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

TERMINALS OF ECU

METER MIRROR SUB-ASSEMBLY

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Signal Input/Output	Condition	Specified Condition
H1-1 (IG) - Body ground	L - Body ground	Power switch signal	-	Power switch off → Power switch on (IG)	Below 1 V → 11 to 14 V
H1-2 (B) - Body ground	P - Body ground	Auxiliary battery	-	Power switch off	11 to 14 V
H1-4 (ES) - Body ground	W-B - Body ground	Ground	-	Always	Below 1 Ω
H1-12 (MPX1)	P	CAN communication line	Input/Output	-	-
H1-13 (MPX2)	R	CAN communication line	Input/Output	-	-
H1-14 (TX+)	L	Local bus communication line	Input/Output	-	-
H1-15 (TX-)	GR	Local bus communication line	Input/Output	-	-

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Airbag System(for Gasoline Model): Curtain Shield Airbag Sensor Lost Communication (LH) (B1637,B1638)
DESCRIPTION The side collision sensor LH circuit (bus 1) consists of the airbag ECU assembly, side airbag pressure sensor LH and side No. 2 airbag sensor LH. The side airbag pressure sensor LH and side No. 2 airbag sensor LH detect impacts to the vehicle and send signals to the airbag ECU assembly t ...

Toyota Avalon (XX50) 2019-2022 Owners Manual