Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: 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.

HINT:

*: Malfunction monitoring is not performed under the following conditions, in order to prevent erroneous detection.

• After engine switch is turned on (ACC) for 3 seconds or more.
• After the battery voltage returns to normal for 3 seconds.
• Before 3 seconds have elapsed after battery voltage has returned to normal.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Refer to when replacing the ECM.

PROCEDURE

(a) Clear the DTCs.

NEXT

(a) Check for DTCs.

OK:

DTC P033531 is not output.

OK

USE SIMULATION METHOD TO CHECK

NG

(a) Disconnect the G68 stereo component equalizer assembly connector.

(b) Disconnect the A18 ECM connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

(a) According to the table and using an oscilloscope, measure the waveform with the stereo component equalizer assembly connected.

OK:

The waveform is similar to that shown in the illustration.

HINT:

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

OK

REPLACE STEREO COMPONENT EQUALIZER ASSEMBLY

NG

GO TO SFI SYSTEM