No. 9 Abnormal Shifting: Notes

POSSIBLE CAUSE DESCRIPTION CHART

9

Abnormal shifting

DESCRIPTION

Shift incorrectly (incorrect shift pattern).

POSSIBLE CAUSE

There is a malfunction in the signal circuit which controls shifting (accelerator pedal position sensor, TP sensor, input/turbine speed sensor, vehicle speed sensor), the control valve is stuck, the accumulator (forward or servo apply) is stuck, or the clutch circuit is stuck.
1. Clutch slipped, burnt
  - Line pressure low
  - Control valve body malfunction
  - Shift solenoid D malfunction
  - Shift solenoid E malfunction
  - Shift solenoid A malfunction
  - Shift solenoid B malfunction
  - Shift solenoid C malfunction
  - Body GND malfunction
2. Signal malfunction
  - Vehicle speed sensor malfunction
  - Sensor GND malfunction
  - TP sensor malfunction or mis-adjustment
  - Accelerator pedal position sensor malfunction or mis-adjustment
  - Input/turbine speed sensor malfunction
3. TR switch malfunction
  - Selector lever adjustment incorrect
  - TR switch adjustment incorrect
NOTE:
- Before following the troubleshooting steps, make sure that the Automatic Transaxle On-Board Diagnostic and Automatic Transaxle Basic Inspection are conducted. (See BASIC INSPECTION ).