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Home >> Nissan-Datsun >> 2019 >> Maxima SL >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Introduction And Basic Inspection) >> Ecu Diagnosis Information >> ECM >> Values on the Diagnosis Tool

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 cam shaft position sensor and other sensors related to ignition timing.

For outlines of following items, refer to 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 AIR FLOW SENSOR (Hz)

See Component Function Check .

B/FUEL SCHDL

See Component Function Check .

A/F ALPHA-B1

See Component Function Check .

A/F ALPHA-B2

See Component Function Check .

COOLANT TEMP/S

Engine: After warming up

More than 70 deg.C (158 deg.F)

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 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 (B2)

Revving engine from idle 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)

Revving engine from idle 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

HO2S2 MNTR(B2)

Revving engine from idle 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 value with the speedometer indication.

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

0.5 - 1.0 V

Accelerator pedal: Fully depressed

4.2 - 4.8 V

ACCEL SEN 2* 1

Ignition switch: ON

(Engine stopped)

Accelerator pedal: Fully released

0.5 - 1.0 V

Accelerator pedal: Fully depressed

4.2 - 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 T/TMP SE

Ignition switch: ON

Indicates fuel tank temperature

EVAP SYS PRES

Ignition switch: ON

Approx. 1.8 - 4.8 V

FUEL LEVEL SE

Ignition switch: ON

Depending on fuel level of fuel tank

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

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: P or N position
  • Air conditioner switch: OFF
  • No load

Idle

2.0 - 3.0 msec

2, 000 rpm

1.9 - 2.9 msec

INJ PULSE-B2

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

Idle

7 - 17 deg.BTDC

2, 000 rpm

25 - 45 deg.BTDC

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%

MASS AIRFLOW

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

Idle

2.0 - 6.0 g/s

2, 500 rpm

7.0 - 20.0 g/s

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

--

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 - 30 deg.CA

INT/V TIM (B2)

  • 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 - 30 deg.CA

INT/V SOL(B1)

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

Idle

0 - 2%

2, 000 rpm

Approx. 0 - 50%

INT/V SOL(B2)

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

Idle

0 - 2%

2, 000 rpm

Approx. 0 - 50%

VIAS S/V-1

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

When revving engine up to 5, 000 rpm quickly

Off ->On -> Off

AIR COND RLY

Engine: After warming up, idle the engine

Air conditioner switch: OFF

Off

Air conditioner switch: ON

(Compressor operates)

On

ENGINE MOUNT

Engine: After warming up

Below 950 rpm

IDLE

Above 950 rpm

TRVL

FUEL PUMP RLY

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

On

Except above

Off

VENT CONT/V

Ignition switch: ON

Off

THRTL RELAY

Ignition switch: ON

On

A/F S1 HTR(B2)

Engine: After warming up, idle the engine

(More than 140 seconds after starting engine)

4 - 100%

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

Engine speed: Above 3, 600 rpm

Off

HO2S2 HTR (B2)

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

Engine speed: Above 3, 600 rpm

Off

I/P PULLY SPD

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

IDL A/V LEARN

Engine: Running

Idle air volume learning has not been performed yet.

Yet

Idle air volume learning has already been performed successfully.

CMPLT

TRVL AFTER MIL

Ignition switch: ON

Vehicle has traveled after MIL has illuminated.

0 - 65, 535 km

(0 - 40, 723 miles)

ENG OIL TEMP

Engine: After warming up

More than 70 deg.C (158 deg.F)

A/F S1 HTR(B1)

Engine: After warming up, idle the engine

(More than 140 seconds after starting engine)

4 - 100%

VHCL SPEED SE

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

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

RESUME/ACC SW

Ignition switch: ON

RES/+ switch: Pressed

On

RES/+ switch: Released

Off

SET SW

Ignition switch: ON

SET/- switch: Pressed

On

SET/- switch: Released

Off

BRAKE SW1

(Brake pedal position switch)

Ignition switch: ON

Brake pedal: Fully released

On

Brake pedal: Slightly depressed

Off

BRAKE SW2

(Stop lamp switch)

Ignition switch: ON

Brake pedal: Fully released

Off

Brake pedal: Slightly depressed

On

VHCL SPD CUT

Ignition switch: ON

Non

LO SPEED CUT

Ignition switch: ON

Non

AT OD MONITOR

Ignition switch: ON

Off

AT OD CANCEL

Ignition switch: ON

Off

CRUISE LAMP

Ignition switch: ON

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

On -> Off

SET LAMP

  • MAIN switch: ON
  • When vehicle speed is between 40 km/h (25 MPH) and 144 km/h (89 MPH)

