LIGHTING (EXT): LIGHTING SYSTEM (w/ AFS): TERMINALS OF ECU; 2020 MY Camry HV [09/2019

Last Modified: 11-20-2023	6.11:8.1.0	Doc ID: RM100000001KY80
Model Year Start: 2020	Model: Camry HV	Prod Date Range: [09/2019 - 10/2020]
Title: LIGHTING (EXT): LIGHTING SYSTEM (w/ AFS): TERMINALS OF ECU; 2020 MY Camry HV [09/2019 - 10/2020]

TERMINALS OF ECU

CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

(a) Disconnect the instrument panel junction block assembly and main body ECU (multiplex network body ECU) connectors.

(b) Measure the voltage and resistance according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
3B-3 - Body ground	LA - Body ground	Ground	Always	Below 1 Ω
3C-1 - Body ground	LG - Body ground	Auxiliary battery power supply	Power switch off	11 to 14 V
3F-1 - Body ground	W - Body ground	Auxiliary battery power supply	Power switch off	11 to 14 V

(d) 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
3C-19 - Body ground	BE - Body ground	BKUP LP relay drive output	Power switch off, shift lever not in R	Below 1 V
3C-19 - Body ground	BE - Body ground	BKUP LP relay drive output	Power switch on (IG), shift lever in R	11 to 14 V
3C-31 - Body ground	V - Body ground	H-LP LH relay drive output	Power switch on (IG) or within 15 seconds after power switch turned off Light control switch in tail or head position	Below 1 V
3C-31 - Body ground	V - Body ground	H-LP LH relay drive output	15 seconds or more after power switch turned off Light control switch off	11 to 14 V
3D-10 - Body ground	LG - Body ground	Back-up lights drive output	Power switch off, shift lever not in R	Below 1 V
3D-10 - Body ground	LG - Body ground	Back-up lights drive output	Power switch on (IG), shift lever in R	11 to 14 V
3D-30 - Body ground	LA-B - Body ground	Taillights, rear side marker lights and license plate lights drive output	Light control switch in tail or head position	11 to 14 V
3D-30 - Body ground	LA-B - Body ground		Light control switch off	Below 1 V
K51-19 (GND2) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
K51-23 (AHID) - Body ground	BE - Body ground	Auto high beam switch indicator drive output	Power switch on (IG), auto high beam switch on	Below 1 V
K51-23 (AHID) - Body ground	BE - Body ground	Auto high beam switch indicator drive output	Power switch on (IG), auto high beam switch off	11 to 14 V
K52-12 (HRY2) - Body ground	BE - Body ground	H-LP RH relay drive output	Power switch on (IG) or within 15 seconds after power switch turned off Light control switch in tail or head position	Below 1 V
K52-12 (HRY2) - Body ground	BE - Body ground	H-LP RH relay drive output	15 seconds or more after power switch turned off Light control switch off	11 to 14 V
K52-16 (HEAD) - Body ground	LG - Body ground	Light control switch head position input	Light control switch in head position	Below 1 V
K52-16 (HEAD) - Body ground	LG - Body ground	Light control switch head position input	Light control switch not in head position	11 to 14 V
K52-23 (CLTB) - K52-25 (CLTE)	BE - GR	Automatic light control sensor power supply output	Power switch off	Below 1 V
K52-23 (CLTB) - K52-25 (CLTE)	BE - GR	Automatic light control sensor power supply output	Power switch on (IG)	11 to 14 V
K52-24 (CLTS) - Body ground	R - Body ground	Automatic light control sensor signal input	Power switch off	Below 1 V
K52-24 (CLTS) - Body ground	R - Body ground	Automatic light control sensor signal input	Power switch on (IG)	Pulse generation (See waveform 1)
K52-26 (AHBI) - Body ground	B - Body ground	Auto high beam switch signal input	Auto high beam switch on	Below 1 V
K52-26 (AHBI) - Body ground	B - Body ground	Auto high beam switch signal input	Auto high beam switch off	11 to 14 V

(1) Waveform 1

Item	Content
Tester Connection	K52-24 (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.

CHECK HEADLIGHT ECU SUB-ASSEMBLY LH

(a) Disconnect the A79 headlight ECU sub-assembly LH connector.

(b) Measure the voltage and resistance on the wire harness side connector according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
A79-4 (IG) - Body ground	B - Body ground	Ignition power supply	Power switch off	Below 1 V
A79-4 (IG) - Body ground	B - Body ground	Ignition power supply	Power switch on (IG)	11 to 14 V
A79-12 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
A79-13 (ECUB) - Body ground	B - Body ground	Auxiliary battery power supply	15 seconds or more after power switch turned off Light control switch off	Below 1 V
A79-13 (ECUB) - Body ground	B - Body ground	Auxiliary battery power supply	Power switch on (IG) or within 15 seconds after power switch turned off Light control switch in tail or head position	9.5 to 14 V

HINT:

Since the A79 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 LH connectors are connected inside the headlight assembly, the voltage and pulses cannot be checked directly. The values listed are for reference only.

