subaru Workshop Repair Guides

Subaru Workshop Service and Repair Manuals

Manifold Pressure/Vacuum Sensor > < Intake Air Temperature Sensor|Specifications|Page 1507
Page 2
background image

Pressure Sensor Harness

CHECK VOLTAGE AND RESISTANCE

1.

With ignition "ON" and engine not running, measure voltage across ECU connector terminals as follows:

Connector & terminal:

Voltage:

(F121)6-(F121)1

0.15-4.85V

(F121)6-(F121)2

0.15-4.85V

2.

With ignition "OFF," disconnect ECU connector and measure resistance between ECU connector and sensor connector as follows:

Connector & terminal:

Resistance:

(F121)6-(F113)2

Below 1 Ohm

(F121)1-(F113)1

Below 1 Ohm

(F121)2-(F113)1

Below 1 Ohm

3.

Measure resistance between ECU connector terminal (F121)6 and ground. It should be infinite.

Air Temperature Sensor Testing

CHECK AIR TEMPERATURE SENSOR

1.

With ignition switch "OFF," disconnect sensor connector.

2.

Measure resistance between sensor terminals (F113)1 and (F113)2 for these resistance values:

Resistance:

Temperature: 

2 - 3K Ohms

20° C (68° F)

270 - 370 Ohms

80° C (176° F)

Manifold Pressure/Vacuum Sensor > < Intake Air Temperature Sensor|Specifications|Page 1507