/2019 - 06/2020]

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
   1. Refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020]
2. Connect the instrument panel junction block assembly connectors.
3. Measure the voltage and resistance 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	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

4. Install the main body ECU (multiplex network body ECU).
   1. Refer to INSTALLATION [11/2018 - 08/2020]
5. Measure the voltage and resistance, and check for pulses according to the value(s) in the table below.

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   4A-52 (FFGO) - Body ground	G - Body ground	FOG FR relay drive output	Taillights on, fog light switch in Fr position	Below 1 V
   			Taillights on, fog light switch in off position	11 to 14 V
   4F-19 - Body ground	LA-BE - Body ground	BKUP LP relay drive output	Power switch off, shift lever not in R	Below 1 V
   			Power switch on (IG), shift lever in R	11 to 14 V
   4F-31 (HRLY) - Body ground	V - Body ground	H-LP LH relay drive output	15 seconds or more after power switch turned off Taillights off	11 to 14 V
   			Power switch on (IG) or within 15 seconds after power switch turned off Taillights on	Below 1 V
   4H-30 (TRLY) - Body ground	LA-R - Body ground	Taillights and license plate lights drive output	Light control switch in TAIL or HEAD position	11 to 14 V
   			Light control switch DRL OFF	Below 1 V
   G43-19 (GND2) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
   G45-21 (AHID) - Body ground	R - Body ground	Auto high beam switch indicator drive output	Power switch on (IG), auto high beam switch on	Below 1 V
   			Power switch on (IG), auto high beam switch off	11 to 14 V
   G44-12 (HRY2) - Body ground	BE - Body ground	H-LP RH relay drive output	15 seconds or more after power switch turned off Taillights off	11 to 14 V
   			Power switch on (IG) or within 15 seconds after power switch turned off Taillights on	Below 1 V
   G44-16 (HEAD) - Body ground	LG - Body ground	Light control switch HEAD position input	Light control switch in HEAD position	Below 1 V
   			Light control switch not in HEAD position	11 to 14 V
   G44-23 (CLTB) - G44-25 (CLTE)	BE - GR	Automatic light control sensor power supply output	Power switch on (IG)	11 to 14 V
   G44-24 (CLTS) - Body ground	R - Body ground	Automatic light control sensor signal input	Power switch off	Below 1 V
   			Power switch on (IG)	Pulse generation (See waveform 1)
   G44-25 (CLTE) - Body ground	GR - Body ground	Automatic light control sensor ground	Power switch on (IG)	Below 1 Ω
   G44-26 (AHBI) - Body ground	G - Body ground	Auto high beam switch signal input	Auto high beam switch on	Below 1 V
   			Auto high beam switch off	11 to 14 V
   G45-2 (MILE) - Body ground	L - Body ground	Outside mirror foot lights drive output	Outside mirror foot light illuminates	11 to 14 V
   			Outside mirror foot light off	Below 3 V

   1. Waveform 1
      Fig 1: Waveform 1

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Item	Content
      Tester Connection	G44-24 (CLTS) - Body ground
      Tool setting	2 V/DIV., 10 ms./DIV.
      Condition	Power switch on (IG)

      HINT: 

      The communication waveform changes according to the surrounding brightness.

Fig 2: Headlight ECU Sub-Assembly RH Connector End View

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the A11 headlight ECU sub-assembly LH connector.
2. Measure the voltage and resistance according to the value(s) in the table below.

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   A11-4 (IG) - Body ground	B - Body ground	Ignition power supply	Power switch off	Below 1 V
   			Power switch on (IG)	11 to 14 V
   A11-12 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
   A11-13 (ECUB) - Body ground	B - Body ground	Auxiliary battery power supply	15 seconds or more after power switch turned off Taillights off	Below 1 V
   			Power switch on (IG) or within 15 seconds after power switch turned off Taillights on	11 to 14 V

3. Connect the A11 headlight ECU sub-assembly LH connector.

   HINT: 

   • Since the A11 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 headlight ECU sub-assembly LH 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 resistance, and check of pulses according to the value(s) in the table below.

