No.14 Engine Flares Up Or Slips When Upshifting Or Downshifting: Notes

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

ENGINE FLARES UP OR SLIPS WHEN UPSHIFTING OR DOWNSHIFTING - DESCRIPTION AND POSSIBLE CAUSES

14	Engine flares up or slips when upshifting or downshifting
DESCRIPTION	When accelerator pedal depressed for driveway, engine speed increases but vehicle speed increase slowly. When accelerator pedal depressed while driving, engine speed increases but vehicle does not.
POSSIBLE CAUSE	There is clutch slip because clutch is stuck or line pressure is low. Clutch stuck, slippage Line pressure low Incorrect throttle position signal Malfunction of VSS Malfunction of input/turbine speed sensor Malfunction of sensor ground Malfunction of shift solenoid A, B, or C Malfunction of TCC solenoid valve Malfunction of body ground Misadjustment of throttle cable Malfunction of control valve body Poor operation of mechanical pressure Selector lever position disparity TR switch position disparity NOTE: Before following troubleshooting steps, make sure that Automatic Transaxle On-Board Diagnostic and Automatic Transaxle Basic Inspection are conducted.

Engine flares up or slips when upshifting or downshifting

DESCRIPTION

When accelerator pedal depressed for driveway, engine speed increases but vehicle speed increase slowly.
When accelerator pedal depressed while driving, engine speed increases but vehicle does not.

POSSIBLE CAUSE

There is clutch slip because clutch is stuck or line pressure is low.
- Clutch stuck, slippage
  - Line pressure low
  - Incorrect throttle position signal
  - Malfunction of VSS
  - Malfunction of input/turbine speed sensor
  - Malfunction of sensor ground
  - Malfunction of shift solenoid A, B, or C
  - Malfunction of TCC solenoid valve
  - Malfunction of body ground
  - Misadjustment of throttle cable
  - Malfunction of control valve body
- Poor operation of mechanical pressure
  - Selector lever position disparity
  - TR switch position disparity
NOTE:
- Before following troubleshooting steps, make sure that Automatic Transaxle On-Board Diagnostic and Automatic Transaxle Basic Inspection are conducted.