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 MANUALSINFINITI2011M56 V8-5.6L (VK56VD)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMTESTING AND INSPECTIONELECTRICAL LOAD SIGNAL
2011 Infiniti M56 V8-5.6L (VK56VD)
Electrical Load Signal
2011 Infiniti M56 V8-5.6L (VK56VD)SECTION Electrical Load Signal
ELECTRICAL LOAD SIGNAL
Description
The electrical load signal (Rear window defogger switch signal, headlamp switch signal, blower fan switch signal, etc.) is transferred via the CAN communication line.
Component Function Check
1.CHECK REAR WINDOW DEFOGGER SWITCH FUNCTION
1. Turn ignition switch ON.
2. Select "DATA MONITOR" mode with CONSULT-III.
3. Select "LOAD SIGNAL" and check indication under the following conditions.
Is the inspection result normal?
YES - GO TO 2.
NO - Proceed to SEE Diagnosis Procedure.
2.CHECK LIGHTING SWITCH FUNCTION
Check "LOAD SIGNAL" indication under the following conditions.
Is the inspection result normal?
YES - GO TO 3.
NO - Proceed to SEE Diagnosis Procedure.
3.CHECK BLOWER FAN CONTROL SWITCH FUNCTION
Select "HEATER FAN SW" and check indication under the following conditions.
Is the inspection result normal?
YES - INSPECTION END
NO - Proceed to SEE Diagnosis Procedure.
Diagnosis Procedure
1.INSPECTION START
Confirm the malfunctioning circuit (rear window defogger, headlamp or blower fan). SEE Component Function Check.
Which circuit is related to the incident?
Rear window defogger-GO TO 2.
Headlamp-GO TO 3.
Heater fan-GO TO 4.
2.CHECK REAR WINDOW DEFOGGER SYSTEM
Initial Inspection and Diagnostic Overview.
- INSPECTION END
3.CHECK HEADLAMP SYSTEM
Exterior Lighting Xenon Type.
- INSPECTION END
4.CHECK BLOWER FAN CONTROL SYSTEM
Automatic Air Conditioner.
- INSPECTION END
RENDER: 1.0x
NO RELATED
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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.