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Home >> Mazda >> 2024 >> CX-90 Turbo Select >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Symptom Troubleshooting - Automatic Transaxle (Mm8AX-EC) >> Shift Point Is High Or Low

Shift Point Is High Or Low

SHIFT POINT IS HIGH OR LOW (NJ8A(X)-EC/NN8A(X)-EC/MM8A(X)-EC) DESCRIPTION AND POSSIBLE CAUSE

Description
  • Shift point considerably different from automatic shift diagram.
  • Shift delays when accelerating.
  • Shift occurs suddenly when accelerating and engine speed does not increase.
Possible cause
NOTE:
  • When driving on an upslope, downslope, circular road, or at high altitudes, the TCM may determine that the driving mode is AAS mode and set the shift timing different from normal.
  • For vehicles with Mi-Drive, when a mode other than NORMAL is selected, a gear lower than NORMAL is selected and the gear is maintained for a longer period of time.
  • When the engine coolant temperature is low, the gear is lower than it is in NORMAL mode.
  • When driving on slippery roads, 7th and 8th gears may not be selected to assure vehicle stability.
  1. Input signal malfunction in the following. (See PID/DATA MONITOR INSPECTION .)

    PCM: 

  2. Low-G (XY) sensor (built into SAS control module) malfunction (Refer to [SAS CONTROL MODULE REMOVAL/INSTALLATION ] ).
System wiring diagram
  • Not applicable