Nissan Qashqai (2007-2010). Manual — part 423

REFRIGERANT PRESSURE SENSOR

EC-1211

< COMPONENT DIAGNOSIS >

[MR20DE (WITHOUT EURO-OBD)]

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REFRIGERANT PRESSURE SENSOR

Description

INFOID:0000000001094318

The refrigerant pressure sensor is installed at the condenser of the air conditioner system. The sensor uses an
electrostatic volume pressure transducer to convert refrigerant pressure to voltage. The voltage signal is sent
to ECM, and ECM controls cooling fan system.

Component Function Check

INFOID:0000000001094319

1.

CHECK REFRIGERANT PRESSURE SENSOR OVERALL FUNCTION

1.

Start engine and warm it up to normal operating temperature.

2.

Turn A/C switch and blower fan switch ON.

3.

Check the voltage between ECM harness connector and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to

EC-1215, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000001094320

1.

CHECK GROUND CONNECTION

1.

Turn A/C switch and blower fan switch OFF.

2.

Stop engine.

3.

Turn ignition switch OFF.

4.

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 REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT

1.

Disconnect refrigerant pressure sensor harness connector.

2.

Turn ignition switch ON.

3.

Check the voltage between refrigerant pressure sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

PBIB2657E

ECM

Ground

Voltage

Connector

Terminal

F8

41

(Refrigerant pressure sensor signal)

Ground

1.0 - 4.0V

Refrigerant pressure sensor

Ground

Voltage

Connector

Terminal

E49

3

Ground

Approx. 5V

EC-1212

< COMPONENT DIAGNOSIS >

[MR20DE (WITHOUT EURO-OBD)]

REFRIGERANT PRESSURE SENSOR

3.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E6, F123
• Harness for open or short between ECM and refrigerant pressure sensor

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

4.

CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between refrigerant pressure sensor harness connector and ECM harness connec-
tor.

4.

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

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 5.

5.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E6, F123
• Harness for open or short between ECM and refrigerant pressure sensor

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

6.

CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Check the continuity between ECM harness connector and refrigerant pressure sensor harness connec-
tor.

2.

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

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> GO TO 7.

7.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E6, F123
• Harness for open or short between ECM and refrigerant pressure sensor

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

8.

CHECK INTERMITTENT INCIDENT

Refer to

GI-39, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace refrigerant pressure sensor.

NO

>> Repair or replace.

Refrigerant pressure sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

E49

1

F8

48

Existed

Refrigerant pressure sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

E49

2

F8

41

Existed

VSS

EC-1213

< COMPONENT DIAGNOSIS >

[MR20DE (WITHOUT EURO-OBD)]

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VSS

Description

INFOID:0000000001102137

The vehicle speed signal is sent to the combination meter from the “ABS actuator and electric unit (control
unit)” by CAN communication line. The combination meter then sends a signal to the ECM by CAN communi-
cation line.

Diagnosis Procedure

INFOID:0000000001102139

1.

INSPECTION START

Do you have CONSULT-III?

Do you have CONSULT-III?

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

PERFORM COMPONENT FUNCTION CHECK

1.

Turn ignition switch OFF.

2.

Lift up the vehicle.

3.

Start engine and let it idle.

4.

Select “VHCL SPEED SE” in “DATA MONITOR” mode with CONSULT-III.

5.

Select “VHCL SPEED SE” indication whe n rotating wheels with suitable gear position.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 3.

3.

CHECK DTC WITH “ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)”

Refer to @@@.
Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace.

4.

CHECK COMBINATION METER FUNCTION

Refer to @@@.

>> INSPECTION END

“VHCL SPEED SE” indication should
exceed 10 km/h (6 MPH).

EC-1214

< ECU DIAGNOSIS >

[MR20DE (WITHOUT EURO-OBD)]

ECM

ECU DIAGNOSIS

ECM

Reference Value

INFOID:0000000001094321

VALUES ON THE DIAGNOSIS TOOL

Remarks:

l

Specification data are reference values.

l

Specification data are output/input values which are detected or supplied by the ECM at the connector.

* Specification data may not be directly related to their components signals/values/operations.
I.e. Adjust ignition timing with a timing light before monitoring IGN TIMING, because the monitor may show the specification data in spite of the

ignition timing not being adjusted to the specification data. this IGN TIMING monitors the data calculated by the ECM according to the signals
input from the camshaft position sensor and other ignition timing related sensors.

Monitor Item

Condition

Values/Status

ENG SPEED

• Run engine and compare CONSULT-III value with the tachometer indication.

Almost the same speed as
the tachometer indication.

MAS A/F SE-B1

See

EC-1061, "Diagnosis Procedure"

.

B/FUEL SCHDL

See

EC-1061, "Diagnosis Procedure"

.

A/F ALPHA-B1

See

EC-1061, "Diagnosis Procedure"

.

COOLAN TEMP/S

• Engine: After warming up

More than 70

°

C (158

°

F)

HO2S1 (B1)

• Engine: After warming up

Maintaining engine speed at 2,000 rpm

0 - 0.3V

←→

Approx. 0.6 -

1.0V

HO2S2 (B1)

• Revving engine from idle up to 3,000 rpm quickly after the following conditions

are met.

- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at

idle for 1 minute under no load

0 - 0.3V

←→

Approx. 0.6 -

1.0V

HO2S2 MNTR (B1)

• Engine: After warming up

Maintaining engine speed at 2,000 rpm

LEAN

←→→

RICH

Change more than 5 times
during 10 seconds.

HO2S2 MNTR (B1)

• Revving engine from idle up to 3,000 rpm quickly after the following conditions

are met.

- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at

idle for 1 minute under no load

LEAN

←→

RICH

VHCL SPEED SE

• Turn drive wheels and compare CONSULT-III value with the speedometer in-

dication.

Almost the same speed as
speedometer indication

BATTERY VOLT

• Ignition switch: ON (Engine stopped)

11 - 14V

ACCEL SEN 1

• Ignition switch: ON

(Engine stopped)

Accelerator pedal: Fully released

0.5 - 1.0V

Accelerator pedal: Fully depressed

4.2 - 4.8V

ACCEL SEN 2*

• Ignition switch: ON

(Engine stopped)

Accelerator pedal: Fully released

0.5 - 1.0V

Accelerator pedal: Fully depressed

4.2 - 4.8V

THRL SEN 1-B1

• Ignition switch: ON

(Engine stopped)

• Shift lever: D (CVT), 1st (M/T)

Accelerator pedal: Fully released

More than 0.36V

Accelerator pedal: Fully depressed

Less than 4.75V

THRL SEN 2-B1*

• Ignition switch: ON

(Engine stopped)

• Shift lever: D (CVT), 1st (M/T)

Accelerator pedal: Fully released

More than 0.36V

Accelerator pedal: Fully depressed

Less than 4.75V

INT/A TEMP SE

• Ignition switch: ON

Indicates intake air tempera-
ture

START SIGNAL

• Ignition switch: ON

→

START

→

ON

OFF

→

ON

→

OFF

CLSD THL POS

• Ignition switch: ON

(Engine stopped)

Accelerator pedal: Fully released

ON

Accelerator pedal: Slightly depressed

OFF