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   A11-11 (TNS) - Body ground	LA-LG - Body ground	Front turn signal light LH signal input	Power switch on (IG), front turn signal light LH off	Below 1 V
   			Power switch on (IG), front turn signal light LH blinking	11 to 14 V ←→ Below 1 V
   A11-16 (SBR) - A11-15 (SGR)	LG - R	Rear height control sensor sub-assembly LH power supply	Power switch on (IG)	4.75 to 5.25 V
   A11-17 (SHRL) - A11-15 (SGR)	GR - R	Rear height control sensor sub-assembly LH signal input	Power switch on (IG), vehicle unloaded, vehicle stopped	Approximately 2.5 V (value decreases as the front of the vehicle is raised)
   A11-15 (SGR) - Body ground	R - Body ground	Rear height control sensor sub-assembly LH ground	Power switch on (IG)	Below 1 Ω
   A11-19 (LINS) - Body ground	L - Body ground	LIN communication line	Power switch off	Below 1 V
   			Power switch on (IG)	Pulse generation
   A11-20 (LINL) - Body ground	R - Body ground	LIN communication line	Power switch off	Below 1 V
   			Power switch on (IG)	Pulse generation
   A11-23 (CANL) - Body ground	W - Body ground	CAN communication line	Power switch off	Below 1 V
   			Power switch on (IG)	Pulse generation
   A11-24 (CANH) - Body ground	P - Body ground	CAN communication line	Power switch off	Below 1 V
   			Power switch on (IG)	Pulse generation
   B-2 (LOLED2) - B-3 (LOLED1)	-	Low beam headlight LH drive output	Low beam headlight LH off	Below 1 V
   			Low beam headlight LH on	10.7 to 14.8 V
   B-3 (LOLED1) - Body ground	-	Low beam headlight LH drive ground	Low beam headlight LH on	Below 1 Ω
   B-4 (FANB) - B-14 (FANG)	-	Headlight fan LH power source	Low beam headlight LH off	Below 1 V
   			Low beam headlight LH on	4.5 to 5.5 V
   B-14 (FANG) - Body ground	-	Headlight fan LH ground	Low beam headlight LH on	Below 1 Ω
   B-9 (ACTBI) - B-17 (ACTGI)	-	Headlight swivel and leveling motor LH power source	Power switch off	Below 1 V
   			Power switch on (IG)	11 to 14 V
   B-17 (ACTGI) - Body ground	-	Headlight swivel and leveling motor LH ground	Power switch on (IG)	Below 1 Ω
   B-20 (TURN+) - B-13 (TURN-)	-	Front turn signal light LH signal output	Power switch on (IG), front turn signal light LH off	Below 1 V
   			Power switch on (IG), front turn signal light LH blinking	11 to 14 V ←→ Below 1 V
   B-13 (TURN-) - Body ground	-	Front turn signal light LH ground	Power switch on (IG), front turn signal light LH blinking	Below 1 Ω
   B-10 (DRL/CLL+) - B-1 (DRL/CLL-)	-	Parking light/daytime running light LH power source	Parking light and daytime running light LH off	Below 1 V
   			Parking light and daytime running light LH on	11 to 14 V
   B-1 (DRL/CLL-) - Body ground	-	Parking light/daytime running light LH ground	Parking light and daytime running light LH on	Below 1 Ω
   B-15 (FANP) - B-14 (FANG)	-	Headlight fan LH control signal input	Low beam headlight LH off	Below 1 V
   			Low beam headlight LH on	Pulse generation
   C-7 (CLL+) - B-1 (DRL/CLL-)	-	Parking light/daytime running light LH control signal output	Parking light and daytime running light LH off	Below 1 V
   			Parking light and daytime running light LH on	11 to 14 V
   B-18 (FSML+) - B-12 (FSML-)	-	Front side marker light LH drive output	Front side marker light LH off	Below 1 V
   			Front side marker light LH on	11 to 14 V
   B-12 (FSML-) - Body ground	-	Front side marker light LH ground	Front side marker light LH on	Below 1 Ω
   B-19 (HI SOL+) - B-11 (HI SOL-)	-	High beam headlight LH drive output	High beam headlight LH off	Below 1 V
   			High beam headlight LH on	11 to 14 V
   B-11 (HI SOL-) - Body ground	-	High beam headlight LH ground	High beam headlight LH on	Below 1 Ω
   C-4 (LINSI) - Body ground	-	LIN communication line	Power switch off	Below 1 V
   			Power switch on (IG)	Pulse generation
   C-13 (LINLI) - Body ground	-	LIN communication line	Power switch off	Below 1 V
   			Power switch on (IG)	Pulse generation

Fig 3: Identifying No. 1 Headlight ECU Sub-Assembly RH Connectors Terminal Identification

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the A12 headlight ECU sub-assembly RH connector.
2. Measure the voltage and resistance according to the value(s) in the table below.

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   A12-4 (IG) - Body ground	B - Body ground	Ignition power supply	Power switch off	Below 1 V
   			Power switch on (IG)	11 to 14 V
   A12-12 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
   A12-13 (ECUB) - Body ground	BE - Body ground	Auxiliary battery power supply	15 seconds or more after power switch turned off Taillights off	Below 1 V
   			Power switch on (IG) or within 15 seconds after power switch turned off Taillights on	11 to 14 V

3. Connect the A12 headlight ECU sub-assembly RH connector.

   HINT: 

   • Since the A12 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 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 resistance, and check of pulses according to the value(s) in the table below.

