Nissan Cube. Manual - part 385

EC-426

< DTC/CIRCUIT DIAGNOSIS >

[MR18DE]

REFRIGERANT PRESSURE SENSOR

NO

>> GO TO 3.

3.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors F1, E8
• 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 E8, F1
• 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 E8, F1
• 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-40, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace refrigerant pressure sensor. Refer to 

HA-41, "REFRIGERANT PRESSURE SENSOR :

Removal and Installation"

.

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-427

< ECU DIAGNOSIS INFORMATION >

[MR18DE]

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ECU DIAGNOSIS INFORMATION

ECM

Reference Value

INFOID:0000000009947577

VALUES ON THE DIAGNOSIS TOOL

NOTE:
The following table includes information (items) inapplicable to this vehicle. For information (items) applicable
to this vehicle, refer to CONSULT display items.

z

Numerical values in the following table are reference values.

z

These values are input/output values that ECM receives/transmits and may differ from actual operations.

Example:
The ignition timing shown by the timing light may differ from the ignition timing displayed on the data monitor.
This occurs because the timing light shows a value calculated by ECM according to signals received from the
cam shaft position sensor and other sensors related to ignition timing.
For outlines of following items, refer to 

EC-112, "CONSULT Function"

.

Monitor Item

Condition

Values/Status

ENG SPEED

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

Almost the same speed as 

the tachometer indication.

MAS A/F SE-B1

See 

EC-122, "Diagnosis Procedure"

.

B/FUEL SCHDL

See 

EC-122, "Diagnosis Procedure"

.

A/F ALPHA-B1

See 

EC-122, "Diagnosis Procedure"

.

COOLANT TEMP/S

• Engine: After warming up

More than 70

°

C (158F)

A/F SEN1 (B1)

• Engine: After warming up

Maintaining engine speed at 2,000 rpm

Fluctuates around 2.2 V

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 - 0.3 V 

←→

 Approx. 0.6 - 

1.0 V

HO2S2 MNTR (B1)

LEAN 

←→

 RICH

VHCL SPEED SE

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

cation.

Almost the same speed as 

speedometer indication

BATTERY VOLT

• Ignition switch: ON (Engine stopped)

11 - 14 V

ACCEL SEN 1

• Ignition switch: ON

(Engine stopped)

Accelerator pedal: Fully released

0.6 - 0.9 V

Accelerator pedal: Fully depressed

4.0 - 4.8 V

ACCEL SEN 2*

1

• Ignition switch: ON

(Engine stopped)

Accelerator pedal: Fully released

0.6 - 0.9 V

Accelerator pedal: Fully depressed

3.9 - 4.8 V

TP SEN 1-B1

• Ignition switch: ON

(Engine stopped)

• Selector lever position: D (CVT) 

or 1st (M/T)

Accelerator pedal: Fully released

More than 0.36 V

Accelerator pedal: Fully depressed

Less than 4.75 V

TP SEN 2-B1*

1

• Ignition switch: ON

(Engine stopped)

• Selector lever position: D (CVT) 

or 1st (M/T)

Accelerator pedal: Fully released

More than 0.36 V

Accelerator pedal: Fully depressed

Less than 4.75 V

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

AIR COND SIG

• Engine: After warming up, idle the 

engine

Air conditioner switch: OFF

OFF

Air conditioner switch: ON
(Compressor operates.)

ON

EC-428

< ECU DIAGNOSIS INFORMATION >

[MR18DE]

ECM

P/N POSI SW

• Ignition switch: ON

Selector lever position: P or N (CVT) or 
Neutral (M/T)

ON

Selector lever position: 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
• Selector lever position: P or N 

(CVT) or Neutral (M/T) 

• 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
• Selector lever position: P or N 

(CVT) or Neutral (M/T) 

• Air conditioner switch: OFF
• No  load

Idle

8 - 18

°

BTDC

2,000 rpm

25 - 45

°

BTDC

CAL/LD VALUE

• Engine: After warming up
• Selector lever position: P or N 

(CVT) or Neutral (M/T)

