Nissan X-Trail 32. Instruction — part 729
SYSTEM
EC-45
< SYSTEM DESCRIPTION >
[MR20DD]
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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), device fix
mode and combustion control mode.
Fail Safe Pattern
Fail Safe List
×
:Applicable —: Not applicable
Fail safe mode
Vehicle behavior
Traveling con-
trol mode
Accelerator an-
gle 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 refer-
ence position.
• The intake manifold runner control valve motor is turned OFF (intake manifold runner control
valve opens).
Combustion
control mode
Stratified charge
combustion
control at start-
ing
No stratified charge combustion at starting (cold start).
Idle speed con-
trol
Stops feedback control of idle speed and controls with specified speed.
Recovery speed
control at decel-
erating
Stops recovery speed control by the fuel cut at decelerating and controls with specified speed.
Idle neutral con-
trol
Stops idle neutral control.
Ignition timing
correction con-
trol
Partially controls ignition timing control.
Retardation
control
Controls ignition timing delay control in the intermediate water temperature range.
Pattern
Fail safe mode
A
Traveling control mode
Accelerator angle variation control
B
Engine output control
C
Device fix mode
D
Combustion control mode
Stratified charge combustion control at starting
E
• Idle speed control
• Recovery speed control at decelerating
• Idle neutral control
F
• Ignition timing correction control
• Retardation control
DTC No.
Detected items
Vehicle behavior
Pattern
Others
A
B
C
D
E
F
P0011
Intake valve timing control
—
—
×
—
—
—
—
P0014
Exhaust valve timing control
—
—
×
—
—
—
—
P0075
Intake valve timing control sole-
noid valve
—
—
×
—
—
—
—
P0078
Exhaust valve timing control so-
lenoid valve
—
—
×
—
—
—
—
EC-46
< SYSTEM DESCRIPTION >
[MR20DD]
SYSTEM
P0087
P0088
P0090
FRP control system
×
—
—
×
—
—
—
P0102
P0103
Mass air flow sensor circuit
×
×
×
×
×
×
—
P0117
P0118
Engine coolant temperature
sensor circuit
—
—
—
×
×
—
Engine speed will not rise more than
1,800rpm due to the fuel cut.
P0122
P0123
P0222
P0223
P2135
Throttle position sensor
—
—
—
—
—
—
The ECM controls the electric throttle con-
trol actuator in regulating the throttle open-
ing 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 nor-
mal condition. So, the acceleration will be
poor.
NOTE:
If throttle position sensor 1 and 2 malfunc-
tion at the same time conducts following
control.
• ECM stops the electric throttle control ac-
tuator control, throttle valve is maintained
at a fixed opening (approx. 5 degrees) by
the return spring.
P0171
P0172
Fuel injection system
×
—
—
×
×
—
—
P0190
FRP sensor
×
—
—
×
×
—
—
P0197
P0198
Engine oil temperature sensor
—
—
—
—
—
—
Intake and exhaust valve timing control
does not function.
P0201
P0202
P0203
P0204
Injector
×
—
—
×
—
—
—
P0300
Misfire
×
—
—
×
×
—
—
P0335
Crankshaft position sensor
—
—
×
—
—
—
—
P0340
Camshaft position sensor
—
—
×
—
—
—
—
P0365
Exhaust valve timing control po-
sition 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.
P0603
P0607
ECM
×
×
—
—
—
—
—
P0604
P0605
P0606
—
—
—
—
—
—
(Computing part of ECM does not operate
normally.)
ECM stops the electric throttle control actu-
ator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the re-
turn spring.
P062B
×
—
—
×
—
—
NOTE:
Fail-safe mode may not start depending on
malfunction type of ECM.
DTC No.
Detected items
Vehicle behavior
Pattern
Others
A
B
C
D
E
F
SYSTEM
EC-47
< SYSTEM DESCRIPTION >
[MR20DD]
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P0643
Sensor power supply
—
—
—
—
—
—
ECM stops the electric throttle control actu-
ator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the re-
turn spring.
P1197
Out of gas
—
—
—
—
—
—
Engine torque is limited.
P1217
Engine over temperature
—
—
—
—
—
—
Engine speed will not rise more than
1,800rpm due to the fuel cut.
P1805
Brake switch
—
—
—
—
—
—
ECM controls the electric throttle control ac-
tuator 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
P2008
Intake manifold runner control
valve
×
×
×
×
×
×
—
P2100
P2103
Throttle control motor relay
—
—
—
—
—
—
ECM stops the electric throttle control actu-
ator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the re-
turn spring.
P2101
Electric throttle control function
—
—
—
—
—
—
ECM stops the electric throttle control actu-
ator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the re-
turn spring.
P2118
Throttle control motor
—
—
—
—
—
—
ECM stops the electric throttle control actu-
ator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the re-
turn spring.
P2119
Electric throttle control actuator
×
×
—
—
—
—
ECM stops the electric throttle control actu-
ator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the re-
turn spring.
NOTE:
For pattern A and B refer to A and B of
P2119 DTC detection logic. (Refer to
For C of P2119 DTC detection logic ECM
behaves as above.
P2122
P2123
P2127
P2128
P2138
Accelerator pedal position sen-
sor
—
—
—
—
—
—
The ECM controls the electric throttle con-
trol actuator in regulating the throttle open-
ing 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 nor-
mal condition. Therefore, the acceleration
will be poor.
NOTE:
If accelerator pedal position sensor 1 and 2
malfunction at the same time conducts fol-
lowing control.
• ECM stops the electric throttle control ac-
tuator control, throttle valve is maintained
at a fixed opening (approx. 5 degrees) by
the return spring.
DTC No.
Detected items
Vehicle behavior
Pattern
Others
A
B
C
D
E
F
EC-48
< SYSTEM DESCRIPTION >
[MR20DD]
SYSTEM
ENGINE CONTROL SYSTEM : Circuit Diagram
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