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 MANUALSINFINITI2008FX45 AWD V8-4.5L (VK45DE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSSNOW MODE SWITCH
2008 Infiniti FX45 AWD V8-4.5L (VK45DE)
Snow Mode Switch
2008 Infiniti FX45 AWD V8-4.5L (VK45DE)SECTION Snow Mode Switch
SNOW MODE SWITCH
Description
The snow mode switch signal is sent to the "unified meter and A/C amp." from the snow mode switch. The "unified meter and A/C amp." then sends the signal to the ECM by CAN communication line.
The snow mode is used for driving or starting the vehicle on snowy roads or slippery areas. If the snow mode is activated, the vehicle speed will not be accelerated immediately than your original pedal in due to avoid the vehicle slip. In other words, ECM controls the rapid engine torque change by controlling the electric throttle control actuator operating speed.
CONSULT-III Reference Value in Data Monitor Mode
Wiring Diagram
Diagrams: Other diagrams referred to by name within these diagrams can be found at Diagrams By Diagram Name. Diagrams By Diagram Name
Diagnosis Procedure
Component Inspection
SNOW MODE SWITCH
1. Check continuity between snow mode switch terminals 1 and 4 under the following conditions.
2. If NG, replace snow mode switch.
If OK, go to following step.
3. Check continuity between snow mode switch terminals 2 and 4 under the following conditions.
4. If NG, replace snow mode switch.
Description
The snow mode switch signal is sent to the "unified meter and A/C amp." from the snow mode switch. The "unified meter and A/C amp." then sends the signal to the ECM by CAN communication line.
The snow mode is used for driving or starting the vehicle on snowy roads or slippery areas. If the snow mode is activated, the vehicle speed will not be accelerated immediately than your original pedal in due to avoid the vehicle slip. In other words, ECM controls the rapid engine torque change by controlling the electric throttle control actuator operating speed.
CONSULT-III Reference Value in Data Monitor Mode
Wiring Diagram
EC-SNOWSW-01:
Diagrams: Other diagrams referred to by name within these diagrams can be found at Diagrams By Diagram Name. Diagrams By Diagram Name
Diagnosis Procedure
Step 1:
Step 1 (Continued)-6:
Step 6 (Continued)-10:
Component Inspection
SNOW MODE SWITCH
1. Check continuity between snow mode switch terminals 1 and 4 under the following conditions.
2. If NG, replace snow mode switch.
If OK, go to following step.
3. Check continuity between snow mode switch terminals 2 and 4 under the following conditions.
4. If NG, replace snow mode switch.
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.