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HOMESERVICE MANUALSNISSAN-DATSUN2012370Z TOURING, 2D CONVERTIBLE, STANDARD TRANSREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROL SYSTEM - INTRODUCTIONSYSTEM DESCRIPTIONDIAGNOSIS SYSTEM (ECM)DIAGNOSIS DESCRIPTIONCONSULT FUNCTIONSELF-DIAG RESULT MODE
2012 Nissan-Datsun 370Z Touring, 2D Convertible, Standard Trans

Self-Diag Result Mode

2012 Nissan-Datsun 370Z Touring, 2D Convertible, Standard TransSECTION Self-Diag 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".

  • 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(1) 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 ".)
CAL/LD VALUE [%]
  • The calculated load value at the moment a malfunction is detected is displayed.
COOLANT TEMP [°C] or [°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
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 [°C] or [°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
INT MANI PRES [kPa]
  • These items are displayed but are not applicable to this model.
COMBUST CONDITION
(1) 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.