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   A12-11 (TNS) - Body ground	LA-G - Body ground	Front turn signal light RH signal input	Power switch on (IG), front turn signal light RH off	Below 1 V
   			Power switch on (IG), front turn signal light RH blinking	11 to 14 V ←→ Below 1 V
   A12-19 (LINS) - Body ground	L - Body ground	LIN communication line	Power switch off	Below 1 V
   			Power switch on (IG)	Pulse generation
   A12-20 (LINL) - Body ground	R - Body ground	LIN communication line	Power switch off	Below 1 V
   			Power switch on (IG)	Pulse generation
   A12-23 (CANL) - Body ground	W - Body ground	CAN communication line	Power switch off	Below 1 V
   			Power switch on (IG)	Pulse generation
   A12-24 (CANH) - Body ground	L - Body ground	CAN communication line	Power switch off	Below 1 V
   			Power switch on (IG)	Pulse generation
   B-2 (LOLED2) - B-3 (LOLED1)	-	Low beam headlight RH drive output	Low beam headlight RH off	Below 1 V
   			Low beam headlight RH on	10.7 to 14.8 V
   B-3 (LOLED1) - Body ground	-	Low beam headlight RH ground	Low beam headlight RH on	Below 1 Ω
   B-4 (FANB) - B-14 (FANG)	-	Headlight fan RH power source	Low beam headlight RH off	Below 1 V
   			Low beam headlight RH on	4.5 to 5.5 V
   B-14 (FANG) - Body ground	-	Headlight fan RH ground	Low beam headlight RH on	Below 1 Ω
   B-9 (ACTBI) - B-17 (ACTGI)	-	Headlight swivel and leveling motor RH power source	Power switch off	Below 1 V
   			Power switch on (IG)	11 to 14 V
   B-17 (ACTGI) - Body ground	-	Headlight swivel and leveling motor RH ground	Power switch on (IG)	Below 1 Ω
   B-20 (TURN+) - B-13 (TURN-)	-	Front turn signal light RH signal output	Power switch on (IG), front turn signal light RH off	Below 1 V
   			Power switch on (IG), front turn signal light RH blinking	11 to 14 V ←→ Below 1 V
   B-13 (TURN-) - Body ground	-	Front turn signal light RH ground	Power switch on (IG), front turn signal light RH blinking	Below 1 Ω
   B-10 (DRL/CLL+) - B-1 (DRL/CLL-)	-	Parking light/daytime running light RH power source	Parking light and daytime running light RH off	Below 1 V
   			Parking light and daytime running light RH on	11 to 14 V
   B-1 (DRL/CLL-) - Body ground	-	Parking light/daytime running light RH ground	Parking light and daytime running light RH on	Below 1 Ω
   B-15 (FANP) - B-14 (FANG)	-	Headlight fan RH control signal input	Low beam headlight RH off	Below 1 V
   			Low beam headlight RH on	Pulse generation
   C-7 (CLL+) - B-1 (DRL/CLL-)	-	Parking light/daytime running light RH control signal output	Parking light and daytime running light RH off	Below 1 V
   			Parking light and daytime running light RH on	11 to 14 V
   B-18 (FSML+) - B-12 (FSML-)	-	Front side marker light RH drive output	Front side marker light RH off	Below 1 V
   			Front side marker light RH on	11 to 14 V
   B-12 (FSML-) - Body ground	-	Front side marker light RH ground	Front side marker light RH on	Below 1 Ω
   B-19 (HI SOL+) - B-11 (HI SOL-)	-	High beam headlight RH drive output	High beam headlight RH off	Below 1 V
   			High beam headlight RH on	11 to 14 V
   B-11 (HI SOL-) - Body ground	-	High beam headlight RH ground	High beam headlight RH on	Below 1 Ω
   C-4 (LINSI) - Body ground	-	LIN communication line	Power switch off	Below 1 V
   			Power switch on (IG)	Pulse generation
   C-13 (LINLI) - Body ground	-	LIN communication line	Power switch off	Below 1 V
   			Power switch on (IG)	Pulse generation

Refer to TERMINALS OF ECU [11/2018 - 08/2020]

Refer to TERMINALS OF ECU [11/2018 - 12/2021]

Refer to TERMINALS OF ECU [02/2019 - 10/2019] , or refer to TERMINALS OF ECU [10/2019 - 06/2020]

Refer to TERMINALS OF ECU [02/2019 - 06/2020]