Ultrasonic Sensor: Inspection

INSPECT NO. 1 ULTRASONIC SENSOR

Measure the resistance of the sensor.

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
1 (E) - 2 (S)	Always	600 to 1,200 kΩ

NOTE: Set the tester to the 100 kΩ range before performing the measurement.

If the result is not as specified, replace the ultrasonic sensor.

Fig 1: Identifying No 1 Ultrasonic Sensor Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT NO. 2 ULTRASONIC SENSOR

Measure the resistance of the sensor.

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
1 (E) - 2 (S)	Always	600 to 1,200 kΩ

NOTE: Set the tester to the 100 kΩ range before performing the measurement.

If the result is not as specified, replace the ultrasonic sensor.

Fig 2: Identifying No 2 Ultrasonic Sensor Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT NO. 3 ULTRASONIC SENSOR

Measure the resistance of the sensor.

Standard resistance:

RESISTANCE SPECIFICATION

Tester Connection [Tester (+) - Tester (-)]

Condition

Specified Condition

3 (S) - 2 (E)

Always

30 to 50 kΩ

2 (E) - 3 (S)

Always

30 to 50 kΩ

1 (T) - 2 (E)⁽¹⁾

Always

230 to 430 kΩ

2 (E) - 1 (T)⁽¹⁾

Always

1 MΩ or higher

Set the tester to the 100 kΩ range before performing the measurement.

NOTE:

⁽¹⁾	Measurement values may vary depending on the tester used. If results seem inaccurate, reverse the polarity (+-) and measure again.

If the result is not as specified, replace the ultrasonic sensor.

Fig 3: Identifying No 3 Ultrasonic Sensor Connector Terminals