IDLE NEUTRAL CONTROL : System Description
SYSTEM DIAGRAM
DESCRIPTION
If a driver has no intention of starting the vehicle in D position, TCM operates the low brake solenoid valve and controls the oil pressure of the low brake to be low pressure. Therefore, the low brake is in the release (slip) status and the power transmission route of transaxle is the same status as the N position. In this way, the transaxle is in idling status and load to the engine can be reduced to improve fuel economy.
NOTE: Provides idle neutral control when stop/start operation is not performed.
Idle Neutral Control Start Condition
Idle neutral control is started when all of the following conditions are fulfilled. However, during idle neutral control, idle neutral control is stopped when any of the following conditions is not met or idle neutral control continues 30 seconds.
Driving environment : Flat road or road with mild gradient
Selector lever position : "D" position
Vehicle speed : 0 km/h (0 MPH)
Accelerator pedal position : 0.0/8
Brake pedal : Depressed
Engine speed : Idle speed
Turn signal lamp/hazard signal lamp : Not activated
NOTE: Stops or prohibits the idle neutral control when the TCM and ECM detect that the vehicle is in one of the following conditions.
Idle Neutral Control Resume Condition
When the idle neutral control finishes, if the vehicle is driven at more than the specified speed and the idle neutral control start conditions are satisfied, the idle neutral control starts again. If the vehicle has a malfunction, the idle neutral control does not start.
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Description
This is an on board diagnosis system which records diagnosis information related to the exhaust gases. It detects malfunctions related to sensors and actuators. The malfunctions are indicated by means of the malfunction indicator lamp (MIL) and are stored as DTC in the ECU memory. The diagnosis information can be checked using a diagnosis tool (GST: Generic Scan Tool).
Function of OBD
The GST is connected to the diagnosis connector on the vehicle and communicates with the on-board control units to perform diagnosis. The diagnosis connector is the same as for CONSULT. Refer to GI "Description".
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DIAGNOSIS DESCRIPTION ...
Emission control system warranty
Your NISSAN vehicle is covered by the following
emission warranties:
For USA
1. Emission Defects Warranty
2. Emissions Performance Warranty
Details of this warranty may be found with other
vehicle warranties in your Warranty Information
Booklet which comes with your NISSAN vehicle.
If you ...
P0507 ISC system
Description
The ECM controls the engine idle speed to a specified level through the fine
adjustment of the air, which is let
into the intake manifold, by operating the electric throttle control actuator.
The operating of the throttle valve is
varied to allow for optimum control of the engine ...