Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service 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
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