No. 9 Abnormal Shift: Notes

WARNING: This page is about a different car, the 2005 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.

ABNORMAL SHIFT - DESCRIPTION & POSSIBLE CAUSE

9	Abnormal shift
DESCRIPTION	Shifts incorrectly, (incorrect shift pattern)
POSSIBLE CAUSE	There is a malfunction in the signal circuit which controls shifting (throttle position sensor, input/turbine speed sensor, and output speed sensor), the control valve is stuck, or the clutch circuit is stuck. Clutch slippage, burn Line pressure is low Misadjustment of throttle position sensor malfunction Output speed sensor malfunction Input/turbine speed sensor malfunction Sensor ground malfunction Shift solenoid A malfunction Shift solenoid B malfunction Torque converter clutch solenoid valve malfunction Body ground malfunction Throttle cable malfunction Control valve body malfunction NOTE: Before following the troubleshooting steps, make sure that the on-board diagnosis and basic inspection have been conducted.

Abnormal shift

DESCRIPTION

Shifts incorrectly, (incorrect shift pattern)

POSSIBLE CAUSE

There is a malfunction in the signal circuit which controls shifting (throttle position sensor, input/turbine speed sensor, and output speed sensor), the control valve is stuck, or the clutch circuit is stuck.
1. Clutch slippage, burn
  - Line pressure is low
  - Misadjustment of throttle position sensor malfunction
  - Output speed sensor malfunction
  - Input/turbine speed sensor malfunction
  - Sensor ground malfunction
  - Shift solenoid A malfunction
  - Shift solenoid B malfunction
  - Torque converter clutch solenoid valve malfunction
  - Body ground malfunction
  - Throttle cable malfunction
  - Control valve body malfunction
NOTE:
- Before following the troubleshooting steps, make sure that the on-board diagnosis and basic inspection have been conducted.