Subaru Workshop Service and Repair Manuals

Pressure Sensor Harness

Pressure Sensor Testing

CHECK ECU HARNESS

1.

With ignition switch "OFF," disconnect ECU connector.

2.

Measure resistance between ECU connector and pressure sensor connector as follows:

Connector & terminal:

Resistance:

(F121)1-(F115)2

Below 1 Ohm

(F121)2-(F115)2

Below 1 Ohm

(F121)3-(F115)1

Below 1 Ohm

(F121)2-(F115)3

Below 1 Ohm

3.

Connect ECU connector and measure resistance between pressure sensor connector (F115) terminals:

Connector & terminal:

Resistance:

(F115)1-(F115)2

Infinite

(F115)3-(F115)2

Infinite

CHECK PRESSURE SENSOR VOLTAGE

1.

With ignition "ON," voltage across pressure sensor connector terminals should be as follows:

Connector & terminal:

Voltage:

(F115)3-(F115)2

4.5-5.5V

2.

Connect pressure sensor connector and turn ignition "ON."

3.

Measure voltage across ECU connector terminals as follows:

Connector & terminal:

Voltage: [1]

(F121)3-(F121)1

3.4-3.8V

(F121)3-(F121)2

3.4-3.8V