• Air conditioner switch: OFF
• No  load

Idle

10 - 35%

2,500 rpm

10 - 35%

MASS AIRFLOW

• Engine: After warming up
• Selector lever position: P or N 

(CVT) or Neutral (M/T) 

• Air conditioner switch: OFF
• No  load

Idle

1.0 - 4.0 g/s

2,500 rpm

2.0 - 10.0 g/s

PURG VOL C/V

• Engine: After warming up
• Selector lever position: P or N 

(CVT) or Neutral (M/T)

• Air conditioner switch: OFF
• No  load

Idle

0%

2,000 rpm

0 - 50%

INT/V TIM (B1)

• Engine: After warming up
• Selector lever position: P or N 

(CVT) or Neutral (M/T) 

• 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
• Selector lever position: P or N 

(CVT) or Neutral (M/T) 

• 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 second after turning ignition switch: ON
• Engine running or cranking

ON

• Except above

OFF

Monitor Item

Condition

Values/Status

ECM

EC-429

< ECU DIAGNOSIS INFORMATION >

[MR18DE]

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THRTL RELAY

• Ignition switch: ON

ON

COOLING FAN

• Engine: After warning up, idle the 

engine

• Air conditioner switch: OFF

Engine coolant temperature is 98

°

C 

(208

°

F) or less

OFF

Engine coolant temperature is between 
98

°

C (208

°

F) and 99

°

C (210

°

F)

LOW

Engine coolant temperature is 100

°

C 

(212

°

F) or more

HIGH

HO2S2 HTR (B1)

• Engine speed: Below 3,600 rpm after the following conditions are met.
- Engine: After warming up
- Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and at 

idle for 1 minute under no load

ON

VEHICLE SPEED

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

cation.

Almost the same speed as 

the speedometer indication

IDL A/V LEARN

• Engine: running

Idle air volume learning has not been per-
formed yet.

YET

Idle air volume learning has already been 
performed successfully.

CMPLT

TRVL AFTER MIL

• Ignition switch: ON

Vehicle has traveled after MIL has turned 
ON.

0 - 65,535 km

(0 - 40,723 miles)

A/F S1 HTR (B1)

• Engine: After warming up, idle the engine

(More than 140 seconds after starting engine)

4 - 100%

AC PRESS SEN

• Engine: Idle
• Both A/C switch and blower fan switch: ON (Compressor operates)

1.0 - 4.0 V

EVAP SYS PRES

• Ignition switch: ON

Approx 1.8 - 4.8 V

VENT CONT/V

• Ignition switch: ON

OFF

I/P PULLY SPD

• Vehicle speed: More than 20 km/h (12MPH)

Almost the same speed as 

the tachometer indication.

A/F ADJ-B1

• Engine: Running

-0.330 - 0.330

FUEL T/TMP SE

• Ignition switch: ON

Indicates fuel tank tempera-

ture.

INT/A TEMP SE

• Ignition switch: ON

Indicates intake air tempera-

ture.

FUEL LEVEL SE

• Ignition switch: ON

Depending on fuel level of 

fuel tank.

BAT CUR SEN

• Engine speed: Idle

• Battery: Fuel charged*

2

• Selector lever: P or N (CVT), Neutral (M/T)
• Air conditioner switch: OFF
• No  load

Approx 2,600 - 3,500 mV

ALT DUTY

• Engine: Idle

0 - 80%

ALT DUTY SIG

• Power generation voltage variable control: Operating

ON

• Power generation voltage variable control: Not operating

OFF

VHCL SPEED SE

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

cation.

Almost the same speed as 

the speedometer indication.

SET VHCL SPD

• Engine: Running

ASCD: Operating

The preset vehicle speed is 

displayed.

MAIN SW

• Ignition switch: ON

MAIN switch: pressed

ON

MAIN switch: Released

OFF

CANCEL SW

• Ignition switch: ON

CANCEL switch: pressed

ON

CANCEL switch: Released

OFF

Monitor Item

Condition

Values/Status