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 DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 13 (LIGHTING SYSTEMS)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B2575CIRCUIT/SYSTEM TESTING
2013 Suzuki SX4 Crossover, Automatic CVT Trans
Circuit/System Testing
2013 Suzuki SX4 Crossover, Automatic CVT TransSECTION Circuit/System Testing
WARNING: This page is about a different car, the 2007 Suzuki XL7. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition ON, automatic head lights OFF, verify the scan tool LOW BEAM PCB relay command parameter displays ON with the head lamp switch in the ON position.
- If the scan tool displays OFF, test the head lamp switch portion of the multifunction switch head lamps ON signal circuit terminal C1 pin 2 and head lamp switch ground circuit terminal C1 pin 1 for a short to voltage or an open/high resistance. If the circuits test normal, replace the multifunction switch.
- Ignition OFF, disconnect the LOW BEAM PCB relay at the C2 pin 18 terminal (low beam relay control circuit coil side) of the Underhood Fuseblock.
- Verify that a test lamp illuminates between the underhood fuseblock B+ circuit on the coil side and switch side of the relay when connected to ground.
- If the test lamp does not illuminate, test the underhood fuseblock B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the B+ circuit fuse is open, test the left and right low beam supply voltage circuits for a short to ground. If the circuits test normal replace the appropriate head lamp assembly.
- Disconnect the harness connector at an inoperative head lamp assembly.
- Test for less than 1.0 Ξ© of resistance between the inoperative head lamp ground circuit terminal 2 and ground.
- If greater than 1.0 Ξ©, test the ground circuit for an open/high resistance.
- Connect the harness connector at the head lamp.
- Connect a 30-amp fused jumper wire between the B+ circuit terminal and the appropriate head lamp supply voltage circuit terminal of the low beam head lamp. Verify the head lamps illuminate.
- If the head lamps do not illuminate, test the left and right head lamp supply voltage circuits for an open/high resistance. If the circuits test normal, replace the inoperative head lamp assembly.
- Connect a test lamp between the underhood fuseblock B+ circuit terminal of the relay and the Low Beam relay control terminal C2 pin 18 circuit terminal.
- Command the LOW BEAM PCB relay ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
- If the test lamp is always OFF, test the low beam relay control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.
- If all circuits test normal, replace the underhood fuseblock.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.