Toyota Yaris: Active Noise Control System / Crankshaft Position Sensor "A" No Signal (P033531)

Toyota Yaris XP210 (2020-2025) Reapir and Service Manual / Audio & Visual & Telematics / Audio / Video / Active Noise Control System / 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.

After ignition switch is turned to ACC for 3 seconds or more.
After the auxiliary battery voltage returns to normal for 3 seconds.
Before 3 seconds have elapsed after auxiliary battery voltage has returned to normal.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

The active noise control system troubleshooting procedure is based on the premise that the stop and start system, SFI system and smart key system is operating normally. Check the stop and start system, SFI system and smart key system first before troubleshooting the active noise control system.

PROCEDURE

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Active Noise Control > Clear DTCs

2.	CHECK FOR DTC

(a) Check for DTCs.

Body Electrical > Active Noise Control > Trouble Codes

OK:

DTC P033531 is not output.

Result	Proceed to
DTC P033531 is not output	A
DTC P033531 is output	B

USE SIMULATION METHOD TO CHECK

3.	CHECK HARNESS AND CONNECTOR (STEREO COMPONENT EQUALIZER ASSEMBLY - ECM)

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

(b) Disconnect the A106 ECM connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
O131-3 (NEI) - A106-16 (NEO)	Always	Below 1 Ω

REPLACE STEREO COMPONENT EQUALIZER ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

Rear Door Right Speaker Circuit Actuator Stuck (B1AB271)

DESCRIPTION This DTC is output when a malfunction occurs in the right side rear speaker system. DTC No. Detection Item DTC Detection Condition Trouble Area B1AB271 Rear Door Right Speaker Circuit Actuator Stuck When starting the system from IG OFF → ACC ON, the stereo component equalizer assembly detects a malfunction in the right side rear speaker system* Harness or connector Rear speaker assembly RH Stereo component equalizer assembly HINT: *: To prevent false positives, fault monitoring is not performed in the following conditions: Auxiliary battery voltage has decreased to 9...

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...

Other information:

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