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Home >> Infiniti >> 2019 >> QX50 Essential, FWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (4 Of 6) >> ECM >> Reference Value >> Values On The Diagnosis Tool
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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.
  • Numerical values in the following table are reference values.
  • 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 camshaft position sensor and other sensors related to ignition timing.

  • For outlines of following items, refer to CONSULT Function .

Monitor Item

Condition

Values/Status

COOLANT TEMP/S

Engine: After warming up

More than 70 deg.C

VHCL SPEED SE

Turn drive wheels and compare CONSULT value with the speedometer indication.

Almost the same speed as speedometer indication

BATTERY VOLT

Ignition switch: ON (Engine stopped)

11 - 14 V

INT/A TEMP SE

Engine: After warming up

Indicates intake air temperature

TURBO BST SEN

  • Engine speed: Idle
  • Selector lever: D
  • Fuel: Premium gasoline
  • The accelerator pedal is depressed to a half stroke position or more.
  • The readings of boost in the multi-function meter are the same as the ambient pressure or more.
  • Engine speed: More than 3, 000 rpm

3.07 - 3.15 V

  • Engine speed: Idle
  • Selector lever: D
  • Fuel: Regular gasoline
  • The accelerator pedal is depressed to a half stroke position or more.
  • The readings of boost in the multi-function meter are the same as the ambient pressure or more.
  • Engine speed: More than 3, 000 rpm

3.07 - 3.15 V

PURG VOL C/V

  • Engine: After warming up
  • Selector lever: P or N position
  • Air conditioner switch: OFF
  • No load

Idle

(Accelerator pedal: Not depressed even slightly, after engine starting)

0 %

2, 000 rpm

1 - 90 %

FUEL T/TMP SE

  • Ignition switch: ON

Indicates fuel tank temperature

FUEL LEVEL SE

  • Ignition switch: ON

Depending on fuel level of fuel tank

EVAP SYS PRES

  • Ignition switch: ON

Approx. 1.8 - 4.8 V

CAL/LD VALUE

  • Engine: After warming up
  • Selector lever: P or N position
  • Air conditioner switch: OFF
  • No load

Idle

5 - 35 %

2, 500 rpm

5 - 35 %

HO2S2 (B1)

  • 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.

Revving engine from idle up to 3, 000 rpm quickly

0 - 0.3 V<--> 0.6 - 1.0 V

LEAN<--> RICH

ENG OIL TEMP

Engine: After warming up

Indicates engine oil temperature

A/F ALPHA-B1

See Description .

MAP SENSOR

  • Engine: After warming up
  • Selector lever: P or N
  • Air conditioner switch: OFF
  • No load

Idle

Approx. 1.60 V

2, 000 rpm

Approx. 0.86 V

A/F S1 HTR (B1)

Engine: After warming up, idle the engine

(More than 140 seconds after starting engine)

4 - 100%

TC/SC SPEED B1

  • Engine: After warming up
  • Selector lever: P or N
  • Air conditioner switch: OFF
  • No load

3, 200 rpm

15, 000 - 30, 000 rpm

ATOM PRES SEN 2

  • This item is displayed but is not applicable to this model

Idle

4.2 V

2, 000 rpm

4.2 V

EXH/V TIM B1

  • Engine: After warming up
  • Selector lever: P or N position
  • Air conditioner switch: OFF
  • No load

Idle

-5 - 5 deg.CA

Around 2, 500 rpm while the engine speed is rising

0 - 30 deg.CA

W/GATE V CLSD LEARN B2

Learning is incomplete. There is no memory of the full close position voltage in the ECM.

INCMP

Learning is complete. Full close position voltage is memory in the ECM.

CMPLT

W/GATE V CLSD LEARN B1

Learning is incomplete. There is no memory of the full close position voltage in the ECM.

INCMP

Learning is complete. Full close position voltage is memory in the ECM.

CMPLT

W/G ACTUATOR POSITION B1

  • Engine: After warming up
  • Selector lever: P or N
  • Air conditioner switch: OFF
  • No load

Idle

Approx. 0.0149 m

2, 000 rpm

Approx. 0.0150 m

RADIATOR COOLANT TEMP

Engine: Running

Indicates radicates coolant temperature

FAN DUTY

  • Engine: Running

0 - 100%

FUEL PUMP DUTY

  • Engine: After warming up
  • Selector lever: P or N
  • Air conditioner switch: OFF
  • No load

Idle

60 - 70%

BAT TEMP SEN

Engine: After warming up

Approx. 1.90 V

THRTL STK CNT B1

NOTE: This item is displayed but are not applicable to this model.

--

ENG SPEED

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

Almost the same speed as the tachometer indication.

