NO.14 ENGINE FLARES UP OR SLIPS WHEN UPSHIFTING OR DOWNSHIFTING [FN4A-EL]

id050301801900

14	Engine flares up or slips when upshifting or downshifting
DESCRIPTION	•  When accelerator pedal is depressed for driveway, engine speed increases but vehicle speed increases slowly. •  When accelerator pedal is 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. 1.  Clutch stuck, slippage, burnt (forward clutch, 3–4 clutch, 2–4 brake band, one-way clutch) •  Line pressure low •  Shift solenoid D malfunction •  Shift solenoid E malfunction •  Shift solenoid A malfunction •  Shift solenoid B malfunction •  Shift solenoid C malfunction •  Pressure control solenoid malfunction •  Body GND malfunction •  Accelerator pedal position sensor malfunction •  Control valve body malfunction 2.  Signal malfunction •  Vehicle speed sensor malfunction •  Sensor GND malfunction •  Accelerator pedal position sensor malfunction •  Input/turbine speed sensor malfunction 3.  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.

Diagnostic procedure