(d) 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
A79-11 (TNS) - Body ground	LA-LG - Body ground	Front turn signal light signal input	Power switch on (IG), front turn signal light off	Below 1 V
A79-11 (TNS) - Body ground	LA-LG - Body ground	Front turn signal light signal input	Power switch on (IG), front turn signal light blinking	11 to 14 V ←→ Below 1 V
A79-16 (SBR) - A79-15 (SGR)	LG - G	Rear height control sensor sub-assembly LH power supply	Power switch on (IG)	4.75 to 5.25 V
A79-17 (SHRL) - A79-15 (SGR)	BE - G	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)
A79-19 (LINS) - Body ground	P - Body ground	LIN communication line	Power switch off	Below 1 V
A79-19 (LINS) - Body ground	P - Body ground	LIN communication line	Power switch on (IG)	Pulse generation
A79-20 (LINL) - Body ground	L - Body ground	LIN communication line	Power switch off	Below 1 V
A79-20 (LINL) - Body ground	L - Body ground	LIN communication line	Power switch on (IG)	Pulse generation
A79-23 (CANL) - Body ground	W - Body ground	CAN communication line	Power switch off	Below 1 V
A79-23 (CANL) - Body ground	W - Body ground	CAN communication line	Power switch on (IG)	Pulse generation
A79-24 (CANH) - Body ground	P - Body ground	CAN communication line	Power switch off	Below 1 V
A79-24 (CANH) - Body ground	P - Body ground	CAN communication line	Power switch on (IG)	Pulse generation
B-2 (LOLED2) - B-3 (LOLED1)	-	Low beam headlights drive output	Low beam headlights off	Below 1 V
B-2 (LOLED2) - B-3 (LOLED1)	-	Low beam headlights drive output	Low beam headlights on	10 to 19 V
B-4 (FANB) - B-14 (FANG)	-	Headlight fan power source	Low beam headlights off	Below 1 V
B-4 (FANB) - B-14 (FANG)	-	Headlight fan power source	Low beam headlights on	4.75 to 5.25 V
B-9 (ACTBI) - B-17 (ACTGI)	-	Headlight swivel and leveling motor power source	Power switch off	Below 1 V
B-9 (ACTBI) - B-17 (ACTGI)	-	Headlight swivel and leveling motor power source	Power switch on (IG)	11 to 14 V
B-10 (DRL/CLL+) - B-1 (DRL/CLL-)	-	Parking lights/daytime running lights power source	Parking lights and daytime running lights off	Below 1 V
B-10 (DRL/CLL+) - B-1 (DRL/CLL-)	-	Parking lights/daytime running lights power source	Parking lights and daytime running lights on	11 to 14 V
B-15 (FANP) - B-14 (FANG)	-	Headlight fan control signal input	Low beam headlights off	Below 1 V
B-15 (FANP) - B-14 (FANG)	-	Headlight fan control signal input	Low beam headlights on	Pulse generation
B-16 (PWM1) - B-1 (DRL/CLL-)	-	Parking lights/daytime running lights control signal output	Parking lights and daytime running lights off	Below 1 V
B-16 (PWM1) - B-1 (DRL/CLL-)	-	Parking lights/daytime running lights control signal output	Parking lights and daytime running lights on	Pulse generation
B-18 (FSML+) - B-12 (FSML-)	-	Front side marker light drive output	Front side marker light off	Below 1 V
B-18 (FSML+) - B-12 (FSML-)	-	Front side marker light drive output	Front side marker light on	11 to 14 V
B-19 (HI_SOL+) - B-11 (HI_SOL-)	-	High beam headlights drive output	High beam headlights off	Below 1 V
B-19 (HI_SOL+) - B-11 (HI_SOL-)	-	High beam headlights drive output	High beam headlights on	11 to 14 V
B-20 (TURN+) - B-13 (TURN-)	-	Front turn signal light signal output	Power switch on (IG), front turn signal light off	Below 1 V
B-20 (TURN+) - B-13 (TURN-)	-	Front turn signal light signal output	Power switch on (IG), front turn signal light blinking	11 to 14 V ←→ Below 1 V
C-4 (LINSI) - Body ground	-	LIN communication line	Power switch off	Below 1 V
C-4 (LINSI) - Body ground	-	LIN communication line	Power switch on (IG)	Pulse generation
C-13 (LINLI) - Body ground	-	LIN communication line	Power switch off	Below 1 V
C-13 (LINLI) - Body ground	-	LIN communication line	Power switch on (IG)	Pulse generation

CHECK HEADLIGHT ECU SUB-ASSEMBLY RH

(a) Disconnect the A80 headlight ECU sub-assembly RH connector.

