00652

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00652 - Gear Monitoring

00652 - Gear Monitoring: Implausible Signal

Possible Causes

  • Automatic Transmission Fluid (ATF) Level not OK
  • Vehicle Speed Sensor (G68) dirty/faulty
    • Impulse Wheel dirty or Installation faulty
  • Gearbox Speed Sensor (G38) dirty/faulty
    • Impulse Wheel dirty or Installation faulty
  • Multi-Function Switch (F125) faulty (but not detected)
  • Clutch or Valve Body faulty
  • Automatic Transmission Fluid (ATF) Pump faulty

Possible Solutions

  • Check Automatic Transmission Fluid (ATF) Level
  • Check/Clean/Replace Vehicle Speed Sensor (G68)
  • Check/Clean/Replace Gearbox Speed Sensor (G38)
  • Check/Replace Multi-Function Switch (F125)
  • Check/Replace Clutch and/or Valve Body

Special Notes

  • The ratio of engine speed to gearbox output speed in the currently engaged gear is implausible.
  • Slip rpm with torque converter lock-up clutch disengaged must be greater than stall speed.
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