ASCD: Operating

On

ASCD: Not operating

Off

VIAS S/V-2

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

When revving engine up to 5, 000 rpm quickly

Off ->On -> Off

COOLING FAN

  • Engine: After warming up, idle the engine
  • Air conditioner switch: OFF

Engine coolant temperature: 97 deg.C (206 deg.F) or less

OFF

Engine coolant temperature: Between 98 deg.C (208 deg.F) and 99 deg.C (210 deg.F)

LOW

Engine coolant temperature: Between 100 deg.C (212 deg.F) and 104 deg.C (219 deg.F)

MID

Engine coolant temperature: 105 deg.C (221 deg.F) or more

HI

A/F ADJ-B1

Engine: Running

-0.330 - 0.330

A/F ADJ-B2

Engine: Running

-0.330 - 0.330

P/N POSI SW

Ignition switch: ON

Selector lever: P or N position

On

Selector lever: Except above position

Off

INT/A TEMP SE

Ignition switch: ON

Indicates intake air temperature

AC PRESS SEN

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

1.0 - 4.0 V

A/F SEN1 (B2)

Engine: After warming up

Maintaining engine speed at 2, 000 rpm

Fluctuates around 2.2 V

EVAP LEAK DIAG

Ignition switch: ON

Indicates the condition of EVAP leak diagnosis.

EVAP DIAG READY

Ignition switch: ON

Indicates the ready condition of EVAP leak diagnosis.

BAT TEMP SEN

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

Idle

Approx. 0.68 V

THRTL STK CNT B1 *3

--

--

HO2 S2 DIAG1(B2)

DTC P0159 self-diagnosis (delayed response) has not been performed yet.

INCMP

DTC P0159 self-diagnosis (delayed response) has already been performed successfully.

CMPLT

A/F SEN1 DIAG1 (B2)

DTC P015C and P015D self-diagnosis is incomplete.

INCMP

DTC P015C and P015D self-diagnosis is complete.

CMPLT

A/F SEN1 DIAG1 (B1)

DTC P015A and P015B self-diagnosis is incomplete.

INCMP

DTC P015A and P015B self-diagnosis is complete.

CMPLT

A/F SEN1 DIAG2 (B2)

DTC P014E and P014F self-diagnosis is incomplete.

INCMP

DTC P014E and P014F self-diagnosis is complete.

CMPLT

A/F SEN1 DIAG2 (B1)

DTC P014C and P014D self-diagnosis is incomplete.

INCMP

DTC P014C and P014D self-diagnosis is complete.

CMPLT

A/F SEN1 DIAG3 (B2)

The vehicle condition is not within the diagnosis range of DTC P014E, P014F, P015C or P015D.

ABSNT

The vehicle condition is within the diagnosis range of DTC P014E, P014F, P015C or P015D.

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

HO2 S2 DIAG2(B2)

DTC P0159 self-diagnosis (slow response) has not been performed yet.

INCMP

DTC P0159 self-diagnosis (slow response) has already been performed successfully.

CMPLT

HO2 S2 DIAG2(B1)

DTC P0139 self-diagnosis (slow response) has not been performed yet.

INCMP

DTC P0139 self-diagnosis (slow response) has already been performed successfully.

CMPLT

EOP SENSOR

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

Idle

Approx. 1, 450 mV

2, 000 rpm

Approx. 2, 850 mV

HO2 S2 DIAG1(B1)

DTC P0139 self-diagnosis (delayed response) has not been performed yet.

INCMP

DTC P0139 self-diagnosis (delayed response) has already been performed successfully.

CMPLT

EXT/V TIM B1

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

Idle

-5 - 5 deg.CA

Around 2, 500 rpm while the engine speed is rising

Approx. 0 - 30 deg.CA

EXT/V TIM B2

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

Idle

-5 - 5 deg.CA

Around 2, 500 rpm while the engine speed is rising

Approx. 0 - 30 deg.CA

VTC DTY EX B1

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

Idle

0 - 2%

Around 2, 500 rpm while the engine speed is rising

Approx. 0 - 70%

VTC DTY EX B2

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

Idle

0 - 2%

Around 2, 500 rpm while the engine speed is rising

Approx. 0 - 70%

A/F-S ATMSPHRC CRCT B1

Engine: After warming up, idle the engine

Varies depending on vehicle environment.

A/F-S ATMSPHRC CRCT B2

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.

A/F-S ATMSPHRC CRCT UP B2

Engine: Running

Varies depending on the number of updates.

SYSTEM 1 DIAGNOSIS A B1

DTC P219A self-diagnosis is incomplete.

INCMP

DTC P219A self-diagnosis is complete.

CMPLT

SYSTEM 1 DIAGNOSIS A B2

DTC P219B self-diagnosis is incomplete.

INCMP

DTC P219B 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

SYSTEM 1 DIAGNOSIS B B2

DTC P219B self-diagnosis is on standby.

ABSENT

DTC P219B self-diagnosis is under diagnosis.

PRSENT

*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: Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to How to Handle Battery .

*3: The item is indicated, but not used.