Toyota Yaris: Active Noise Control System / Terminals Of Ecu

Toyota Yaris XP210 (2020-2026) Reapir and Service Manual / Audio & Visual & Telematics / Audio / Video / Active Noise Control System / Terminals Of Ecu

TERMINALS OF ECU

CHECK STEREO COMPONENT EQUALIZER ASSEMBLY

Terminal No. (Symbol)	Terminal Description	Condition	Specified Condition
O131-15(+B) - O131-30(GND)	Power source	Always	11 to 14 V
O131-29(IGP) - O131-30(GND)	Power source (IG)	Ignition switch ON	11 to 14 V
O131-14(ACC) - O131-30(GND)	Power source (ACC)	Ignition switch ACC	11 to 14 V
O131-30(GND) - Body ground	Ground	Always	Below 1 Ω
O132-1(MC1+) - O131-30(GND)	Active noise control microphone input signal	Active noise control microphone LH tapped with finger	Pulse generation
O132-5(MC1-) - O131-30(GND)	Active noise control microphone input signal	Always	Below 1 Ω
O132-2(MC2+) - O131-30(GND)	Active noise control microphone input signal	Active noise control microphone RH tapped with finger	Pulse generation
O132-6(MC2-) - O131-30(GND)	Active noise control microphone input signal	Always	Below 1 Ω
O131-3(NEI) - O131-30(GND)	Engine pulse signal	Idling with warm engine	Pulse generation (See waveform 1)
O131-24(FLI-)	Active noise control microphone output signal	-	-
O131-9(FLI+)	Active noise control microphone output signal	-	-
O131-23(FRI-)	Active noise control microphone output signal	-	-
O131-8(FRI+)	Active noise control microphone output signal	-	-
O131-5(RRI+)	Active noise control microphone output signal	-	-
O131-20(RRI-)	Active noise control microphone output signal	-	-
O131-6(RLI+)	Active noise control microphone output signal	-	-
O131-21(RLI-)	Active noise control microphone output signal	-	-
O131-7(ASG1)	Shield ground	-	-
O131-22(ASG2)	Shield ground	-	-
O131-12(FR+) - O131-30(GND)	Sound signal	Active noise control system operating	Pulse generation
O131-27(FR-) - O131-30(GND)	Sound signal	Active noise control system operating	Pulse generation
O131-13(FL+) - O131-30(GND)	Sound signal	Active noise control system operating	Pulse generation
O131-28(FL-) - O131-30(GND)	Sound signal	Active noise control system operating	Pulse generation
O131-10(RR+) - O131-30(GND)	Sound signal	Active noise control system operating	Pulse generation
O131+25(RR-) - O131-30(GND)	Sound signal	Active noise control system operating	Pulse generation
O131-11(RL+) - O131-30(GND)	Sound signal	Active noise control system operating	Pulse generation
O131-28(RL-) - O131-30(GND)	Sound signal	Active noise control system operating	Pulse generation
O131-1(CANH)	CAN communication signal	-	-
O131-16(CANL)	CAN communication signal	-	-

(a) Waveform 1

HINT:

The oscilloscope waveform shown in the illustration is an example for reference only. The waveform fluctuates according to engine speed.

Item	Condition
Measurement terminal	O131-3 (NEI) - O131-28 (GND)
Tool setting	5 V/DIV., 20 ms./DIV.
Vehicle condition	Idling with warm engine

Problem Symptoms Table

PROBLEM SYMPTOMS TABLE NOTICE: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table...

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