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.

2012 Infiniti FX50FACTORY OEM SERVICE PROCEDURE

Input/Output Signal Chart

Sensor

Input signal to TCM

TCM function

Actuator

Output speed sensor

Vehicle speed

Shift pattern control

High and low reverse clutch solenoid valve
Direct clutch solenoid valve
Input clutch solenoid valve
Low brake solenoid valve
2346 brake solenoid valve
Front brake solenoid valve
Torque converter clutch solenoid valve
Line pressure solenoid valve
Anti-interlock solenoid valve

A/T fluid temperature sensor

ATF temperature

ECM

Engine speed signal^*

Accelerator pedal position signal^*

Unified meter and A/C amp.

Manual mode signal^*

Non-manual mode signal^*

Manual mode shift up signal^*

Manual mode shift down signal^*

Paddle shifter shift up signal⁽¹⁾, ⁽²⁾

Paddle shifter shift down signal⁽¹⁾, ⁽²⁾

⁽¹⁾	This signal is transmitted via CAN communication line.

⁽²⁾	With paddle shifter

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.