TRVL AFTER MIL

Ignition switch: ON

0 - 65, 535 km

B/FUEL SCHDL

See Description .

MASS AIRFLOW

  • Engine: After warming up
  • Selector lever: P or N position
  • Air conditioner switch: OFF
  • No load

Idle

1.6 - 3.2 g/s

2, 500 rpm

4.6 - 9.4 g/s

FUEL PRES SEN

  • Engine: After warming up
  • Selector lever: P or N position
  • Air conditioner switch: OFF
  • No load

Idle

Approx. 5.87 MPa

2, 000 rpm

Approx. 4.43 MPa

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

4.0 - 4.8 V

TP SEN 1-B1

  • Ignition switch: ON (Engine stopped)
  • Selector lever: D position

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: D position

Accelerator pedal: Fully released

More than 0.36 V

Accelerator pedal: Fully depressed

Less than 4.75 V

FUEL INJ B1

Ignition switch: ON

0.0 msec

I/P PULLY SPD

  • Connect the tachometer.
  • Start the engine and compare CONSULT value with the tachometer indication.

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

Almost the same speed as the tachometer indication

VEHICLE SPEED

Turn drive wheels and compare CONSULT value with the speedometer indication.

Almost the same speed as the speedometer indication

TUMBLE POS SEN

Ignition switch: ON

Approx. 4.390 V

Engine: After warming up

Idle

Approx. 0.835 V

AC PRESS SEN

  • Engine: Idle
  • Both air conditioner switch and blower fan switch: ON (Compressor operates)

1.0 - 4.0 V

A/F SEN1 (B1)

Engine: After warming up

Maintaining engine speed at 2, 000 rpm

Fluctuates around 2.2 V

VHCL SPEED SE

Turn drive wheels and compare CONSULT value with the speedometer indication.

Almost the same speed as speedometer indication

VTC DTY EX B1

  • Engine: After warming up
  • Selector lever: P or N position
  • Air conditioner switch: OFF
  • No load

Idle

0 %

When revving engine up to 2, 000 rpm quickly

Approx. 0 - 90 %

A/F ADJ-B1

Engine: Idle

-0.450 - 0.330

INT/V TIM(B1)

  • Engine: After warming up
  • Selector lever: P or N position
  • Air conditioner switch: OFF
  • No load

Idle

-5 - 5 deg.CA

2, 000 rpm

Approx. 0 - 20 deg.CA

H/P FUEL PUMP DEG

  • Engine: After warming up
  • Selector lever: P or N position
  • Air conditioner switch: OFF
  • No load

Idle

255 - 275 deg

2, 000 rpm

255 - 275 deg

FUEL PRES SEN V

  • Engine: After warming up
  • Selector lever: P or N position
  • Air conditioner switch: OFF
  • No load

Idle

0.820 - 1.160 V

When revving engine up to 4, 000 rpm quickly

0.820 - 2.900 V

EOP SENSOR

  • Engine oil temperature: 80 deg.C
  • Selector lever: P or N position
  • Air conditioner switch: OFF
  • No load

Idle

Approx. 1.655 V

2, 000 rpm

Approx. 1.740 V

ECM TEMP 1

  • Engine: At cooling
  • Ignition switch: Right after ON

Indicates the ambient temperature.

ECM TEMP 2

  • Engine: At cooling
  • Ignition switch: Right after ON

Indicates the ambient temperature.

MASS AIR FLOW SENSOR (Hz) B1

See Description .

A/F-S ATMSPHRC CRCT B1

Engine: After warming up, idle the engine

Varies depending on vehicle environment.

A/F-S ATMSPHRC CRCT UP B1

Engine: Running

Varies depending on the number of updates.

W/G ACTUATOR POSI SEN B1

Engine: After warming up

Idle

Approx. 4.060 V

2, 000 rpm

Approx. 4.065 V

ENGINE COOLANT B/V POSI

  • Ignition switch: ON
  • Cold condition

Approx. 197.9 deg

Engine: Idle

Engine coolant temperature: 64 deg.C (148 deg.F)

Approx. 63 deg

Engine coolant temperature: 75 deg.C (167 deg.F)

Approx. 99 deg

Engine coolant temperature: 86-100 deg.C (187- 212 deg.F)

Approx. 163 deg

TOTAL DISTNC-OCS RST 1

Ignition switch: ON

Varies depending on vehicle environment.

0 - 655, 350 km

(0 - 407, 234 miles)

TOTAL DISTNC-OCS RST 2

Ignition switch: ON

Varies depending on vehicle environment.

0 - 655, 350 km

(0 - 407, 234 miles)

TOTAL DISTNC-OCS RST 3

Ignition switch: ON

Varies depending on vehicle environment.

