2012 Infiniti M35hFACTORY OEM SERVICE PROCEDURE

Drive Mode Selector

INPUT/OUTPUT SIGNAL CHART

Item Signal TCM function Actuator
Input speed sensor 1, 2 Input speed Drive mode selector
  • High and low reverse clutch solenoid valve
  • Direct clutch solenoid Value
  • Input clutch solenoid valve
  • Low brake solenoid valve
  • 2346 brake solenoid valve
  • Front brake solenoid valve
  • Clutch 1 solenoid valve
  • Line pressure solenoid valve
  • Anti-interlock solenoid valve
Output speed sensor Vehicle speed
A/T fluid temperature sensor ATF temperature
Traction motor inverter Motor speed signal(1)
HPCM Engine start request signal(1)
Accelerator pedal position signal(1)
Closed throttle position signal(1)
Input torque signal(1)
Drive mode select signal(1)
Shift schedule signal(1)
ABS actuator and electric unit (control unit) Side G sensor signal(1)
BCM Stop lamp switch signal(1)
A/C auto amp. STANDARD mode signal(1)
ECO mode signal(1)
SPORT mode signal(1)
SNOW mode signal(1)
(1) This signal is transmitted via CAN communication line.
  • TCM receives STANDARD mode signal, ECO mode signal, SPORT mode signal, or SNOW mode signal from A/C auto amp. via CAN communication.
  • TCM transmits recognized mode and gear shift line select result to HPCM via CAN communication (by drive mode select signal and shift schedule signal).
  • Drive mode may not actually be shifted because of CAN communication malfunction or other causes, although display on combination meter may indicate that shifting of drive mode is complete by operation of drive mode select switch.
  • Priority is given to manual mode, when manual mode is selected by operation of selector lever while driving in any other drive mode status.

ECO mode

  • Driving characteristic is controlled (for decreasing needless acceleration and deceleration and reducing energy consumption), so that driving that improves operational fuel efficiency is assisted.
  • For gear shift vehicle speed, refer to "VEHICLE SPEED AT WHICH GEAR SHIFTING OCCURSΒ ".

SPORT mode

  • This mode uses a shift schedule (gear shift line) that mainly utilizes the high engine speed zone and improves the driving control characteristic and response. This assists driving that is similar to driving a sports car.

ASC (Adaptive Shift Control)

  • When driving on an up/down slope

    ASC judges up/down slope according to engine torque data transmitted from the HPCM and vehicle speed. Fixing at 4GR, 5GR or 6GR on an up-slope prevents shift hunting and controls the vehicle to gain optimum driving force.

  • When driving on a curve

TCM receives the side G sensor signal from the ABS actuator and electric unit (control unit). It locks to 4GR, 5GR or 6GR position in moderate cornering or to 3GR position in sharp cornering based on this signal. This prevents any upshift and kickdown during cornering, maintaining smooth vehicle travel.

Fig 1: Adaptive Shift Control - System Diagram (Driving On Up/Down Slope And Curve)
G07013428Courtesy of NISSAN NORTH AMERICA, INC.

Fail-Safe

If a malfunction occurs in CAN communication between TCM and A/C auto amp., driving mode is maintained for approximately 30 seconds to the mode that is applied when the malfunction occurs. The mode then returns to STANDARD mode when accelerator pedal is released.

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:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.