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HOMESERVICE MANUALSINFINITI2019Q70 3.7 LUXE, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 15 (ENGINE CONTROL SYSTEM (5.6L) (2 OF 3))SYSTEM DESCRIPTIONDIAGNOSIS SYSTEM (ECM)CONSULT FUNCTIONSELF DIAGNOSTIC RESULT MODE
2019 Infiniti Q70 3.7 Luxe, AWD

Self Diagnostic Result Mode

2019 Infiniti Q70 3.7 Luxe, AWDSECTION Self Diagnostic Result Mode
WARNING: This page is about a different variant/trim than selected.

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".

  • When ECM detects a 1st trip DTC, "1t" is displayed for "TIME".
  • When ECM has detected a current DTC, "0" is displayed for "TIME".
  • If "TIME" is neither "0" nor "1t", the DTC occurred in the past and ECM shows the number of times the vehicle has been driven since the last detection of the DTC.

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.
  • If the DTC is not for A/T related items (see DTC Index ), skip step 1.
  1. Erase DTC in TCM. Refer to Diagnosis Description .
  2. Select "ENGINE" with CONSULT.
  3. Select "SELF-DIAG RESULTS".
  4. Touch "ERASE". (DTC in ECM will be erased.)

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 the is displayed as PXXXX. (Refer to DTC Index .)

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.

VEHICLE 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.

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.

FUEL RAIL PRESSURE [MPa]
  • The fuel rail pressure at the moment a malfunction is detected is displayed.

TARGET FUEL RAIL PRESSURE [MPa]
  • The target fuel rail pressure at the moment a malfunction is detected is displayed.

BATTERY VOLTAGE [V]
  • The battery voltage at the moment a malfunction is detected is displayed.

FUEL LEVEL [%]
  • The fuel level at the moment a malfunction is detected is displayed.

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

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.