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Home >> Mazda >> 2016 >> MX-5 Miata Club, Automatic Trans >> Repair and Diagnosis >> Transmission >> Automatic Trans >> On-Board Diagnostics - A/T >> DTC P0819-00: M Position Switch Signal Error >> Notes

DTC P0819-00: M Position Switch Signal Error: Notes

DTC P0819:00 M position switch up or down switch signal: Signal error
DETECTION CONDITION  M position switch signal error 
  • Vehicle condition: TCM communication normal during engine rotation
  • Status: Detects that M position switch is on in P, R or N position
  • Period: Confirmed continuously for 2 s

Up switch malfunction or down switch signal error 

  • Vehicle condition: TCM communication normal during engine rotation
  • Status: Detects that up or down switch is on while M position switch is off
  • Period: Confirmed continuously for 10 s
FAIL-SAFE FUNCTION  M position switch signal error 
  • Inhibits the manual shift control.
  • Inhibits manual shifting using the up or down switch of the selector lever.
  • Inhibits direct mode.

Up switch malfunction or down switch signal error 

  • Inhibits manual shifting using the up or down switch of the selector lever.
POSSIBLE CAUSE  M position switch signal error 
  • Instrument cluster DTC is stored.
  • M position switch malfunction
  • Short to power supply in wiring harness between selector lever component terminal E and instrument cluster terminal H
  • Short to ground in wiring harness between selector lever component terminal E and instrument cluster terminal H
  • Open circuit in wiring harness between selector lever component terminal E and instrument cluster terminal H
  • Open circuit in wiring harness between selector lever component terminal H and body ground
  • TCM connector or terminal malfunction
  • Selector lever component connector or terminal malfunction
  • TCM malfunction

Up switch malfunction or down switch signal error 

  • Instrument cluster DTC is stored.
  • Up switch malfunction
  • Down switch malfunction.
  • Short to power supply in wiring harness between selector lever component terminal C and instrument cluster terminal F
  • Short to power supply in wiring harness between selector lever component terminal D and instrument cluster terminal G
  • Short to ground in wiring harness between selector lever component terminal C and instrument cluster terminal F
  • Short to ground in wiring harness between selector lever component terminal D and instrument cluster terminal G
  • Open circuit in wiring harness between selector lever component terminal C and instrument cluster terminal F
  • Open circuit in wiring harness between selector lever component terminal D and instrument cluster terminal G
  • Open circuit in wiring harness between selector lever component terminal H and body ground
  • TCM connector or terminal malfunction
  • Selector lever component connector or terminal malfunction
  • Instrument cluster malfunction
G10952513