Suzuki GA413, Service Manual

Page: 869 / 1246

CAUTION: Check to make sure that connection is
made between correct terminals. Wrong connec-
tion can cause damage to ECM, wire harness, etc.
ENGINE GENERAL INFORMATION AND DIAGNOSIS 6-93
GA413
supple
TABLE B-2 FUEL PUMP AND ITS CIRCUIT CHECK
1. Ignition switch
2. Main relay
3. Main relay
4. Main fuse
5. Fuel pump relay
6. Fuel pump
INSPECTION
STEP ACTION YES NO
1 Was “ENGINE DIAG. FLOW TABLE” performed? Go to Step 2. Go to “ENGINE
DIAG. FLOW
TABLE”.
2 Check Fuel Pump Control System for Operation. See Fig. 1.
Is fuel pump heard to operate for 2 sec. after ignition switch
ON? Fuel pump circuit
is in good
condition. Go to Step 3.
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 “A” and “B” of
relay connector. See Fig. 2.
Is fuel pump heard to operate at ignition switch ON?
Go to Step 4. “PNK”, “BLK” or
“BLK/RED” circuit
open or fuel pump
malfunction.
4 Check Fuel Pump Relay for Operation.
1) Check resistance between each two terminals of fuel
pump relay. See Fig.3.
Between terminals “A” and “B”: Infinity
Between terminals “C” and “D”: 56 – 146
2) Check that there is continuity between terminals “A” and
“B” when battery is connected to terminals “C” and “D”.
See Fig. 3.
Is fuel pump relay in good condition?
“PNK/BLK” circuit
open or poor
L20-32 connection.
If wire and
connection are
OK, substitute a
known-good ECM
and recheck. Replace fuel pump
relay.