(b) Measure the voltage and resistance on the wire harness side connector according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
A80-4 (IG) - Body ground	B - Body ground	Ignition power supply	Power switch off	Below 1 V
A80-4 (IG) - Body ground	B - Body ground	Ignition power supply	Power switch on (IG)	11 to 14 V
A80-12 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
A80-13 (ECUB) - Body ground	BE - Body ground	Auxiliary battery power supply	15 seconds or more after power switch turned off Light control switch off	Below 1 V
A80-13 (ECUB) - Body ground	BE - Body ground	Auxiliary battery power supply	Power switch on (IG) or within 15 seconds after power switch turned off Light control switch in tail or head position	9.5 to 14 V

HINT:

Since the A80 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.

(d) 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
A80-11 (TNS) - Body ground	LA-G - Body ground	Front turn signal light signal input	Power switch on (IG), front turn signal light off	Below 1 V
A80-11 (TNS) - Body ground	LA-G - Body ground	Front turn signal light signal input	Power switch on (IG), front turn signal light blinking	11 to 14 V ←→ Below 1 V
A80-19 (LINS) - Body ground	P - Body ground	LIN communication line	Power switch off	Below 1 V
A80-19 (LINS) - Body ground	P - Body ground	LIN communication line	Power switch on (IG)	Pulse generation
A80-20 (LINL) - Body ground	L - Body ground	LIN communication line	Power switch off	Below 1 V
A80-20 (LINL) - Body ground	L - Body ground	LIN communication line	Power switch on (IG)	Pulse generation
A80-23 (CANL) - Body ground	W - Body ground	CAN communication line	Power switch off	Below 1 V
A80-23 (CANL) - Body ground	W - Body ground	CAN communication line	Power switch on (IG)	Pulse generation
A80-24 (CANH) - Body ground	L - Body ground	CAN communication line	Power switch off	Below 1 V
A80-24 (CANH) - Body ground	L - Body ground	CAN communication line	Power switch on (IG)	Pulse generation
B-2 (LOLED2) - B-3 (LOLED1)	-	Low beam headlights drive output	Low beam headlights off	Below 1 V
B-2 (LOLED2) - B-3 (LOLED1)	-	Low beam headlights drive output	Low beam headlights on	10 to 19 V
B-4 (FANB) - B-14 (FANG)	-	Headlight fan power source	Low beam headlights off	Below 1 V
B-4 (FANB) - B-14 (FANG)	-	Headlight fan power source	Low beam headlights on	4.75 to 5.25 V
B-9 (ACTBI) - B-17 (ACTGI)	-	Headlight swivel and leveling motor power source	Power switch off	Below 1 V
B-9 (ACTBI) - B-17 (ACTGI)	-	Headlight swivel and leveling motor power source	Power switch on (IG)	11 to 14 V
B-10 (DRL/CLL+) - B-1 (DRL/CLL-)	-	Parking lights/daytime running lights power source	Parking lights and daytime running lights off	Below 1 V
B-10 (DRL/CLL+) - B-1 (DRL/CLL-)	-	Parking lights/daytime running lights power source	Parking lights and daytime running lights on	11 to 14 V
B-15 (FANP) - B-14 (FANG)	-	Headlight fan control signal input	Low beam headlights off	Below 1 V
B-15 (FANP) - B-14 (FANG)	-	Headlight fan control signal input	Low beam headlights on	Pulse generation
B-16 (PWM1) - B-1 (DRL/CLL-)	-	Parking lights/daytime running lights control signal output	Parking lights and daytime running lights off	Below 1 V
B-16 (PWM1) - B-1 (DRL/CLL-)	-	Parking lights/daytime running lights control signal output	Parking lights and daytime running lights on	Pulse generation
B-18 (FSML+) - B-12 (FSML-)	-	Front side marker light drive output	Front side marker light off	Below 1 V
B-18 (FSML+) - B-12 (FSML-)	-	Front side marker light drive output	Front side marker light on	11 to 14 V
B-19 (HI_SOL+) - B-11 (HI_SOL-)	-	High beam headlights drive output	High beam headlights off	Below 1 V
B-19 (HI_SOL+) - B-11 (HI_SOL-)	-	High beam headlights drive output	High beam headlights on	11 to 14 V
B-20 (TURN+) - B-13 (TURN-)	-	Front turn signal light signal output	Power switch on (IG), front turn signal light off	Below 1 V
B-20 (TURN+) - B-13 (TURN-)	-	Front turn signal light signal output	Power switch on (IG), front turn signal light blinking	11 to 14 V ←→ Below 1 V
C-4 (LINSI) - Body ground	-	LIN communication line	Power switch off	Below 1 V
C-4 (LINSI) - Body ground	-	LIN communication line	Power switch on (IG)	Pulse generation
C-13 (LINLI) - Body ground	-	LIN communication line	Power switch off	Below 1 V
C-13 (LINLI) - Body ground	-	LIN communication line	Power switch on (IG)	Pulse generation

CHECK COMBINATION METER ASSEMBLY

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CHECK FORWARD RECOGNITION CAMERA

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CHECK STEERING SENSOR

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CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY

for NICKEL METAL HYDRIDE BATTERY: Click here

for LITHIUM-ION BATTERY: Click here