Inspection Procedure

PREPARATION: 

Remove the vehicle speed sensor from the transmission.

CHECK: 

Measure resistance between terminals 1 and 2 of the speed sensor.

OK: 

Resistance: 560 - 680 Ω at 20 °C (68 °F) 

Reference: 

Check vehicle speed sensor's function 

CHECK: 

Check voltage between terminals 1 and 2 of the vehicle speed sensor when a magnet is put close to front end of the vehicle speed sensor then taken away quickly.

OK: 

Voltage is generated intermittently 

HINT:

The generated voltage is extremely low.

Fig 1: Measuring Resistance Between Terminals 1 And 2 Of Speed Sensor

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Reference: INSPECTION USING OSCILLOSCOPE 

Refer to the chart for waveform between terminals SP2⁺ and SP2^- When the vehicle speed is approx. 60 km/h (37 mph).

Fig 2: Inspection Oscilloscope Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG : Replace vehicle speed sensor. 
2. OK : Go to next step. 

PREPARATION: 

1. Install the vehicle speed sensor to the transmission.
2. Remove the instrument panel under cover.
3. Disconnect the connector of the ECM.

CHECK: 

Check resistance between terminals SP2⁺ and SP2^- of the ECM connector.

OK: 

Resistance: 560 - 680 Ω at 20 °C (68 °F) 

CHECK: 

Measure resistance between terminals SP2⁺ and SP2^- of the ECM connector and body ground.

OK: 

Resistance: 1 MΩ or higher 

Fig 3: Checking Resistance Between Terminals SP2

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. OK : Check and replace ECM (See  HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE  ). 
2. NG : Go to next step. 

1. NG : Replace or repair wire harness or connector. 
2. OK : Check and repair the transmission (clutch, brake or gear etc.).