Nissan Qashqai (2007-2010). Manual - part 319

P0172 FUEL INJECTION SYSTEM FUNCTION

EC-795

< COMPONENT DIAGNOSIS >

[MR20DE (WITH EURO-OBD)]

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6.

Also check harness for short to power.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair open circuit or short to ground or short to power in harness or connectors.

4.

CHECK FUEL PRESSURE

1.

Release fuel pressure to zero. Refer to 

EC-978, "Inspection"

.

2.

Install fuel pressure gauge and check fuel pressure. Refer to 

EC-978, "Inspection"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 5.

5.

 DETECT MALFUNCTIONING PART

Check fuel hoses and fuel tubes for clogging.

Is the inspection result normal?

YES

>> Replace “fuel filter and fuel pump assembly”.

NO

>> Repair or replace

6.

CHECK MASS AIR FLOW SENSOR

With CONSULT-III

1.

Install all removed parts.

2.

Check “MASS AIR FLOW” in “DATA MONITOR” mode with CONSULT-III.

With GST

1.

Install all removed parts.

2.

Check mass air flow sensor signal in “Service $01” with GST.

Is the measurement value within the specification?

YES

>> GO TO 7.

NO

>> Check connectors for rusted terminals or loose connections in the mass air flow sensor circuit or

grounds. Refer to 

EC-746, "DTC Logic"

.

7.

CHECK FUNCTION OF FUEL INJECTOR

With CONSULT-III

1.

Start engine.

2.

Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT-III.

3.

Make sure that each circuit produces a momentary engine speed drop.

Without CONSULT-III

1.

Let engine idle.

At idling: Approximately 350 kPa (3.57 kg/cm

2

, 51 psi)

1.0 - 4.0 g·m/sec:

at idling

4.0 - 10.0 g·m/sec:

at 2,500 rpm

1.0 - 4.0 g·m/sec:

at idling

4.0 - 10.0 g·m/sec:

at 2,500 rpm

EC-796

< COMPONENT DIAGNOSIS >

[MR20DE (WITH EURO-OBD)]

P0172 FUEL INJECTION SYSTEM FUNCTION

2.

Listen to each fuel injector operating sound.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Perform trouble diagnosis for FUEL INJECTOR, refer to

EC-923, "Component Function Check"

.

8.

CHECK FUELINJECTOR

1.

Remove fuel injector assembly. Refer to 

EM-155, "Removal and Installation"

.

Keep fuel hose and all fuel injectors connected to fuel tube.

2.

Confirm that the engine is cooled down and there are no fire hazards near the vehicle.

3.

Disconnect all fuel injector harness connectors.

4.

Disconnect all ignition coil harness connectors.

5.

Prepare pans or saucers under each fuel injectors.

6.

Crank engine for about 3 seconds.
Make sure fuel does not drip from fuel injector.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Replace the fuel injectors from which fuel is dripping. Always replace O-ring with new one. 

9.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-39, "Intermittent Incident"

.

>> INSPECTION END

Clicking noise should be heard.

PBIB3332E

P0222, P0223 TP SENSOR

EC-797

< COMPONENT DIAGNOSIS >

[MR20DE (WITH EURO-OBD)]

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P0222, P0223 TP SENSOR

Description

INFOID:0000000001089369

Electric throttle control actuator consists of throttle control motor,
throttle position sensor, etc. The throttle position sensor responds to
the throttle valve movement. 
The throttle position sensor has two sensors. These sensors are a
kind of potentiometers which transform the throttle valve position into
output voltage, and emit the voltage signal to the ECM. In addition,
these sensors detect the opening and closing speed of the throttle
valve and feed the voltage signals to the ECM. The ECM judges the
current opening angle of the throttle valve from these signals and the
ECM controls the throttle control motor to make the throttle valve
opening angle properly in response to driving condition.

DTC Logic

INFOID:0000000001089370

DTC DETECTION LOGIC

NOTE:
If DTC P0222 or P0223 is displayed with DTC P1229, first perform the trouble diagnosis for DTC P1229.
Refer to 

EC-878, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10V at idle.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start engine and let it idle for 1 second.

2.

Check DTC.

Is DTC detected?

YES

>> Go to 

EC-799, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000001089371

1.

CHECK GROUND CONNECTION

1.

Turn ignition switch OFF.

2.

Check ground connection E21. Refer to Ground Inspection in 

GI-41, "Circuit Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace ground connection.

2.

CHECK THROTTLE POSITION SENSOR 1 POWER SUPPLY CIRCUIT

1.

Disconnect electric throttle control actuator harness connector.

2.

Turn ignition switch ON.

PBIB0145E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0222

Throttle position sensor 
1 circuit low input

An excessively low voltage from the TP sensor 
1 is sent to ECM.

• Harness or connectors

(TP sensor 1 circuit is open or shorted.)

• Electric throttle control actuator

(TP sensor 1)

P0223

Throttle position sensor 
1 circuit high input

An excessively high voltage from the TP sensor 
1 is sent to ECM.

EC-798

< COMPONENT DIAGNOSIS >

[MR20DE (WITH EURO-OBD)]

P0222, P0223 TP SENSOR

3.

Check the voltage between electric throttle control actuator harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair open circuit or short to ground or short to power in harness or connectors.

3.

CHECK THROTTLE POSITION SENSOR 1 GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.

4.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair open circuit or short to ground or short to power in harness or connectors.

4.

CHECK THROTTLE POSITION SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.

2.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair open circuit or short to ground or short to power in harness or connectors.

5.

CHECK THROTTLE POSITION SENSOR

Refer to 

EC-800, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> GO TO 6.

6.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1.

Replace electric throttle control actuator.

2.

Go to 

EC-801, "Special Repair Requirement"

.

>> INSPECTION END

7.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-39, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000001089372

Electric throttle control actuator

Ground

Voltage

Connector

Terminal

F29

1

Ground

Approx. 5V

Electric throttle control actuator

ECM

Continuity

Connector

Terminal

Connector

Terminal

F29

4

F8

36

Existed

Electric throttle control actuator

ECM

Continuity

Connector

Terminal

Connector

Terminal

F29

2

F8

33

Existed