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Home >> Infiniti >> 2017 >> QX60 Hybrid, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Introduction) (Hybrid) >> System Description >> System >> Engine Control System >> FAILSAFE >> DTC Related Item (Engine Control System)
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DTC Related Item (Engine Control System)

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
  • This mode fixes the IVT control solenoid valve and the EVT control solenoid valve in the reference position.
  • The intake manifold runner control valve motor is turned OFF (intake manifold runner control valve opens).

FAIL SAFE PATTERN 

Pattern Fail safe mode
A Traveling control mode Accelerator angle variation control
B Engine output control
C Device fix mode
D Supercharging stop mode Supercharger bypass valve control is stopped and becomes the fully open condition.

FAIL SAFE LIST 

: Applicable : Not applicable

DTC No. Detected items Vehicle behavior
Pattern Others
A B C D
P0011 Intake valve timing control - - * - 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 - - * - -
P0039 Supercharger bypass valve * * * * -
P0087
P0088
P0090
Fuel rail pressure control system * - - - -
P0101
P0102
P0103
Mass air flow sensor circuit * * * - -
P0116
P0117
P0118
Engine coolant temperature sensor * * - - -
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.
P0171
P0172
Fuel injection system * - - - -
P0190 Fuel rail pressure sensor * - - - -
P0197
P0198
Engine oil temperature sensor - - - - Exhaust valve timing control does not function.
P0201
P0202
P0203
P0204
Injector * - - - -
P0235
P0237
P0238
Supercharger boost sensor * * * * -
P0300
P0301
P0302
P0303
P0304
Misfire * - - - -
P0335 Crankshaft position sensor - - * - -
P0340 Camshaft position sensor - - * - -
P0500 Vehicle speed sensor * - - - -
P0524 Engine oil pressure * - - -
  • ECM illuminates engine oil pressure warning lamp on the combination meter.
  • Engine speed will not rise more than 4, 000RPM due to the fuel cut.
  • Fail-safe is canceled when ignition switch OFF → ON.
P052A
P052B
Intake valve timing intermediate lock control - - * - -
P0603 ECM - - - - -
- * - - ASCD operation may be deactivated.
P0604 ECM * - * - ASCD operation may be deactivated.
P0605
P060B
ECM - - - - -
* - * - ASCD operation may be deactivated.
P0606 ECM - - - - ASCD operation may be deactivated.
* - * - ASCD operation may be deactivated.
P0607 ECM - - - - -
- * - - -
P060A ECM * - * - -
* * * - ASCD operation may be deactivated.
P0643 ECM * - * - -
P1033
P1034
P1035
P1044
P1045
Supercharger bypass valve position sensor * * * * -
P1078 Exhaust valve timing control position sensor circuit * - * - -
P1217 Engine over temperature * * - - -
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 - * * - -
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 - * -   -
P2261 Supercharger bypass valve * * * - -