Inspection Procedure 4: Poor Acceleration or Incomplete Shifting Operation


SYMPTOMS



PROBABLE CAUSES



  • Malfunction of forward clutch
  • Malfunction of torque converter
  • Malfunction of CVT assembly
  • Malfunction of valve body assembly
  • Malfunction of CVT-ECU

DIAGNOSTIC PROCEDURE

STEP 1. Engine-related troubleshooting check
Check for engine malfunction.

Q. Is the check result normal?
Go to Step 2.
Carry out the engine-related troubleshooting.

STEP 2. Torque converter stall test implementation
Refer to .

Q. Is the check result normal?
Go to Step 4.
NO (stall speed is low.) : Replace the torque converter.
NO (stall speed is high.) : Go to Step 3.

STEP 3. Retest the system.
Replace CVT-ECU, and then recheck symptoms.

Q. Does the malfunction take place again?
Replace the CVT assembly.
The inspection is complete.

STEP 4. Forward clutch pressure check
Carry out "hydraulic test"(Refer to ).

Q. Is the check result normal?
Replace the forward clutch.
Replace the valve body assembly.