2012 Infiniti M37 BaseFACTORY OEM SERVICE PROCEDURE

Manual Mode

INPUT/OUTPUT SIGNAL CHART

Item Signal TCM function Actuator
Output speed sensor Vehicle speed Manual mode
  • 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(1)
Accelerator pedal position signal(1)
Combination meter Manual mode signal(1)
Non-manual mode signal(1)
Manual mode shift up signal(1)
Manual mode shift down signal(1)
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
  • The TCM receives the manual mode signal, non-manual mode signal, manual mode shift up signal, manual mode shift down signal, paddle shifter shift up signal* and paddle shifter shift down signal* from combination meter via CAN communication line. The TCM shifts shift pattern control to the manual mode based on these signals, and then shifts the A/T by operating each solenoid valve according to the shift operation of the driver.

*: With paddle shifter

NOTE: When paddle shifter is pulled and held for approximately 60 seconds, gear shift using paddle shifter becomes inoperative. "P1815" is displayed in "Self Diagnostic Results" of CONSULT. In this case, paddle shifter returns to normal status when ignition switch is turned OFF once and then ON again. Gear shift using paddle shifter becomes operative.
  • The TCM prohibits the manual mode while being in fail-safe mode due to an A/T malfunction, etc. Refer to "FAIL-SAFE ".

Manual Mode Information

The TCM transmits the manual mode shift refusal signal to the combination meter if the TCM refuses the transmission from the driving status of vehicle when the selector lever or paddle shifter shifts to "UP (+ side)" or "DOWN (- side)" side. The combination meter blinks shift indicator on the combination meter and sounds the buzzer to indicate the driver that the shifting is not performed when receiving this signal. However, the TCM does not transmit the manual mode shift refusal signal in the conditions as per the following.

  • When the selector lever or the paddle shifter shifts to "DOWN (- side)" side while driving in 1GR.
  • When the selector lever or the paddle shifter shifts to "UP (+ side)" side while driving in 7GR.
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.

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