Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual - part 133

FU(w/o STI)-59

Main Relay

FUEL INJECTION (FUEL SYSTEMS)

3) Connect battery positive terminal to terminal No.

3 and battery ground terminal to terminal No. 4, and

measure the resistance between the main relay ter-

minals.

Terminal No.

Standard

1 and 2

Less than 1 Ω

FU-04077

1
2

3 4

(1)

(2)

(1)

(4)

(2)

(3)

(3)

(4)

FU(w/o STI)-60

Fuel Pump Relay

FUEL INJECTION (FUEL SYSTEMS)

20.Fuel Pump Relay

A: REMOVAL

1) Disconnect the ground cable from battery.

2) Remove the fuel pump relay from the relay block

on the back side of the glove box.

B: INSTALLATION

Install in the reverse order of removal.

C: INSPECTION

1) Check that the fuel pump relay has no deforma-

tion, cracks or other damages.

2) Measure the resistance between fuel pump relay

terminals.

IN-00203

FU-03419

Terminal No.

Standard

1 and 2

1 MΩ or more

3 and 4

93.8 — 136.4 Ω 

(when 20°C (68°F))

1
2

3 4

(1)

(2)

(1)

(4)

(2)

(3)

(3)

(4)

IN-02836

FU(w/o STI)-61

Fuel Pump Relay

FUEL INJECTION (FUEL SYSTEMS)

3) Connect battery positive terminal to terminal No.

3 and battery ground terminal to terminal No. 4, and

measure the resistance between the fuel pump re-

lay terminals.

Terminal No.

Standard

1 and 2

Less than 1 Ω

FU-04077

1
2

3 4

(1)

(2)

(1)

(4)

(2)

(3)

(3)

(4)

FU(w/o STI)-62

Electronic Throttle Control Relay

FUEL INJECTION (FUEL SYSTEMS)

21.Electronic Throttle Control 

Relay

A: REMOVAL

1) Disconnect the ground cable from battery.

2) Remove the electronic throttle control relay from

the relay block on the back side of the glove box.

B: INSTALLATION

Install in the reverse order of removal.

C: INSPECTION

1) Check  that  the  electronic  throttle  control  relay

has no deformation, cracks or other damages.

2) Measure  the  resistance  between  electronic

throttle control relay terminals.

IN-00203

FU-03420

Terminal No.

Standard

1 and 2

1 MΩ or more

3 and 4

93.8 — 136.4 Ω 

(when 20°C (68°F))

1
2

3 4

(1)

(2)

(1)

(4)

(2)

(3)

(3)

(4)

IN-02836