LIGHTING (EXT): LIGHTING SYSTEM (w/o Headlight ECU): TERMINALS OF ECU; 2019 MY RAV4 RAV4 HV [11/2018

Last Modified: 05-08-2025	6.11:8.1.0	Doc ID: RM100000001EPCJ
Model Year Start: 2019	Model: RAV4	Prod Date Range: [11/2018 - 02/2019]
Title: LIGHTING (EXT): LIGHTING SYSTEM (w/o Headlight ECU): TERMINALS OF ECU; 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]

TERMINALS OF ECU

Main Body ECU (Multiplex Network Body ECU)

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

(a) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

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(b) 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	Ignition switch ON	11 to 14 V
A-32 (IG) - Body ground	None - Body ground	Ignition power supply	Ignition switch off	Below 1 V
A-31 (BECU) - Body ground	None - Body ground	Battery power supply	Always	11 to 14 V
A-30 (ACC) - Body ground	None - Body ground	ACC power supply	Ignition switch ACC	11 to 14 V
A-30 (ACC) - Body ground	None - Body ground	ACC power supply	Ignition switch off	Below 1 V
A-11 (GND1) - Body ground	None - Body ground	Ground	Always	Below 1 Ω

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

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(e) 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*1	G - Body ground	Fog light switch input	Taillights on, fog light switch in Fr position	11 to 14 V
4A-52 (FFGO) - Body ground*1	G - Body ground	Fog light switch input	Taillights on, fog light switch off	Below 1 V
4F-19 - Body ground	BE - Body ground	BKUP LP relay drive output	Ignition switch off, shift lever not in R	Below 1 V
4F-19 - Body ground	BE - Body ground	BKUP LP relay drive output	Ignition switch ON, shift lever in R	11 to 14 V
4F-28 (DRL) - Body ground	LA-GR - Body ground	Daytime running light system drive output	Daytime running light system operating	Below 1 V
4F-28 (DRL) - Body ground	LA-GR - Body ground	Daytime running light system drive output	Daytime running light system not operating	11 to 14 V
4F-31 (HRLY) - Body ground	V - Body ground	H-LP LH relay drive output	Light control switch in HEAD position	Below 1 V
4F-31 (HRLY) - Body ground	V - Body ground	H-LP LH relay drive output	Light control switch off	11 to 14 V
4F-32 (TRLY) - Body ground	LA-B - Body ground	Front fog lights*1, Parking lights and front side marker lights drive output	Light control switch in TAIL or HEAD position	11 to 14 V
4F-32 (TRLY) - Body ground	LA-B - Body ground		Light control switch in OFF3 or DRL OFF4 position	Below 1 V
4H-10 - Body ground	L - Body ground	Back-up lights drive output	Ignition switch ON, shift lever not in R	Below 1 V
4H-10 - Body ground	L - Body ground	Back-up lights drive output	Ignition switch ON, shift lever in R	11 to 14 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
4H-30 (TRLY) - Body ground	LA-R - Body ground	Taillights and license plate lights drive output	Light control switch in OFF3 or DRL OFF4 position	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	Ignition switch ON, auto high beam switch on	Below 1 V
G45-21 (AHID) - Body ground	R - Body ground	Auto high beam switch indicator drive output	Ignition switch ON, auto high beam switch off	11 to 14 V
G44-12 (HRY2) - Body ground	BE - Body ground	H-LP RH relay drive output	Light control switch in HEAD position	Below 1 V
G44-12 (HRY2) - Body ground	BE - Body ground	H-LP RH relay drive output	Light control switch in OFF3 or DRL OFF4 position	11 to 14 V
G44-13 (DIM) - Body ground	G - Body ground	High beam headlight drive output	Light control switch in HEAD position and headlight dimmer switch in high or high flash position	Below 1 V
G44-13 (DIM) - Body ground	G - Body ground	High beam headlight drive output	Headlight dimmer switch not in high or high flash position	11 to 14 V
G44-16 (HEAD) - Body ground	LG - Body ground	Light control switch HEAD position input	Light control switch in HEAD position	Below 1 V
G44-16 (HEAD) - Body ground	LG - Body ground	Light control switch HEAD position input	Light control switch not in HEAD position	11 to 14 V
G44-23 (CLTB) - G44-25 (CLTE)*2	BE - GR	Automatic light control sensor power supply output	Ignition switch ON	11 to 14 V
G44-24 (CLTS) - Body ground*2	R - Body ground	Automatic light control sensor signal input	Ignition switch off	Below 1 V
G44-24 (CLTS) - Body ground*2	R - Body ground	Automatic light control sensor signal input	Ignition switch ON	Pulse generation (See waveform 1)
G44-26 (AHBI) - Body ground	G - Body ground	Auto high beam switch signal input	Auto high beam switch on	Below 1 V
G44-26 (AHBI) - Body ground	G - Body ground	Auto high beam switch signal input	Auto high beam switch off	11 to 14 V

*1: w/ Front Fog Light
*2: w/ Automatic Light Control System
*3: w/ Light Control Switch off Position
*4: w/ DRL OFF Switch

(1) Waveform 1

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

HINT:

The communication waveform changes according to the surrounding brightness.

CHECK COMBINATION METER ASSEMBLY

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CHECK FORWARD RECOGNITION CAMERA

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CHECK STEERING SENSOR

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