Suzuki WagonR+ RB310 Service Manual page 2447

6-88 ENGINE DIAGNOSIS
DTC P0480 RADIATOR COOLING FAN CONTROL SYSTEM MALFUNCTION
CIRCUIT DESCRIPTION
Relay
box
"Fl"
"RDTR"
(Radiator fan)
DTC DETECTING CONDITION
D Low voltage at terminal E22-18 when engine coolant
temp. is below 93_C, 200_F.
2 driving cycle detection logic, continuous monitoring.
DTC CONFIRMATION PROCEDURE
1) Turn ignition switch OFF.
2) Clear DTC with ignition switch ON.
3) Warm up engine until radiator cooling fan starts to operate.
4) Check pending DTC in "ON BOARD TEST" or "PENDING DTC" mode and DTC in "DTC" mode.
Radiator cooling fan relay
To
ECM
Main
relay
D "B/R" or "BI" circuit open or short
D Radiator cooling fan relay malfunction
D ECM malfunction
Bl / R
Radiator cooling
Fan motor
POSSIBLE CAUSE