Nissan Qashqai (2007-2010). Manual - part 199

REFRIGERANT PRESSURE SENSOR

EC-315

< COMPONENT DIAGNOSIS >

[HR16DE (WITH EURO-OBD)]

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REFRIGERANT PRESSURE SENSOR

Description

INFOID:0000000001056526

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:0000000001056527

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-316, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000001056528

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-316

< COMPONENT DIAGNOSIS >

[HR16DE (WITH EURO-OBD)]

REFRIGERANT PRESSURE SENSOR

3.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors F123, E6
• 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 F123, E6
• 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 F123, E6
• 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

ECM

EC-317

< ECU DIAGNOSIS >

[HR16DE (WITH EURO-OBD)]

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ECU DIAGNOSIS

ECM

Reference Value

INFOID:0000000001056529

VALUES ON THE DIAGNOSIS TOOL

Remarks:
• Specification data are reference values.
• 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-109, "Diagnosis Procedure"

.

B/FUEL SCHDL

See 

EC-109, "Diagnosis Procedure"

.

A/F ALPHA-B1

See 

EC-109, "Diagnosis Procedure"

.

COOLAN TEMP/S

• Engine: After warming up

More than 70

°

C (158F)

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

HO2S1 MNTR (B1)

• Engine: After warming up

Maintaining engine speed at 2,000 rpm

LEAN 

←→

 RICH

Changes 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

0.6 - 0.9V

Accelerator pedal: Fully depressed

4.0 - 4.8V

ACCEL SEN 2

• Ignition switch: ON

(Engine stopped)

Accelerator pedal: Fully released

0.6 - 0.9V

Accelerator pedal: Fully depressed

3.9 - 4.8V

THRL SEN 1-B1

• Ignition switch: ON

(Engine stopped)

• Shift lever: 1st

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:1st

Accelerator pedal: Fully released

More than 0.36V

Accelerator pedal: Fully depressed

Less than 4.75V

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

EC-318

< ECU DIAGNOSIS >

[HR16DE (WITH EURO-OBD)]

ECM

AIR COND SIG

• Engine: After warming up, idle the 

engine

Air conditioner switch: OFF

OFF

Air conditioner switch: ON
(Compressor operates.)

ON

P/N POSI SW

• Ignition switch: ON

Shift lever: Neutral

ON

Shift lever: Except above

OFF

PW/ST SIGNAL

• Engine: After warming up, idle the 

engine

Steering wheel: Not being turned

OFF

Steering wheel: Being turned

ON

LOAD SIGNAL

• Ignition switch: ON

Rear window defogger switch: ON
and/or Lighting switch: 2nd position

ON

Rear window defogger switch and lighting 
switch: OFF

OFF

IGNITION SW

• Ignition switch: ON 

→

 OFF 

→

 ON

ON 

→

 OFF 

→

 ON

HEATER FAN SW

• Engine: After warming up, idle the 

engine

Heater fan switch: ON

ON

Heater fan switch: OFF

OFF

BRAKE SW

• Ignition switch: ON

Brake pedal: Fully released

OFF

Brake pedal: Slightly depressed

ON

INJ PULSE-B1

• Engine: After warming up
• Shift lever: Neutral 
• Air conditioner switch: OFF
• No  load

Idle

2.0 - 3.0 msec

2,000 rpm

1.9 - 2.9 msec

IGN TIMING

• Engine: After warming up
• Shift lever: Neutral 
• Air conditioner switch: OFF
• No  load

Idle

10

°

 - 20

°

 BTDC

2,000 rpm

25

°

 - 45

°

 BTDC

CAL/ALD VALUE

• Engine: After warming up
• Shift lever: Neutral
• Air conditioner switch: OFF
• No  load

Idle

10% - 35%

2,500 rpm

10% - 35%

MASS AIRFLOW

• Engine: After warming up
• Shift lever: Neutral 
• Air conditioner switch: OFF
• No  load

Idle

1.0 - 4.0 g·m/s

2,500 rpm

2.0 - 10.0 g·m/s

PURG VOL C/V

• Engine: After warming up
• Shift lever: Neutral
• Air conditioner switch: OFF
• No  load

Idle

0%

2,000 rpm

0% - 50%

INT/V TIM (B1)

• Engine: After warming up
• Shift lever: Neutral 
• Air conditioner switch: OFF
• No  load

Idle

−

5

°

 - 5

°

CA

2,000 rpm

Approx. 0

°

 - 40

°

CA

INT/V SOL (B1)

• Engine: After warming up
• Shift lever: Neutral 
• Air conditioner switch: OFF
• No  load

Idle

0% - 2%

2,000 rpm

Approx. 0%  - 90%

AIR COND RLY

• Engine: After warming up, idle the 

engine

Air conditioner switch: OFF

OFF

Air conditioner switch: ON
(Compressor operates)

ON

FUEL PUMP RLY

• For 1 seconds after turning ignition switch: ON
• Engine running or cranking

ON

• Except above

OFF

THRTL RELAY

• Ignition switch: ON

ON

Monitor Item

Condition

Values/Status