Toyota Yaris: Active Noise Control System / Power Source Circuit

Toyota Yaris XP210 (2020-2024) Reapir and Service Manual / Audio & Visual & Telematics / Audio / Video / Active Noise Control System / Power Source Circuit

DESCRIPTION

This circuit is the power source circuit for the stereo component equalizer assembly.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses and relays for circuits related to this system before performing the following procedure.

PROCEDURE

1.	CHECK HARNESS AND CONNECTOR (STEREO COMPONENT EQUALIZER ASSEMBLY POWER SOURCE)

(a) Disconnect the O131 stereo component equalizer assembly connector.

*a	Front view of wire harness connector (to stereo component equalizer assembly)

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
O131-15 (+B) - Body ground	Ignition switch off	10.5 to 16 V
O131-29 (IGP) - Body ground	Ignition switch ON	11 to 14 V
O131-14 (ACC) - Body ground	Ignition switch ACC	10.5 to 16 V

Standard Resistance:

Tester Connection	Condition	Specified Condition
O131-30 (GND) - Body ground	Always	Below 1 Ω

Result	Proceed to
OK	A
NG (except IGP circuit)	B
NG (for IGP circuit)	C

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

GO TO STOP AND START SYSTEM

REPAIR OR REPLACE HARNESS OR CONNECTOR

Crankshaft Position Sensor "A" No Signal (P033531)

DESCRIPTION This DTC is output when a malfunction has occurred in the engine pulse signal system from the ECM. DTC No. Detection Item DTC Detection Condition Trouble Area P033531 Crankshaft Position Sensor "A" No Signal Stereo component equalizer assembly detects malfunction in engine pulse signal system for 10 seconds or more continuously when engine speed is between 500 and 6000 rpm* Harness or connector ECM Stereo component equalizer assembly HINT: *: Malfunction monitoring is not performed under the following conditions, in order to prevent erroneous detection...

Lost Communication With ECM/PCM "A" Missing Message (U010087,U012987,U014087)

DESCRIPTION These DTCs are stored when a malfunction occurs in the CAN communication circuit. DTC No. Detection Item DTC Detection Condition Trouble Area U010087 Lost Communication With ECM/PCM "A" Missing Message When the stereo component equalizer assembly detects a CAN communication malfunction in the engine system for 1 second or more continuously 3 seconds after the ignition switch is turned to ON* CAN communication system U012987 Lost Communication With Brake System Control Module Missing Message When the stereo component equalizer assembly detects a CAN communication malfunction in the brake system for 1 second or more continuously 3 seconds after the ignition switch is turned to ON* CAN communication system U014087 Lost Communication with Body Control Module Missing Message When the stereo component equalizer assembly detects a CAN communication malfunction in the main body ECU for 3 seconds or more continuously 3 seconds after the ignition switch is turned to ON* CAN communication system HINT: *: Malfunction monitoring is not performed under the following conditions, in order to prevent erroneous detection...

Other information:

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