Toyota Avalon V6-3.5L (2GR-FE) Manufacturer Code Page 973

Toyota Avalon V6-3.5L (2GR-FE) Manufacturer Code Page 973

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (SPEED SENSOR CIRCUIT)

OK -- Continue to next step.

9. INSPECT SPEED SENSOR AND SENSOR ROTOR SERRATIONS

(a) INSPECTION USING OSCILLOSCOPE

(1) Disconnect the front speed sensor connector.

(2) Connect the oscilloscope to terminals 1 and 2 of the front speed sensor.

(3) Check that a waveform is output when the tires are rotated.

OK:

A waveforms as shown in the figure should be output.

HINT

* As vehicle speed (wheel rotation speed) increases, the width of the waveform narrows and the fluctuation in the output voltage

becomes greater.

* When noise is identified in the waveform on the oscilloscope, error signals are generated due to rotor scratches, looseness or

foreign matter attached to the speed sensor.

NG -- INSPECT SPEED SENSOR TIP

OK -- Continue to next step.

10. READ VALUE USING TECHSTREAM (FRONT SPEED SENSOR)

(a) Connect the Techstream to the DLC3.

(b) Start the engine.

(c) Select the Data List mode on the Techstream.

ABS/VSC/TRAC

(d) Check that there is no difference between the speed value output from the speed sensor displayed on the Techstream and the speed

value displayed on the speedometer when driving the vehicle.