Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2014 Nissan-Datsun Sentra SLFACTORY OEM SERVICE PROCEDURE
DTC Related Item
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.
| Fail safe mode | Vehicle behavior | |
|---|---|---|
| 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.
|
| 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. | |
| Device fix mode |
|
|
FAIL SAFE CHART
| Pattern | Fail safe mode | |
|---|---|---|
| A | Traveling control mode | Accelerator angle variation control |
| B | Engine output control | |
| C | Device fix mode | |
FAIL SAFE CHART
| x: Applicable -: Not applicable | ||||||
|---|---|---|---|---|---|---|
| DTC No. | Detected items | Vehicle behavior | ||||
| Pattern | Others | |||||
| A | B | C | ||||
| P0011 | Intake valve timing control | - | - | x | ECM activates the IVT intermediate lock control solenoid valve to bring the cam sprocket into an intermediate lock condition. | |
| P0075 | Intake valve timing control | - | - | x | ECM activates the IVT intermediate lock control solenoid valve to bring the cam sprocket into an intermediate lock condition. | |
| P0014 P0078 |
Exhaust valve timing control | - | - | x | - | |
| 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. |
|
| P0117 P0118 |
Engine coolant temperature sensor | x | x | - | - | |
| P0171 P0172 |
Fuel injection system | x | - | - | - | |
| P0196 P0197 P0198 |
Engine oil temperature sensor | - | - | - | Exhaust valve timing control does not function. | |
| P0300 P0301 P0302 P0303 P0304 |
Misfire | x | - | - | - | |
| P0500 | Vehicle speed sensor | x | - | - | - | |
| P0524 | Engine oil pressure | - | - | - |
|
|
| P0603 | ECM | x | x | - | - | |
| P0605 | ECM | x | x | - | - | |
| P0643 | Sensor power supply | - | - | - | ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring. | |
| P1078 | Exhaust valve timing control position sensor circuit | x | - | x | - | |
| P1650 P1651 |
Starter relay | x | x | - | ||
| P1805 | Brake switch | - | - | - | ECM controls the electric throttle control actuator by regulating the throttle opening to a small range. Therefore, acceleration will be poor. |
|
| Vehicle condition | Driving condition | |||||
| When engine is idling | Normal | |||||
| When accelerating | Poor acceleration | |||||
| P2004 | Intake manifold runner control valve | - | x | x | - | |
| P2100 P2103 |
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. | |
| 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. | |
| 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. | |
| P2119 | Electric throttle control actuator | x | x | - | - | |
| 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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Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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