Fail Safe
Description
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.
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Fail safe mode |
Vehicle behavior |
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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.
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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. |
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Device fix mode |
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Fail Safe Pattern
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Pattern |
Fail safe mode |
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A |
Traveling control mode |
Accelerator angle variation control |
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B |
Engine output control |
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C |
Device fix mode |
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Fail Safe List
x:Applicable - : Not applicable
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DTC No. |
Detected items |
Vehicle behavior |
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Pattern |
Others |
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A |
B |
C |
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P0011 P0012 P0016 P0075 |
Intake valve timing control |
- |
- |
x |
- |
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P0014 P0015 P0017 P0078 |
Exhaust valve timing control |
- |
- |
x |
- |
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P0101 P0102 P0103 |
Mass air flow sensor circuit |
x |
x |
x |
- |
|
|
P0122 P0123 P0222 P0223 P2135 |
Throttle position sensor |
- |
- |
- |
The ECM controls the electric throttle control actuator in regulating the throttle opening in order for the idle position to be within +10 degrees. The ECM regulates the opening speed of the throttle valve to be slower than the normal condition. So, the acceleration will be poor. |
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P0117 P0118 |
Engine coolant temperature sensor |
x |
x |
- |
- |
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P0171 P0172 |
Fuel injection system |
x |
- |
- |
- |
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P0197 P0198 |
Engine oil temperature sensor |
- |
- |
- |
Exhaust valve timing control does not function. |
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P0300 P0301 P0302 P0303 P0304 |
Misfire |
x |
- |
- |
- |
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P0500 |
Vehicle speed sensor |
x |
- |
- |
- |
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P0524 |
Engine oil pressure |
- |
- |
- |
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P0603 |
ECM |
- |
- |
- |
- |
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|
- |
x |
- |
ASCD operation may be deactivated. |
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P0604 |
ECM |
x |
- |
x |
ASCD operation may be deactivated. |
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P0605 P060B |
ECM |
- |
- |
- |
- |
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|
x |
- |
x |
ASCD operation may be deactivated. |
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P0606 |
ECM |
- |
- |
- |
ASCD operation may be deactivated. |
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|
x |
- |
x |
ASCD operation may be deactivated. |
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P0607 |
ECM |
- |
- |
- |
- |
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|
- |
x |
- |
- |
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P060A |
ECM |
x |
- |
x |
- |
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|
x |
x |
x |
ASCD operation may be deactivated. |
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P0643 |
ECM |
x |
- |
x |
- |
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P1078 |
Exhaust valve timing control position sensor circuit |
x |
- |
x |
- |
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P1568 |
ICC COMMAND VALUE |
- |
- |
- |
ICC cancelled |
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P1650 P1651 |
Starter relay |
x |
x |
- |
- |
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P1575 P1805 |
Brake switch |
- |
- |
- |
ECM controls the electric throttle control actuator by regulating the throttle opening to a small range. Therefore, acceleration will be poor. |
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Vehicle condition |
Driving condition |
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When engine is idling |
Normal |
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When accelerating |
Poor acceleration |
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P2100 |
Throttle control motor relay |
- |
- |
- |
ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring. |
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P2101 |
Electric throttle control function |
- |
- |
- |
ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring. |
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P2118 |
Throttle control motor |
- |
- |
- |
ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring. |
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P2119 |
Electric throttle control actuator |
x |
x |
- |
- |
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P2122 P2123 P2127 P2128 P2138 |
Accelerator pedal position sensor |
- |
- |
- |
The ECM controls the electric throttle control actuator in regulating the throttle opening in order for the idle position to be within +10 degrees. The ECM regulates the opening speed of the throttle valve to be slower than the normal condition. So, the acceleration will be poor. |
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