Nissan Cube. Manual - 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.