Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSSUZUKI2013SX4 CROSSOVER, AUTOMATIC CVT TRANSREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE GENERAL INFORMATION & DIAGNOSISDIAGNOSTIC INFORMATION AND PROCEDURESDTC P0480: FAN 1 CONTROL CIRCUITDTC TROUBLESHOOTING

2013 Suzuki SX4 Crossover, Automatic CVT Trans

DTC Troubleshooting

2013 Suzuki SX4 Crossover, Automatic CVT TransSECTION DTC Troubleshooting

DIAGNOSTIC INFORMATION AND PROCEDURES REFERENCE CHART

Step	Action	YES	NO
1	Was "Engine and Emission Control System Check" performed?	Go to Step 2.	Go to ENGINE AND EMISSION CONTROL SYSTEM CHECK .
2	Wire harness check Turn ignition switch to OFF position. Check for proper terminal connection to radiator cooling fan relay (No. 1, No. 2 or No. 3) and ECM connectors. If connections are OK, recheck DTC. Refer to DTC CHECK . Is DTC P0480 or P0481 detected again?	Go to Step 3.	Intermittent trouble.
3	Circuit fuse check Check "RDTR" fuse (1) in fuse box No. 1 with ignition switch turned OFF. Is "RDTR" fuse in good condition?	Go to Step 4.	Check for short in circuits connected to this fuse.
4	Radiator cooling fan drive circuit voltage check Turn ignition switch to OFF position. Disconnect connectors from ECM. Turn ignition switch ON position. Check that radiator cooling fan relay (No. 1, No. 2 or No. 3) drive circuit voltage is battery voltage between ECM connector and vehicle body ground. Is it in good condition?	Substitute a known-good ECM and recheck DTC. Refer to DTC CHECK .	Go to Step 5.
5	Radiator cooling fan drive circuit voltage check Turn ignition switch to OFF position. Remove radiator cooling fan relay No. 1 (1), No. 2 (2) or No. 3 (3). Turn ignition switch ON position. Check that radiator cooling fan relay (No. 1, No. 2 or No. 3) power supply voltage is battery voltage between radiator cooling fan relay (No. 1, No. 2 or No. 3) connector and vehicle body ground. Is it in good condition?	Go to Step 6.	Repair or replace power supply circuit of radiator cooling fan relay (No. 1, No. 2 or No. 3).
6	Radiator cooling fan relay check Check radiator cooling fan relay No. 1, No. 2 or No. 3 for operation. Refer to RADIATOR COOLING FAN RELAY INSPECTION . Is it in good condition?	Repair or replace drive circuit of radiator cooling fan relay (No. 1, No. 2 or No. 3). If circuit is OK, substitute a known-good ECM and recheck DTC. Refer to DTC CHECK .	Replace radiator cooling fan relay No. 1, No. 2 or No. 3.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.