0 - 655, 350 km

(0 - 407, 234 miles)

DETERIORTN VL-OCS RST 1

Ignition switch: ON

Varies depending on vehicle environment.

0 - 655.35

DETERIORTN VL-OCS RST 2

Ignition switch: ON

Varies depending on vehicle environment.

0 - 655.35

DETERIORTN VL-OCS RST 3

Ignition switch: ON

Varies depending on vehicle environment.

0 - 655.35

TOTAL DISTNC-OCS WRN 1

Ignition switch: ON

Varies depending on vehicle environment.

0 - 655, 350 km

(0 - 407, 234 miles)

TOTAL DISTNC-OCS WRN 2

Ignition switch: ON

Varies depending on vehicle environment.

0 - 655, 350 km

(0 - 407, 234 miles)

TOTAL DISTNC-OCS WRN 3

Ignition switch: ON

Varies depending on vehicle environment.

0 - 655, 350 km

(0 - 407, 234 miles)

DETERIORIN VL-OCS WRN 1

Ignition switch: ON

Varies depending on vehicle environment.

0 - 655.35

DETERIORIN VL-OCS WRN 2

Ignition switch: ON

Varies depending on vehicle environment.

0 - 655.35

DETERIORIN VL-OCS WRN 3

Ignition switch: ON

Varies depending on vehicle environment.

0 - 655.35

CURRENT DETERIORANT VAL

Ignition switch: ON

Varies depending on vehicle environment.

0 - 655.35

Engine basis parts value 1

NOTE: This item is displayed but are not applicable to this model.

--

Engine basis parts value 2

NOTE: This item is displayed but are not applicable to this model.

--

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

AIR COND SIG

Engine: After warming up, idle the engine

Air conditioner switch: OFF

Off

Air conditioner switch: ON

(Compressor operates)

On

PW/ST SIGNAL

Engine: After warming up, idle the engine

Steering wheel: Not being turned

Off

Steering wheel: Being turned

On

P/N POSI SW

Ignition switch: ON

Selector lever: P or N position

On

Selector lever: Except above position

Off

START SIGNAL

Ignition switch: ON -> START -> ON

Off -> On -> Off

CLSD THL POS

Ignition switch: ON (Engine stopped)

Accelerator pedal: Fully released

On

Brake pedal: Slightly depressed

Off

HO2S2 MNTR(B1)

  • 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.

Revving engine from idle up to 3, 000 rpm quickly

LEAN<--> RICH

IGNITION SW

Ignition switch: ON -> OFF -> ON

On -> Off -> On

HEATER FAN SW

Engine: After warming up, idle the engine

Blower fan switch: ON

On

Blower fan switch: OFF

Off

IDL A/V LEARN

  • Engine: After warming up
  • Air conditioner switch: OFF
  • No load
  • Throttle valve closed position learning: Completed

Idle air volume learning has already been performed successfully.

CMPLT

Idle air volume learning has not been performed yet.

YET

BRAKE SW

Ignition switch: ON

Brake pedal: Fully released OFF

Off

Brake pedal: depressed

On

COMBUSTION

NOTE: This item is displayed but are not applicable to this model.

--

SWRL CONT S/V *2

  • Engine: After warming up
  • Selector lever: P or N position
  • Air conditioner switch: OFF
  • No load

Idle

On

4, 000 rpm

Off

AIR COND RLY

Engine: After warming up, idle the engine

A/C switch: OFF

Off

A/C switch: ON

(Compressor operates)

On

FUEL PUMP RLY

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

On

Except above

Off

FPCM

Ignition switch: OFF

Off

  • For 1 seconds after turning ignition switch: ON
  • Engine: Idle speed

Low

  • Engine: Cranking
  • Engine coolant temperature: More than 10 deg.C (50 deg.)
  • Engine: Above 4000 rpm

Mid

Engine: Cranking

Hi

VENT CONT/V

Ignition switch: ON

Off

THRTL RELAY

Ignition switch: ON

On

HO2S2 HTR(B1)

Ignition switch: ON

Off

DIST SW

Ignition switch: ON

DISTANCE switch: Pressed

On

DISTANCE switch: Released

Off

BRAKE SW2

(Stop lamp switch)

Ignition switch: ON

Brake pedal: Fully released

Off

Brake pedal: Depressed

On

BRAKE SW1

(Brake pedal position switch)

Ignition switch: ON

Brake pedal: Fully released

On

Brake pedal: Depressed

Off

SET SW

Ignition switch: ON

SET - switch: Pressed

On

SET - switch: Released

Off

RESUME/ACC SW

Ignition switch: ON

RES + switch: Pressed

On

RES + switch: Released

Off

CANCEL SW

Ignition switch: ON

CANCEL switch: Pressed

On

CANCEL switch: Released

Off

MAIN SW

Ignition switch: ON

ASCD/ICC MAIN switch: Pressed

On

ASCD/ICC MAIN switch: Released

Off

CRUISE LAMP

Ignition switch: ON

ASCD switch: Pressed at the 1st time -> at the 2nd time

On -> Off

ALT DUTY SIG

  • Power generation voltage variable control: Operating

On

  • Power generation voltage variable control: Not operating

Off

HO2 S2 DIAG1 (B1)

DTC P0139 self-diagnosis (delayed response) is incomplete.

