Suzuki SY413 Service Manual page 2816

TABLE B-2 FUEL PUMP AND ITS CIRCUIT CHECK
"LAMP"
INSPECTION
STEP
1 Check Fuel Pump Control System for Operation. See Fig.
1.
Is fuel pump heard to operate for 3 sec. after ignition
switch ON?
2 Check Fuel Pump for Operation.
1) Remove fuel pump relay from relay box with ignition
switch OFF.
2) Check for proper connection to relay at each terminals.
3) If OK, using service wire, connect terminals E64-1 and
E64-2 of relay connector. See Fig. 2.
CAUTION: Check to make sure that connec-
tion is made between correct terminals.
Wrong connection can cause damage to
ECM, wire harness, etc.
Is fuel pump heard to operate at ignition switch ON?
3 Check Fuel Pump Relay for Operation.
1) Check resistance between each two terminals of fuel
pump. See Fig. 3.
Between terminals 1 and 2
Between terminals 3 and 4
2) Check that there is continuity between terminals 1 and
2 when battery is connected to terminals 3 and 4.
See Fig. 4.
Is fuel pump relay in good condition?
ENGINE GENERAL INFORMATION AND DIAGNOSIS (J18 ENGINE WITH WU TWC) 6-2-99
ACTION
: Infinity
: 70 – 110 W
YES
Fuel pump circuit is Go to Step 2.
in good condition.
Go to Step 3. "P", "B" or "R / B"
circuit open or fuel
pump malfunction.
"Y / Bl" circuit open Replace fuel pump
or poor E92-12 relay.
connection.
If wire and
connection are OK,
substitute a known-
good ECM and
recheck.
1. Main fuse
2. Main relay
3. Relay box
4. Fuel pump relay
5. Fuel pump
NO