Nissan Qashqai (2007-2010). Manual — part 359

ECM

EC-955

< ECU DIAGNOSIS >

[MR20DE (WITH EURO-OBD)]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

JCBWA0199GB

EC-956

< ECU DIAGNOSIS >

[MR20DE (WITH EURO-OBD)]

ECM

Fail Safe

INFOID:0000000000936973

NON DTC RELATED ITEM

JCBWA0200GB

ECM

EC-957

< ECU DIAGNOSIS >

[MR20DE (WITH EURO-OBD)]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

DTC RELATED ITEM

Engine operating condi-

tion in fail-safe mode

Detected items

Remarks

Reference

page

Engine speed will not
rise more than 2,500 rpm
due to the fuel cut

Malfunction indicator
circuit

When there is an open circuit on MI circuit, the ECM cannot warn the
driver by lighting up MI 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 MI circuit is open by
means of operating fail-safe function.
The fail-safe function also operates when above diagnoses except MI
circuit are detected and demands the driver to repair the malfunction.

EC-934

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.

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 time after turning
ignition switch ON or START.
CONSULT-III displays the engine coolant temperature decided by ECM.

Condition

Engine coolant temperature decided

(CONSULT-III display)

Just as ignition switch is turned ON
or START

40

°

C (104

°

F)

More than approx. 4 minutes after
ignition ON or START

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

When the fail-safe system for vehicle speed sensor is activated, the cooling fan operates
(Highest) while engine is running.

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.
ECM deactivates ASCD operation.

P1121

Electric throttle control ac-
tuator

(When electric throttle control actuator does not function properly due to the return spring
malfunction:)
ECM controls the electric throttle actuator by regulating the throttle opening around the
idle position. The engine speed will not rise more than 2,000 rpm.

(When throttle valve opening angle in fail-safe mode is not in specified range:)
ECM controls the electric throttle control actuator by regulating the throttle opening to 20
degrees or less.

(When ECM detects the throttle valve is stuck open:)
While the vehicle is driving, it slows down gradually by fuel cut. After the vehicle stops, the
engine stalls.
The engine can restart in N or P (CVT), Neutral (M/T) position, and engine speed will not
exceed 1,000 rpm or more.

P1122

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.

EC-958

< ECU DIAGNOSIS >

[MR20DE (WITH EURO-OBD)]

ECM

DTC Inspection Priority Chart

INFOID:0000000000936974

If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.

P1124
P1126

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.

P1128

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.

P1229

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.

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

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.

DTC No.

Detected items

Engine operating condition in fail-safe mode

Priority

Detected items (DTC)

1

• U1001 CAN communication line
• U1010 CAN communication
• P0102 P0103 Mass air flow sensor
• P0112 P0113 P0127 Intake air temperature sensor
• P0117 P0118 P0125 Engine coolant temperature sensor
• P0122 P0123 P0222 P0223 P1225 P1226 P2135 Throttle position sensor
• P0327 P0328 Knock sensor
• P0335 Crankshaft position sensor (POS)
• P0340 Camshaft position sensor (PHASE)
• P0500 Vehicle speed sensor
• P0605 ECM
• P0705 P0850 Park/neutral position (PNP) switch
• P1229 sensor power supply
• P1610 P1611 P1612 P1615 NATS
• P1706 Park/Neutral position (PNP) switch
• P2122 P2123 P2127 P2128 P2138 Accelerator pedal position sensor