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Home >> Infiniti >> 2024 >> QX55 Essential >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission (DTC/Circuit Diagnosis) (2 Of 2) >> Transmission (TCM) >> P1588 DECEL G Sensor >> DTC Description

DTC Description

DTC DETECTION LOGIC 

DTC CONSULT screen terms(Trouble diagnosis content) DTC detection condition
P1588 G SENSOR(Decel G Sensor Performance) Diagnosis condition
  • Power supply voltage ≥ 11 V
  • DTC P159C and P159D not detected
Signal Decel G sensor signal
Threshold When the all of the following conditions a) to b) are satisfied twice in the same DC, DTC is detected a) | Variation of acceleration/deceleration | ≥ 0.0273 Gb) | Variation of G after passing Filter | ≤ 0.011 G : Continue for 1 sec
Diagnosis delay time 5 seconds x 2 count
NOTE: SYMBOL DC stands for "DRIVING CYCLE" and indicates a series of driving cycle of "Ignition switch OFF → ON → driving → OFF".

POSSIBLE CAUSE 

FAIL-SAFE 

Idle stop is not performed

DTC CONFIRMATION PROCEDURE 

  1. PREPARATION BEFORE WORK 

    If another "DTC CONFIRMATION PROCEDURE" occurs just before, ignition switch OFF and wait for at least 10 seconds, then perform the next test. TESTING CONDITION: Before performing the following procedure, confirm that battery voltage is more than 10 V.

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    GO TO 2.

  2. PERFORM DTC CONFIRMATION PROCEDURE 

    SYMBOL With CONSULT

    1. Start the engine.
    2. Select "Data Monitor" in "TRANSMISSION".
    3. Select "G SPEED".
    4. Drive the vehicle and maintain the following conditions for 10 seconds or more.
      Selector lever : "D" position
      Vehicle speed : More than 1 km/h (1 MPH)
      G SPEED : 0.05 G or more
      CAUTION:

      Be careful of the driving speed.

    5. Stop the vehicle.
      CAUTION:

      Never stop the engine.

    6. Repeat steps 4 through 5.
    7. Check the DTC.

    Is DTC detected?

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    Proceed to Diagnosis Procedure .

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

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    Confirmation after repair: INSPECTION END