Idle Neutral Control
| Item | Signal | TCM function | Actuator | ||||
|---|---|---|---|---|---|---|---|
| Each sensor, switch and control unit => TCM | TCM => ECM | ECM => TCM | |||||
| Input speed sensor 1, 2 | Input speed | N idle instruction signal (Standby signal)(1) | N idle instruction signal (Start signal)(1) | Idle neutral control | Low brake solenoid valve | ||
| Output speed sensor | Output shaft revolution | ||||||
| A/T fluid temperature sensor | ATF temperature | ||||||
| Transmission range switch | Selector lever position | ||||||
| ECM | Engine speed signal(1) | ||||||
| Accelerator pedal position signal(1) | |||||||
| Throttle position signal(1) | |||||||
| BCM | Stop lamp switch signal(1) | ||||||
| Turn indicator signal(1) | |||||||
| ABS actuator electric unit (control unit) | Pressure sensor signal(1) | ||||||
| Decel G sensor signal(1) | |||||||
| Combination meter | Vehicle speed signal(1) | ||||||
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The TCM activates low brake solenoid valve and controls the low brake oil pressure to the low pressure level if the driver does not intend to start the vehicle while the vehicle is being stopped in the "D" position. Therefore, the low brake is in the release (slip) status and the power transmission route of A/T is the same status as the "N" position. This can decrease the engine load and improves the fuel economy because the drive force of engine is not transmitted to the output shaft of A/T.
Idle Neutral Control Start Condition
Idle neutral control starts when all of the following conditions are satisfied. However, the control ends when any one of the following conditions becomes insufficient during idle neutral control.
Driving location: Level road and gentle slope
Selector lever position: "D" position
Vehicle speed: 0 km/h (0 MPH)
Accelerator pedal opening: 0.0/8
Brake pedal: Depress
Engine speed: Idle speed
Infiniti drive mode selector: Other than SNOW mode
Turn signal lamp and hazard warning lamp: OFF
- Engine cooling water temperature and A/T fluid temperature are below or above a prescribed temperature.
- A/T malfunction occurs.
- DTC is detected.
- Fail-safe mode activates.
- Idle neutral control is performed continuously for a certain period of time.
Idle Neutral Control Resume Condition
Idle neutral control can be resumed when its start condition is fulfilled after any of the following operations is performed (unless a malfunction occurs in the vehicle).
- After driving at more than a prescribed speed.
- When idle neutral control start conditions are fulfilled for a certain period of time.