Suzuki GA413, Service Manual

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ENGINE GENERAL INFORMATION AND DIAGNOSIS 6-83
GA413
supple
DTC P0480
INSPECTION
STEP ACTION YES NO
1 Was “ENGINE DIAG. FLOW TABLE” performed? Go to Step 2. Go to “ENGINE DIAG.
FLOW TABLE”.
2 1) With ignition switch OFF position, install SUZU-
KI scan tool.
2) Start engine and run it at idle.
3) Observe engine coolant temperature on scan
tool.
Does cooling fan turn ON when engine coolant
temperature reaches above 90 C (194 F)?
Radiator fan control sys-
tem is functioning nor-
mally.
Go to Step3.
3 1) Stop engine.
2) With ignition switch OFF position, disconnect
radiator fan relay.
3) Inspect radiator fan relay. Refer to “Main Relay/
Fuel Pump Relay/Radiator Fan Relay Inspec-
tion” in Section 6E.
Is radiator fan relay functioning normally?
Go to Step 4. Faulty radiator fan relay.
4 1) Turn ignition switch ON position, leaving engine
OFF.
2) Measure voltage from “a” of radiator fan relay
connector to ground, from “c” of radiator fan
relay connector to ground. See Fig.1.
Is each voltage within 10-14V?
Go to Step 5. Faulty “BLU/WHT”,
“BLK/RED” wire.
5 1) Turn ignition switch OFF position.
2) Connect jumper wire between “a” and “b” of
radiator fan relay connector. See Fig.2.
Does cooling fan turn ON when ignition switch
turns ON position, leaving engine OFF?
Faulty “RED/GRN” wire.
If wire and connection
are OK, substitute a
known-good ECM and
recheck.
Faulty “BLU/RED”,
“BLK” wire.
Faulty radiator fan mo-
tor.
Poor connection.
Fig. 1 for Step 4 Fig. 2 for Step 5