Radiator cooling fan relay
To
ECM
Main
relay
Relay
box
“RDTR”
(Radiator fan)
Radiator cooling
Fan motor
ENGINE GENERAL INFORMATION AND DIAGNOSIS (SFI FOR G13) 6-1-85
DTC P0480 RADIATOR COOLING FAN CONTROL SYSTEM MALFUNCTION
CIRCUIT DESCRIPTION
DTC DETECTING CONDITION POSSIBLE CAUSE
D Low voltage at terminal C02-18 when engine coolant
temp. is 92_C, 197_F below.
: 2 driving cycle detection logic, continuous monitoring.
D “B/W” or “P/G” circuit open or short
D Radiator cooling fan relay malfunction
D ECM (PCM) malfunction
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.
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