C60" (P0480) Cooling Fan Relay Circuit Malfunction - Suzuki GSX-R750 Service Manual

"C60" (P0480) COOLING FAN RELAY CIRCUIT MALFUNCTION

DETECTED CONDITION
Cooling fan relay signal is not input to ECM.
ECM
FAR
INSPECTION
Step 1
1) Turn the ignition switch OFF.
2) Lift and support the fuel tank. (5-3)
3) Check the cooling fan relay coupler for loose or poor contacts.
If OK, then inspection the cooling fan relay. (7-7)
Is the cooling fan relay OK?
• O/W and O/R wire open or shorted to ground,
or poor c connection
• If wire and connection are OK, intermittent trou-
ble or faulty ECM.
YES
• Recheck each terminal and wire harness for
open circuit and poor connection.
• Replace the ECM with a known good one, and
inspect it again.
NO Replace the cooling fan relay with a new one.

When using the multi-circuit tester, do not storongly
touch the terminal of the ECM coupler with a needle
pointed tester probe to prevent the terminal damage
or terminal bend.
4) After repairing the trouble, clear the DTC using SDS tool.
(4-27)
Cooling fan
relay
O/R O/W
To Side-stand
switch
Cooling fan
motor
POSSIBLE CAUSE
• Cooling fan relay circuit open or short
• ECM malfunction
Engine stop Side-stand
switch relay
1
1
FI SYSTEM DIAGNOSIS
Ignition
switch
ECM couplers (Harness side)
(Black) (Gray)
4-103