FixVault

Abnormal Shifting: Notes

ABNORMAL SHIFTING DETECTION CONDITION AND POSSIBLE CAUSE

TROUBLESHOOTING ITEM  Abnormal shifting 
DESCRIPTION 
  • Shifts incorrectly (incorrect shift pattern).
POSSIBLE CAUSE 
  1. Signal malfunction
    • APP sensor malfunction
    • BARO sensor malfunction
    • Brake switch malfunction
    • CKP sensor malfunction
    • ECT sensor No. 1 malfunction
    • IAT sensor No. 1 malfunction
    • MAF sensor malfunction
  2. Low-G (XY) sensor (built into SAS control module) malfunction
    NOTE:
    • If a tire of a different diameter from the standard tire is installed, the TCM determines that the driving mode is the AAS mode, and may change to a different shift timing from the normal timing.
CAUTION:
  • Verify the malfunction symptom according to not only the PID value but also the symptom troubleshooting.