Inspection Procedure 6: Engine Stalls During Shifting




COMMENTS ON TROUBLE SYMPTOM




PROBABLE CAUSES



  • Malfunction of engine system
  • Malfunction of damper clutch solenoid valve
  • Malfunction of valve body
  • Malfunction of torque converter (damper clutch)
  • Malfunction of the A/T-ECU

DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III actuator test


Item 06: Damper clutch solenoid valve
OK: Operating sound can be heard.

Q. Is the check result normal?

Go to Step 2.
Replace the damper clutch solenoid valve.

STEP 2. Valve body disassembly clean and assembly


(1)Check the bolts for looseness and the O-ring, solenoid valve and valve body for damage.
Replace the valve body assembly if the damages are thought to be irreparable.
(2)Test drive the vehicle.
(3)Verify that the condition described by the customer exists.

Q. Does a malfunction take place again?

Go to Step 3.
The inspection is complete.

STEP 3. Torque converter check


Check for damaged drive plate, incorrect installation in the input shaft (inserted at an angle), damaged splines or damper clutch sealing.

Q. Is the check result normal?

Go to Step 4.
If repair is possible, repair the damaged part. If repair is not possible because the splines on the drive plate or torque converter are damaged, replace it.

STEP 4. Engine system check


Q. Is the check result normal?

Replace the A/T-ECU.
Repair the engine system.