Subaru Workshop Service and Repair Manuals

Connector & terminal:

Voltage:

(B58)2-Ground

4.7V (throttle fully closed)
1.6V (throttle fully open)

(B58)3-Ground

5V

(B58)1-Ground

0V

Throttle Sensor Testing

CHECK THROTTLE SENSOR

1.

Disconnect throttle sensor connector.

2.

Measure resistance between sensor terminals #2 and #3.  It should read 12K Ohms.

3.

Measure resistance between terminals while slowly moving throttle from "closed" to "open:"

Terminal:

Resistance:

#2-#4

1K Ohms (throttle fully closed)
4.3K Ohms (throttle fully open)

NOTE: Check that resistance increases smoothly as throttle is opened.

CHECK HARNESS BETWEEN ECU AND THROTTLE SENSOR

1.

Disconnect ECU and throttle sensor connectors.

2.

Measure resistance between ECU and sensor connectors as follows:

Connector & terminal:

Resistance:

(B58)1-(E8)2

0 Ohms

(B58)2-(E8)4

0 Ohms

(B58)3-(E8)3

0 Ohms

3.

Measure resistance between throttle sensor connectors and ground as follows:

Connector & terminal:

Resistance:

(E8)2-Ground

1M Ohms min.

(E8)4-Ground

1M Ohms min.

(E8)3-Ground

1M Ohms min.