INCMP

DTC P0139 self-diagnosis (delayed response) is complete.

CMPLT

HO2 S2 DIAG2 (B1)

DTC P0139 self-diagnosis (slow response) is incomplete.

INCMP

DTC P0139 self-diagnosis (slow response) is complete.

CMPLT

EVAP LEAK DIAG

Ignition switch: ON

Depending on condition of EVAP leak diagnosis

EVAP DIAG READY

Ignition switch: ON

Depending on ready condition of EVAP leak diagnosis

SYSTEM 1 DIAGNOSIS A B1

DTC P219A self-diagnosis is incomplete.

INCMP

DTC P219A self-diagnosis is complete.

CMPLT

A/F SEN1 DIAG1(B1)

DTC P015A and P015B self-diagnosis incomplete.

INCMP

DTC P015A and P015B self-diagnosis is complete.

CMPLT

A/F SEN1 DIAG2 (B1)

DTC P014C and P014D self-diagnosis incomplete.

INCMP

DTC P014C and P014D self-diagnosis is complete.

CMPLT

SYSTEM 1 DIAGNOSIS B B1

DTC P219A self-diagnosis is on standby.

ABSENT

DTC P219A self-diagnosis is under diagnosis.

PRSENT

A/F IMBALNC DIAG-CPS STAT

The vehicle condition is not within the diagnosis range of DTC P219C - P219F.

ABSNT

The vehicle condition is within the diagnosis range of DTC P219C - P219F.

PRSNT

A/F SEN1 DIAG3(B1)

The vehicle condition is not within the diagnosis range of DTC P014C, P014D, P015A or P015B.

ABSNT

The vehicle condition is within the diagnosis range of DTC P014C, P014D, P015A or P015B.

PRSNT

A/F imbalance B end flag

DTC P23F2 - P23F8 self-diagnosis incomplete.

INCMP

DTC P23F2 - P23F8 self-diagnosis is complete.

CMPLT

A/F imbalance B (B1) end flag

DTC P23FE self-diagnosis incomplete.

INCMP

DTC P23FE self-diagnosis is complete.

CMPLT

A/F IMBLNC DIAG-CPS CMPLT

Self-diagnosis of DTC P219C - P219F and P21A0 - P21A3 is incomplete.

INCMP

Self-diagnosis of DTC P219C - P219F and P21A0 - P21A3 is complete.

CMPLT

A/F imbalance B area flag

The vehicle condition is not within the diagnosis range of DTC P23F2 - P23F8.

ABSNT

The vehicle condition is within the diagnosis range of DTC P23F2 - P23F8.

PRSNT

A/F imbalance B (B2) area flag

The vehicle condition is not within the diagnosis range of DTC P23FF.

ABSNT

The vehicle condition is within the diagnosis range of DTC P23FF.

PRSNT

A/F imbalance B (B1) area flag

The vehicle condition is not within the diagnosis range of DTC P23FE.

ABSNT

The vehicle condition is within the diagnosis range of DTC P23FE.

PRSNT

Ignition timing 1

  • Engine: After warming up
  • Selector lever: P or N position
  • Air conditioner switch: OFF
  • No load

Idle

5 - 15 BTDC

]

2, 000 rpm

30 - 50 BTDC

VCR actual shaft 2 angle

Ignition switch: ON

Approx. 46.1 deg

DI timing SOI multi inj step1

NOTE: This item is displayed but are not applicable to this model.

--

Di inj pulse B1

  • Engine: After warming up
  • Selector lever: P or N position
  • Air conditioner switch: OFF
  • No load

Idle

2.2400 ms

]

2, 000 rpm

0.08448 ms

Di inj pulse B2

NOTE: This item is displayed but are not applicable to this model.

--

*1: Accelerator pedal position sensor 2 signal and throttle position sensor 2 signal are converted by ECM internally. Thus, they differ from ECM terminals voltage signal.

*2: Indicates the intake manifold runner control valve.

*3: Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to Work Flow .

*4: Varies with the atmospheric pressure changed by whether or elevation as this is an absolute pressure sensor.