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HOMESERVICE MANUALSNISSAN-DATSUN2024FRONTIER SL, RWDREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROL SYSTEM (DTC/CIRCUIT DIAGNOSIS) (5 OF 6)DTC/CIRCUIT DIAGNOSISDTC P1233: ELECTRIC THROTTLE CONTROL FUNCTIONDTC DESCRIPTION
2024 Nissan-Datsun Frontier SL, RWD

DTC Description

2024 Nissan-Datsun Frontier SL, RWDSECTION DTC Description

DTC DETECTION LOGIC 

DTC CONSULT screen terms (Trouble diagnosis content) DTC detection condition
P1233-00 ETC_FNCTN/CIRC-B2 (ETC Function Circuit Bank 2) Diagnosis condition Engine running at idle
Signal (terminal) Throttle control motor signal
Threshold Electric throttle control function does not operate properly
Diagnosis delay time -

POSSIBLE CAUSE 

  • Harness or connectors (Throttle control motor circuit is open or shorted)
  • Electric throttle control actuator (bank 2)

FAIL-SAFE 

Engine Control System 

Fail safe mode Vehicle behavior
Device fix mode
  • Fixes electric intake valve timing control motor in the reference position.
  • Fixes exhaust valve timing control solenoid valve in the reference position.
  • The Intake manifold runner control valve motor is turned OFF (Intake manifold runner control valve opens).
Others ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring.

Idle Start/Stop System 

Not applicable

DTC CONFIRMATION PROCEDURE 

  1. CHECK DTC PRIORITY 

    If DTC P1233 is displayed with DTC P1238 or P1290, first perform the confirmation procedure (trouble diagnosis) for DTC P1238 or P1290.

    Is DTC P1238 or P1290 detected?

    >>

    Perform diagnosis of applicable.

    >>

    GO TO 2.

  2. PRECONDITIONING 

    If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

    1. Turn ignition switch OFF and wait at least 10 seconds.
    2. Turn ignition switch ON.
    3. Turn ignition switch OFF and wait at least 10 seconds.

    TESTING CONDITION: Before performing the following procedure, confirm that battery voltage is more than 11 V when engine is running.

    >>

    GO TO 3.

  3. PERFORM DTC CONFIRMATION PROCEDURE 
    1. Turn ignition switch ON and wait at least 2 seconds.
    2. Start engine and let it idle for 5 seconds.
    3. Check DTC.

    Is DTC P1233 detected?

    >>

    Refer to DTC Diagnosis Procedure .

    >>

    To check malfunction symptom before repair: Refer to Intermittent Incident .

    >>

    Confirmation after repair: INSPECTION END

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.