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:
Rear view camera
Diagnosis Procedure
1.CHECK POWER SUPPLY CIRCUIT (REAR VIEW CAMERA SIDE)
Check voltage between rear view camera harness connector and
ground.
Is inspection result normal?
YES >> GO TO 4
NO >> GO TO 2
2.CHECK POWER SUPPLY CIRCUIT (CONTINUITY)
1. Turn ignition switch OFF.
2. ...
Air conditioning cut control
System Diagram
System Description
INPUT/OUTPUT SIGNAL CHART
*1: This signal is sent to the ECM via the CAN communication line.
*2: ECM determines the start signal status by the signals of engine speed and
battery voltage.
SYSTEM DESCRIPTION
This system improves engine operation when t ...
Doors
When the doors are locked using one of the
following methods, the doors can not be opened
using the inside or outside door handles. The
doors must be unlocked to open the doors.
WARNING
● Always have the doors locked while
driving. Along with the use of seat belts,
this provides greater ...