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Home >> Infiniti >> 2024 >> Q50 Luxe, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (1 Of 2) >> Basic Inspection >> Engine Control System >> How To Set SRT Code >> Work Procedure
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Work Procedure

OUTLINE 

In order to set all SRTs, the self-diagnoses as in the "SRT ITEM" table must have been performed at least once. Each diagnosis may require actual driving for a long period of time under various conditions.

SRT ITEM 

The table below shows required self-diagnostic items to set the SRT to "CMPLT".

SRT item*1
(CONSULT indication)
Required self-diagnostic items to set the SRT to "CMPLT" Corresponding DTC No.
CATALYST Three way catalyst function P0420, P0430
EVAP SYSTEM EVAP control system purge flow monitoring P0441
EVAP control system P0456, P00FE
HO2S Air fuel ratio (A/F) sensor 1 P014C, P014D, P014E, P014F, P015A, P015B, P015C, P015D, P2237, P2238, P2239, P2240, P2241, P2242, P2251, P2252, P2253, P2254, P2255, P2256
Heated oxygen sensor 2 P0137, P0157, P2270, P2272
Heated oxygen sensor 2 P0136, P0138, P0156, P0158, P2A01, P2A04
Heated oxygen sensor 2 P0139, P0159
EGR/VVT SYSTEM Intake valve timing control function P0011, P0012, P0016, P0018, P0021, P0022, P052A, P052B, P052C, P052D
Exhaust valve timing control function P0014, P0019, P0024, P0025

*1: Though displayed on the CONSULT screen, "HO2S HTR" is not SRT item.

SRT SERVICE PROCEDURE 

If a vehicle has failed the state emissions inspection due to one or more SRT items indicating "INCMP", review the flowchart diagnostic sequence, referring to the following flowchart.

GNSDB108785Courtesy of NISSAN NORTH AMERICA, INC.
  1. CHECK DTC 

    Check DTC.

    Is any DTC detected?

    YES>>

    Repair malfunction(s) and erase DTC. Refer to DTC Index .

    NO>>

    GO TO 2.

  2. CHECK SRT STATUS 

    SYMBOL With CONSULT Select "SRT STATUS" in "SRT and P-DTC" mode with CONSULT.SYMBOL Without CONSULT Perform "SRT status" mode with Diagnosis Description .SYMBOL With GST Select Service $01 with GST. Is SRT code(s) set?

    YES>>

    GO TO 12.

    NO-1>>

    With CONSULT : GO TO 3.

    NO-2>>

    Without CONSULT : GO TO 4.

  3. DTC CONFIRMATION PROCEDURE 
    1. Select "SRT STATUS" in "SRT and P-DTC" mode with CONSULT.
    2. For SRT(s) that is not set, perform the corresponding "DTC CONFIRMATION PROCEDURE" according to the "Performance Priority" in the "SRT ITEM" table. Refer to Work Procedure .
    3. Check DTC.

    Is any DTC detected?

    YES>>

    Repair malfunction(s) and erase DTC. Refer to DTC Index .

    NO>>

    GO TO 11.

  4. PERFORM ROAD TEST 
    • Check the "Performance Priority" in the "SRT ITEM" table. Refer to Work Procedure .
    • Perform the most efficient SRT set driving pattern to set the SRT properly. Refer to SRT Set Driving Pattern . In order to set all SRTs, the SRT set driving pattern must be performed at least once.

    >>

    GO TO 5.

  5. PATTERN 1 
    1. Check the vehicle condition;
      • Engine coolant temperature is -10 to 35°C (14 to 95°F).
      • Fuel tank temperature is more than 0°C (32°F).
    2. Start the engine.
    3. Keep engine idling until the engine coolant temperature is greater than 70°C (158°F)
    NOTE: ECM terminal voltage is follows;
    • Engine coolant temperature
      • -10 to 35°C (14 to 95°F): 3.0 - 4.3 V
      • 70°(158°F): Less than 1.4 V
    • Fuel tank temperature: Less than 4.1 V

    Refer to Physical Values .

    >>

    GO TO 6.

  6. PATTERN 2 
    1. Drive the vehicle. And depress the accelerator pedal until vehicle speed is 90 km/h (56 MPH), then release the accelerator pedal and keep it released for more than 10 seconds.
    2. Depress the accelerator pedal until vehicle speed is 90 km/h (56 MPH) again
    NOTE:
    • Checking the vehicle speed with GST is advised.
    • When steady-state driving is performed again even after it is interrupted, each diagnosis can be conducted. In this case, the time required for diagnosis may be extended.

    >>

    GO TO 7.

  7. PATTERN 3 
    • Operate vehicle following the driving pattern shown in the illustration.
      GNSDB106820Courtesy of NISSAN NORTH AMERICA, INC.
    • Release the accelerator pedal during deceleration of vehicle speed from 90 km/h (56 MPH) to 0 km/h (0 MPH).

    >>

    GO TO 8.

  8. PATTERN 4 
    • Operate vehicle following the driving pattern shown in the illustration.
      GNSDB106699Courtesy of NISSAN NORTH AMERICA, INC.
      1. Drive the vehicle in a proper gear at 60 km/h (38 MPH) and maintain the speed.
      2. Release the accelerator pedal fully at least 5 seconds.
      3. Repeat the above two steps at least 5 times.

    >>

    GO TO 9.

  9. PATTERN 5 
    • The accelerator pedal must be held very steady during steady-state driving.
    • If the accelerator pedal is moved, the test must be conducted again.

    >>

    GO TO 10.

  10. PATTERN 6 

    Start engine and wait at least 2 hours. Then turn ignition switch OFF and wait at least 90 minutes.

    >>

    GO TO 11.

  11. CHECK SRT STATUS 

    SYMBOL With CONSULT Select "SRT STATUS" in "DTC and SRT CONFIRMATION" mode with CONSULT.SYMBOL Without CONSULT Perform "SRT status" mode with Diagnosis Description .SYMBOL With GST Select Service $01 with GST. Is SRT(s) set?

    YES>>

    GO TO 12.

    NO>>

    Call TECH LINE or take appropriate action.

  12. CHECK PERMANENT DTC 
    NOTE: Permanent DTC cannot be checked with a tool other than CONSULT or GST.

    SYMBOL With CONSULT Select "SRT STATUS" in "DTC and SRT CONFIRMATION" mode with CONSULT.SYMBOL With GST Select Service $0A with GST. Is permanent DTC(s) detected?

    YES>>

    Refer to Work Procedure .

    NO>>

    END