Check Operation Of Fuel Pump In D-Check Mode; Check Fuel Pump Relay; Check Power Supply Circuit Of Fuel Pump Relay; Check Voltage For Fuel Pump - Subaru SVX 1992 Manual

FUEL INJECTION SYSTEM
[T8D7) 2-7
1 . CHECK OPERATION
OF FUEL PUMP IN
D-CHECK MODE.
1) Connect test mode terminal .
2) Turn ignition switch to "ON" .
3) Check fuel pump for proper operation .
2. CHECK FUEL PUMP RELAY.
1) Disconnect fuel pump relay connector, and remove
fuel pump relay from bracket.
2) Measure resistance relay coil .
Connector & Terminal/Specified resistance
Fuel pump relay connector terminal :
No . 1 - No . 3/70 f2
3) Connect battery (12 V) to fuel pump relay coil termi-
nals, and check continuity between switching terminals.
Relay must issue clicks .
Connector it Terminal/Specified resistance
Fuel pump relay connector terminal :
No . 2 - No . 4/0 0
(No. 1 : Battery (@+)
(No. 1 : Battery E))
o
n o
I
~~A
0
Fuel pump relay
2 1
4 3
B2-322
Fig . 50
3. CHECK POWER SUPPLY CIRCUIT OF FUEL
PUMP RELAY.
1) Turn ignition switch to "OFF", and connect connec-
tor (1351) to fuel pump relay.
2) Turn ignition switch to "ON", and measure voltage
between fuel pump relay and body .
Connector Fr Terminal/Specified voltage
(1351) No. 1 - Body/10 V, min.
4. CHECK INPUT SIGNAL FOR ECU.
1) Turn ignition switch to "ON" .
2) Measure voltage between ECU connector (1347) and
body .
Connector £r Terminal/Specified voltage
(1362) No . 23 - Body/10 V, min .
3) Measure voltage at same terminal while cranking the
engine .
Connector £r Terminal/Specified voltage
(1362) No . 23 - Body/0 V
5. CHECK HARNESS CONNECTOR BETWEEN
ECU AND FUEL PUMP RELAY .
1) Turn ignition switch to "OFF".
2) Disconnect ECU connector (1362) and fuel pump
relay connector (1351) .
3) Measure resistance of connector terminals between
ECU and fuel pump relay.
Connector [t Terminal/Specified resistance
(1362) No . 23 - (1351) No. 3/0 C1
4) Measure resistance between fuel pump connector
terminal and body to check short circuit.
Connector fr Terminal/Specified resistance
(R23) No . 3 - Body / 1 Q min .
6. CHECK VOLTAGE FOR FUEL PUMP .
1) Fold down the rear seat back, and turn up the floor
mat.
2) Remove access hole lid .
3) Disconnect fuel pump connector (1123) .
4) Measure voltage between connector (1323) and body
while cranking the engine .
Connector £r Terminal/Specified voltage
(1123) No. 1 - Body/10 V, min.
Fuel pump
connector
I
c2-o2s
Fig . 51
7. CHECK FUEL PUMP .
1) Connect battery (12 V) to proper fuel pump connec-
tor terminals to check fuel pump operation .
Terminal
No. 1 -> Battery +@
No . 4 -~ Battery E)
51