Nissan Sentra manuals

Nissan Sentra Service Manual: ECU diagnosis information

TCM

Reference Value

CONSULT DATA MONITOR STANDARD VALUE

NOTE:





*: This monitor item does not use.


*: This monitor item does not use.

Terminal layout

Input/output signal standard


Input/output signal standard




Fail-Safe


Fail-Safe

Tcm has a fail-safe mode. The mode functions so that operation can be continued even if the signal circuit of the main electronically controlled input/output parts is damaged.

If the vehicle shows following behaviors including “poor acceleration”, a malfunction of the applicable system is detected by tcm and the vehicle may be in a fail-safe mode. At this time, check the dtc code and perform inspection and repair according to the malfunction diagnosis procedures.

Fail-safe function



Protection control


Protection control

The tcm becomes the protection control status temporarily to protect the safety when the safety of tcm and transmission is lost. It automatically returns to the normal status if the safety is secured.

The tcm has the following protection control.

CONTROL FOR WHEEL SPIN

Control When a wheel spin is detected, the engine output and gear ratio are limited and the line pressure is increased.

At the 1gr, the clutch pressure is increased.

Vehicle behavior in control If the accelerator is kept depressing during wheel spin, the engine revolution and vehicle speed are limited to a certain degree. From the 1gr, upshift to a certain gear ratio is only allowed.
Normal return condition Wheel spin convergence returns the control to the normal control.V

Control when fluid temperature is high

Control When the cvt fluid temperature is high, the gear shift permission maximum revolution and the maximum torque are reduced than usual to prevent increase of the oil temperature.
Vehicle behavior in control Power performance may be lowered, compared to normal control.
Normal return condition The control returns to the normal control when CVT fluid temperature is lowered.

Torque is reduced when driving with the reverse gear

Control Engine output is controlled according to a vehicle speed while reversing the vehicle.
Vehicle behavior in control Power performance may be lowered while reversing the vehicle.
Normal return condition Torque returns to normal by positioning the selector lever in a range other than “R” position.

Reverse prohibit control

Control The reverse brake is controlled to avoid becoming engaged when the selector lever is set in “r” position while driving in forward direction at more than the specified speed.
Vehicle behavior in control If the selector lever is put at “r” position when driving with the forward gear, the gear becomes neutral, not reverse.
Normal return condition The control returns to normal control when the vehicle is driven at low speeds. (The reverse brake becomes engaged.)

DTC Inspection Priority Chart

If multiple malfunction codes are detected at the same time, check each code according to the dtc check priority list below.


DTC Index


DTC Index

Note:


*1: These numbers are specified by sae j2012/iso 15031-6.


*1: These numbers are specified by sae j2012/iso 15031-6.

*2: The dtc number of the 1st trip is the same as the dtc number.

*3: Refer to tm-106, "diagnosis description : malfunction indicator lamp (mil)".

*4: Refer to tm-151, "description".

Diagnosis system (TCM)
DIAGNOSIS DESCRIPTION DIAGNOSIS DESCRIPTION : 1 Trip Detection Diagnosis and 2 Trip Detection Diagnosis NOTE: “Start the engine and turn OFF the ignition switch after warm-up.” This i ...

Wiring diagram
CVT Control system Wiring Diagram CVT Shift lock system Wiring Diagram ...

Other materials:

Turn signal lamp circuit
Description The bcm monitors inputs from the combination switch to determine when to activate the turn signals. The bcm outputs voltage direction to the left and right turn signals during turn signal operation or both during hazard warning operation. The bcm sends a turn signal indicator req ...

Roof side molding
Exploded view Roof side molding Roof side molding clip Roof panel Body side outer panel Adhesive tape Removal and installation REMOVAL ROOF SIDE MOLDING Release roof side molding rear side clip, using a suitable tool (A). Clip Front CAUTION: Apply protective tape ...

Trip computer
When the ignition switch is placed in the ON position, the modes of the trip computer can be selected by pressing the button on the steering wheel. The following modes can be selected: Trip A Trip B ECO Pedal Indicator Instant fuel economy Average fuel economy Average speed Dis ...

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