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.
2011 Suzuki SX4 2WD L4-2.0LFACTORY OEM SERVICE PROCEDURE
BCM Power Circuit and Ground Circuit Check
BCM Power Circuit and Ground Circuit Check
Wiring Diagram
Troubleshooting
1. Fuse check
Turn ignition switch to OFF position.
Check circuit fuses for condition.
Are circuit fuses in good condition?
YES
Go to Step 2.
NO
Replace fuse and check for short circuit to ground.
2. Power supply circuit check
Disconnect connectors from BCM.
Check for proper connection to BCM connector at terminal "G06-13".
If OK, then measure voltage between "G06-13" terminal of BCM connector and vehicle body ground.
Is voltage 10 - 14 V?
YES
Go to Step 3.
NO
Repair power supply circuit.
3. Power supply circuit check
Check for proper connection to BCM connector at terminals "G04-1" and "G04-2".
If OK, turn ignition switch to ON position.
Measure voltage between following terminals.
- Between "G04-1" terminal of BCM connector and vehicle body ground
- Between "G04-2" terminal of BCM connector and vehicle body ground
Is each voltage 10 - 14 V?
YES
Go to Step 4.
NO
Repair power supply circuit.
4. Ground circuit check
Turn ignition switch to OFF position.
Check for proper connection to BCM connector at terminals "G06-1" and "G04-12".
If OK, then measure resistance between following terminals.
- Between "G06-1" terminal of BCM connector and vehicle body ground
- Between "G04-12" terminal of BCM connector and vehicle body ground
Is each resistance 2 ohms or less?
YES
BCM power supply circuit and ground circuit are in good condition.
NO
Repair ground circuit.
Factory Service Tools
Use the Manual With the Right Hardware
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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.