Inspection Procedure 3: The acceleration is poor.




PROBABLE CAUSES



  • Malfunction of the engine
  • Malfunction of the A/T-ECU
  • A/T-ECU power supply or earth failure
  • Malfunction of the torque converter
  • A/T failure: Hydraulic system (valve body assembly), driving force transmission system (clutch/brake)

DIAGNOSIS PROCEDURE


STEP 1. Check the engine performance.


Q. Is the check result normal?

Go to Step 2.
Repair the failure, and perform adjustment.

STEP 2. Compare with another same model vehicle.


Q. Is there a difference from the same model vehicle?

Go to Step 3.
The procedure is complete.

STEP 3. Check the A/T-ECU power supply and earth.


Q. Is the check result satisfactory?

Go to Step 4.
Repair the wiring.

STEP 4. Replace the A/T-ECU.


Q. Is the failure resolved?

The procedure is complete.
Go to Step 5.

STEP 5. Check the A/T fluid.


Check the A/T fluid for seizure, fouling, and foreign material. Also, check that the fluid level is adequate.

Q. Is the check result normal?

Go to Step 6.
Go to Step 7.

STEP 6. Replace the torque converter.


Q. Is the failure resolved?

The procedure is complete.
Go to Step 7.

STEP 7. Remove the transmission assembly from the vehicle.


Disassemble and check the transmission assembly to check if there is a foreign material inside.

Q. Is the check result satisfactory?

Replace the transmission assembly.
Replace the failure part.