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.
2008 Infiniti M45 BaseFACTORY OEM SERVICE PROCEDURE
Operation Table Of BCM and Combination Switches
WARNING: This page is about a different car, the 2008 Infiniti FX45 and 2008 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.
BCM reads operation status of combination switch using combinations shown in table below.
OPERATION CHART OF BCM AND COMBINATION SWITCHES
| COMB SW OUTPUT 1 →; | COMB SW OUTPUT 2 →; | COMB SW OUTPUT 3 →; | COMB SW OUTPUT 4 →; | COMB SW OUTPUT 5 | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| ON | OFF | ON | OFF | ON | OFF | ON | OFF | ON | OFF | |
| COMB SW INPUT 1 | - | - | FR WIPER HI ON | FR WIPER HI OFF | INT VOLUME 1 ON | INT VOLUME 1 OFF | RR WIPER INT ON | RR WIPER INT OFF | INT VOLUME 2 ON | INT VOLUME 2 OFF |
| COMB SW INPUT 2 | FR WASHER ON | FR WASHER OFF | - | - | RR WASHER ON | RR WASHER OFF | INT VOLUME 3 ON | INT VOLUME 3 OFF | RR WIPER ON | RR WIPER OFF |
| COMB SW INPUT 3 | FR WIPER LOW ON | FR WIPER LOW OFF | FR WIPER INT ON | FR WIPER INT OFF | - | - | AUTO LIGHT ON | AUTO LIGHT OFF | - | - |
| COMB SW INPUT 4 | TURN LH ON | TURN LH OFF | PASSING ON | PASSING OFF | HEADLAMP 2 ON | HEADLAMP 2 OFF | - | - | FR FOG ON | FR FOG OFF |
| COMB SW INPUT 5 | TURN RH ON | TURN RH OFF | HEADLAMP 1 ON | HEADLAMP 1 OFF | HI BEAM ON | HI BEAM OFF | LIGHTING SW (1st) ON | LIGHTING SW (1st) OFF | - | - |
NOTE:
Headlamp system has a dual switch.
Factory Service Tools
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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.