Inspection Procedure 5: Does not Move (Forward or Backward)

COMMENTS ON TROUBLE SYMPTOM

If the vehicle does not move forward or backward when the selector lever is shifted to any position while the engine is idling, the cause is probably an abnormal line pressure, a malfunction of the power train components, oil pump or valve body.

PROBABLE CAUSES

Abnormal line pressure
Malfunction of valve body
Malfunction of torque converter
Malfunction of oil pump
Malfunction of each element
Malfunction of power train components

DIAGNOSIS PROCEDURE

STEP 1. Hydraulic pressure test

Measure the hydraulic pressure of each element when the transmission is in 1st gear, 2nd gear or reverse gear.

OK: Refer to .

Q. Is the check result normal?

	Go to Step 4.

	Go to Step 2.

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) or damaged splines.

Q. Is the check result normal?

	Check the oil pump for incorrect installation, damage and etc., and replace the oil pump assembly if necessary (The oil pump cannot be disassembled.)

	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. Power train components check

Disassemble the transmission and check the input shaft, planetary carrier, output shaft and each element, etc.

Q. Is the check result normal?

	The inspection is complete.

	Repair or replace each power train components.