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Home >> Infiniti >> 2021 >> Q50 Pure, AWD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission (DTCS) >> Transmission (TCM) >> DTC P0721: Output Speed Sensor >> DTC Description >> DTC Detection Logic

DTC Detection Logic

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

P0721

OUTPUT SPEED SENSOR

(Output Shaft Speed Sensor Circuit Range/Performance)

Diagnosis condition

When all of the following conditions are satisfied with different gears:

  • At no gear change
  • Selector lever: Other than P, R, N
  • Vehicle speed: 10 km/h (7 MPH) or more
  • Input speed: 300 RPM or more
  • Engine speed: "Input speed" -"100 RPM" or more
  • 1.5 seconds or more after shift from D to M position
  • When any of the following throttle position is established;
    • Driving at D 1 , D 2 : 2.0/8 or more
    • Driving at M1, M2: 0.625/8 or more
    • Other than above: 0/8 or more

Signal

Output speed sensor signal

Threshold

TCM judges that output speed sensor signal is not reasonable by comparing input speed sensor 1 signal, input speed sensor 2 signal and output speed sensor signal.

Diagnosis delay time

Satisfy for four times in 1DC according to any of the following;

  • ATF temperature is 200 deg. C (392 deg. F) or less: 1 second or more
  • ATF temperature is 20 deg. C (68 deg. F) or less: 5 seconds or more
  • ATF temperature is -30 deg. C (-22 deg. F) or less: 22 minutes or more
NOTE: "DC" stands for "DRIVING CYCLE" and indicates a series of driving cycle of "Ignition switch OFF -> ON -> driving -> OFF".