Suzuki Wagon R Manual page 443

6-104 ENGINE DIAGNOSIS
TABLE B-2 FUEL PUMP AND ITS CIRCUIT CHECK
Ignition
switch
Main relay
Main
fuse
INSPECTION
STEP
1 Was "ENGINE DIAG. FLOW TABLE" performed?
2 Check Fuel Pump Control System for Operation. See Fig. 1.
Is fuel pump heard to operate for 2 sec. after ignition switch
ON?
3 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 E52-3 and
E52-4 of relay connector. See Fig. 2.
CAUTION: Check to make sure that connection is
made between correct terminals. Wrong connec-
tion can cause damage to ECM, wire harness, etc.
Is fuel pump heard to operate at ignition switch ON?
4 Check Fuel Pump Relay for Operation.
1) Check resistance between each two terminals of fuel
pump relay. See Fig.3.
Between terminals "c" and "d": Infinity
Between terminals "a" and "b": 100 – 150 Ω
2) Check that there is continuity between terminals "c" and
"d" when battery is connected to terminals "a" and "b". See
Fig. 3.
Is fuel pump relay in good condition?
Main relay
Fuel pump relay
Fuel pump
ACTION
E22-19
YES
Go to Step 2.
Fuel pump circuit
is in good
condition.
Go to Step 4.
"G" circuit open or
poor E22-19
connection.
If wire and
connection are
OK, substitute a
known-good ECM
and recheck.
NO
Go to "ENGINE
DIAG. FLOW
TABLE".
Go to Step 3.
"P", "B" or "B/R"
circuit open or fuel
pump malfunction.
Replace fuel pump
relay.