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Home >> Nissan-Datsun >> 2020 >> Maxima SL >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System >> System Description >> Diagnosis System (ECM) >> CONSULT Function >> Self Diagnostic Result Mode
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Self Diagnostic Result Mode

Self Diagnostic Item 

Regarding items of DTC and 1st trip DTC, refer to DTC Index .

How to Read DTC and 1st Trip DTC 

DTCs and 1st trip DTCs related to the malfunction are displayed in "self-diag results".

How to Erase DTC and 1st Trip DTC 

NOTE: If the ignition switch stays ON after repair work, be sure to turn ignition switch OFF once. Wait at least 10 seconds and then turn it ON (engine stopped) again.

Freeze Frame Data and 1st Trip Freeze Frame Data 

Freeze frame data item*

Description

DIAG TROUBLE CODE

[PXXXX]

The engine control component part/control system has a trouble code that is displayed as PXXXX. (Refer to DTC Index .)

FUEL SYS-B1

  • "Fuel injection system status" at the moment a malfunction is detected is displayed.
  • One of the following mode is displayed.

    Mode2: Open loop due to detected system malfunction

    Mode3: Open loop due to driving conditions (power enrichment, deceleration enleanment)

    Mode4: Closed loop - using oxygen sensor(s) as feedback for fuel control

    Mode5: Open loop - has not yet satisfied condition to go to closed loop

FUEL SYS-B2

COMBUST CONDITION

These items are displayed but are not applicable to this model.

CAL/LD VALUE [%]

The calculated load value at the moment a malfunction is detected is displayed.

COOLANT TEMP [deg.C] or [deg.F]

The engine coolant temperature at the moment a malfunction is detected is displayed.

L-FUEL TRM-B1 [%]

  • "Long-term fuel trim" at the moment a malfunction is detected is displayed.
  • The long-term fuel trim indicates much more gradual feedback compensation to the base fuel schedule than short-term fuel trim.

L-FUEL TRM-B2 [%]

S-FUEL TRM-B1 [%]

  • "Short-term fuel trim" at the moment a malfunction is detected is displayed.
  • The short-term fuel trim indicates dynamic or instantaneous feedback compensation to the base fuel schedule.

S-FUEL TRM-B2 [%]

ENGINE SPEED [rpm]

The engine speed at the moment a malfunction is detected is displayed.

VEHICL SPEED

[km/h] or [mph]

The vehicle speed at the moment a malfunction is detected is displayed.

INT MANI PRES [kPa]

These items are displayed but are not applicable to this model.

ABSOL TH.P/S [%]

The throttle valve opening angle at the moment a malfunction is detected is displayed.

B/FUEL SCHDL [msec]

The base fuel schedule at the moment a malfunction is detected is displayed.

INT/A TEMP SE [deg.C] or [deg.F]

The intake air temperature at the moment a malfunction is detected is displayed.

*: The items are the same as those of 1st trip freeze frame data.