Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Terminals Of Ecu

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Vehicle Exterior / Wiper / Washer / Wiper And Washer System(for Gasoline Model) / Terminals Of Ecu

TERMINALS OF ECU

CHECK WINDSHIELD WIPER MOTOR ASSEMBLY

(a) Disconnect the A26 windshield wiper motor assembly 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
A26-1 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
A26-4 (+B) - Body ground	SB - Body ground	Engine switch on (IG) signal (Power source circuit)	Engine switch on (IG)	11 to 14 V
			Less than approximately 60 seconds after engine switch turned off	11 to 14 V
			Approximately 60 seconds or more after engine switch turned off	Below 1 V

HINT:

Since the A26 windshield wiper motor assembly connector is a waterproof type connector, the voltage and pulses cannot be checked directly. The values listed are for reference only.

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

Terminal No.

(Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

A26-2 (LIN) - Body ground

R - Body ground

LIN communication signal

Engine switch on (IG)

Pulse generation

A26-3 (2S) - Body ground

B - Body ground

Windshield wiper motor assembly HI operation signal

Windshield wiper motor assembly stopped

4.8 to 5.2 V

Windshield wiper motor assembly operating in HI

Below 1 V

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
4D-3 - Body ground	LA - Body ground	Ground	Always	Below 1 Ω
4F-1 - Body ground	LG - Body ground	Battery power supply	Always	11 to 14 V
4K-1 - Body ground	W - Body ground	Battery power supply	Always	11 to 14 V

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
4F-2 - Body ground	R - Body ground	Washer circuit IG power source	Engine switch on (IG)	11 to 14 V
G32-3 (LIN3) - Body ground	BE - Body ground	LIN communication line	Engine switch on (IG)	Pulse generation
G32-12 (FWSR) - Body ground	L - Body ground	WASHER Relay operation signal	Engine switch on (IG), front washer switch off	11 to 14 V
G32-12 (FWSR) - Body ground	L - Body ground	WASHER Relay operation signal	Engine switch on (IG), front washer switch on	Below 2 V
G33-21 (WPS) - Body ground	LG - Body ground	WIPER Relay operation signal	Engine switch on (IG)	11 to 14 V
			Less than approximately 60 seconds after engine switch turned off	11 to 14 V
			Approximately 60 seconds or more after engine switch turned off	Below 1 V

CHECK COMBINATION METER ASSEMBLY

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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Terminals Of Ecu

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