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OBD II Fault Code P1709 :

Description of Fault code P1709

MODE SWITCH FAILURE

Possible failuer P1709

  • Signal line open
  • Signal line short
  • Switch failure

Diagnostic Procedure using AutoHex II

  • The PCM/ TCM monitors the actual mainshaft speed (rpm) and countershaft speed (rpm) ratios and the commanded ratio. The PCM/TCM computes these ratio continuously.
  • A malfunction is detected when a difference between the actual ratio and the commanded ratio occurs, and it is over the specific ratio.
  • When the 3rd -> 4th upshift has been made then the PCM/TCM detects neutral position while driving in 5th gear a malfunction is detected.

Test Conditions using AutoHex tester

  • D or D3 shift position
  • Battery Voltage > 11V
  • Upshifting 1st through 5th

Clear Fault codes Conditions

  • The PCM/ TCM monitors the actual mainshaft speed (rpm) and countershaft speed (rpm) ratios and the commanded ratio. The PCM/TCM computes these ratio continuously.
  • A malfunction is detected when a difference between the actual ratio and the commanded ratio occurs, and it is over the specific ratio.
  • When the 3rd -> 4th upshift has been made then the PCM/TCM detects neutral position while driving in 5th gear a malfunction is detected.

MIL Status

  • OFF

Changing Dmaged DME in F Series


Note:

  • AutoHex II is a professional Auto diagnostic.
  • This fault code is a GERENRIC fault code, some cars may change the meaning of this fault code.
    To get the accurate fault code description you may use AutoHex II

More Fault codes:

OBD II Fault Code P170A
OBD II Fault Code P170B
OBD II Fault Code P170C
OBD II Fault Code P170D
OBD II Fault Code P170E
OBD II Fault Code P170F
OBD II Fault Code P1710
OBD II Fault Code P1711
OBD II Fault Code P1712
OBD II Fault Code P1713
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