Nissan Altima 2007-2012 Service Manual: Control system

System Diagram

System Description

The CVT senses vehicle operating conditions through various sensors. It always controls the optimum shift position and reduces shifting and lock-up shocks.

TCM FUNCTION

The function of the TCM is to: • Receive input signals sent from various switches and sensors.

• Determine required line pressure, shifting point, and lock-up operation.

• Send required output signals to the step motor and the respective solenoids.

*: Without manual mode.

INPUT/OUTPUT SIGNAL OF TCM

*1: Input by CAN communications.

*2: If these input and output signals are different, the TCM triggers the fail-safe function.

Component Parts Location - Coupe

1. Control device assembly

2. Accelerator pedal position sensor

3. CVT unit harness connector

4. Primary speed sensor

5. Secondary speed sensor

6. PNP switch

7. TCM

8. Battery

9. Shift position indicator Manual mode indicator

Component Parts Location - Sedan

1. Control device assembly

2. Accelerator pedal position sensor

3. CVT unit harness connector

4. Primary speed sensor

5. Secondary speed sensor

6. PNP switch

7. TCM

8. Battery

9. Shift position indicator Manual mode indicator

Component Description

TRANSAXLE ASSEMBLY

EXCEPT TRANSAXLE ASSEMBLY

    Hydraulic control system
    System Diagram System Description The hydraulic control mechanism consists of the oil pump directly driven by the engine, the hydraulic control valve that controls line pressure and transmiss ...

    Lock-up and select control system
    System Diagram System Description • The torque converter clutch piston in the torque converter is engaged to eliminate torque converter slip to increase power transmission efficiency. • ...

    Other materials:

    Maintenance requirements
    Your NISSAN has been designed to have minimum maintenance requirements with long service intervals to save you both time and money. However, some day-to-day and regular maintenance is essential to maintain your NISSAN’s good mechanical condition, as well as its emissions and engine perform ...

    Air bags, seat belts and child restraints
    1. Top tether strap anchor 2. Rear seat belts 3. Roof-mounted curtain side-impact supplemental air bag 4. Front seat-mounted side-impact supplemental air bag 5. Head restraints/headrests 6. Front seat belts 7. Side-impact pressure sensor (driver’s side shown; passenger’s side simil ...

    Brake precautions
    Vacuum assisted brakes The brake booster aids braking by using engine vacuum. If the engine stops, you can stop the vehicle by depressing the brake pedal. However, greater foot pressure on the brake pedal will be required to stop the vehicle and stopping distance will be longer. Using the b ...