Fail Safe: Description
WARNING: This page is about a different car, the 2017 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
When a DTC is detected, ECM executes a mode (in the Fail-safe mode) applicable to the DTC. The fail-safe mode has the preset traveling control mode (accelerator angle variation and engine output limit) and device fix mode.
| Fail safe mode | Vehicle behavior | Fail safe pattern | |
|---|---|---|---|
| Traveling control mode | Accelerator angle variation control | ECM controls the accelerator pedal depression speed to make it slower than actual speed. This causes a drop in accelerating performance and encourages the driver to repair malfunction.
NOTE:
ECM does not control the accelerator pedal releasing speed. |
A |
| Engine output control | ECM reduces the engine output, according to the rise in engine speed. This reduces the vehicle speed to encourage the driver to repair malfunction. Driving at 70 km/h (44 MPH) or more is possible.
NOTE:
This value is a reference value converted from engine power to vehicle speed. Actual power limitation value differs due to the malfunctioning part and driving condition. |
B | |
| Device fix mode |
|
C | |
| Combustion control mode | Stratified charge combustion control at starting | No stratified charge combustion at starting (cold start). | D |
| Idle speed control | Stops feedback control of idle speed and controls with specified speed. | E | |
| Recovery speed control at decelerating | Stops recovery speed control by the fuel cut at decelerating and controls with specified speed. | ||
| Ignition timing correction control | Partially controls ignition timing control. | F | |
| Retardation control | Controls ignition timing delay control in the intermediate water temperature range. | ||