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DTC P0979: Notes

DTC P0979 [AW6A-EL, AW6AX-EL] DETECTION CONDITION AND POSSIBLE CAUSES

DTC P0979 Shift solenoid C circuit malfunction (short to ground/open circuit)
DETECTION CONDITION 
  • Open or short circuit in shift solenoid C signal system (The solenoid circuit current value input to the TCM is continuously less than 23 mA for 100 ms or more). 

Diagnostic support note: 
  • This is a continuous monitor (CCM).
  • The MIL illuminates if the TCM detects the above malfunction condition during the first drive cycle.
  • A PENDING CODE is not available.
  • FREEZE FRAME DATA is available.
  • The AT warning light illuminates.
  • The DTC is stored in the TCM memory.
POSSIBLE CAUSE 
  • Open circuit between shift solenoid C terminal B and TCM terminal B11
  • Open circuit between shift solenoid C terminal A and TCM terminal B10
  • Short to ground in wiring harness between shift solenoid C terminal B and TCM terminal B11
  • Short to ground in wiring harness between shift solenoid C terminal A and TCM terminal B10
  • Shift solenoid C malfunction
  • Damaged connector between line pressure control solenoid and TCM
  • TCM malfunction
G04860309Courtesy of MAZDA MOTORS CORP.
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