Nissan Cube. Instruction — part 391
EC-450
< ECU DIAGNOSIS INFORMATION >
[MR18DE]
ECM
JRBWC5361GB
ECM
EC-451
< ECU DIAGNOSIS INFORMATION >
[MR18DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
JRBWC5362GB
EC-452
< ECU DIAGNOSIS INFORMATION >
[MR18DE]
ECM
Fail Safe
INFOID:0000000009947579
NON DTC RELATED ITEM
JRBWC5363GB
ECM
EC-453
< ECU DIAGNOSIS INFORMATION >
[MR18DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
DTC RELATED ITEM
Detected items
Engine operating condition in
fail-safe mode
Remarks
Malfunction indicator
lamp circuit
Engine speed will not rise
more than 2,500 rpm due to
the fuel cut
When there is an open circuit on MIL circuit, the ECM cannot warn the driver by
lighting up MIL when there is malfunction on engine control system.
Therefore, when electrical controlled throttle and part of ECM related diagnoses
are continuously detected as NG for 5 trips, ECM warns the driver that engine
control system malfunctions and MIL circuit is open by means of operating fail-
safe function.
The fail-safe function also operates when above diagnoses except MIL circuit
are detected and demands the driver to repair the malfunction.
DTC No.
Detected items
Engine operating condition in fail-safe mode
P0011
Intake valve timing control
The signal is not energized to the intake valve timing control solenoid valve and the valve
control does not function.
P0101
P0102
P0103
Mass air flow sensor circuit
Engine speed will not rise more than 2,400 rpm due to the fuel cut.
P0117
P0118
Engine coolant tempera-
ture sensor circuit
Engine coolant temperature will be determined by ECM based on the following condition.
CONSULT displays the engine coolant temperature decided by ECM.
Condition
Engine coolant temperature decided
(CONSULT display)
Just as ignition switch is turned ON
or START
40
°
C (104
°
F)
More than approx. 4 minutes after
engine starting
80
°
C (176
°
F)
Except as shown above
40 - 80
°
C (104 - 176
°
F)
(Depends on the time)
When the fail-safe system for engine coolant temperature sensor is activated, the cooling
fan operates while engine is running.
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.
P0500
Vehicle speed sensor
The cooling fan operates (highest) while engine is running.
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.
P0605
ECM
(When ECM calculation function is malfunctioning:)
ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
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
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.
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