Inspection Procedure 7

Inspection Procedure 7: The fluid temperature warning lamp illuminates too frequently.

PROBABLE CAUSES

- Thermal deterioration of the transmission fluid

- Damaged wiring harness and connectors

- Malfunction of the transmission fluid temperature sensor

- Clogged coolant system

- Clogged air-cooled transmission fluid cooler system

- Malfunction of the thermo valve

- Malfunction of TCM

- Malfunction of CVT assembly

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III special function

Check the deterioration level of the transmission fluid.

NOTE:
The transmission fluid deterioration level is the accumulation of the values counted depending on the fluid temperature of a certain period of time, and it shows the thermal deterioration level of the transmission fluid.

Q. Is the deterioration level of the transmission fluid less than 210,000?

YES Go to Step 2.
NO Replace the transmission Fluid.
STEP 2. M.U.T.-III data list

Item 5: Transmission fluid temperature sensor (Refer to Data List Reference Table Data List Reference Table.)

Q. Is the check result normal?

YES Go to Step 3.
NO : Diagnosis code No.P0712, P0713: Diagnose the transmission fluid temperature sensor P0712.
STEP 3. Air-cooled transmission fluid cooler system clogging check [2.4 L engine]

Check if the air-cooled transmission fluid cooler system is clogged according to the following procedure.

CAUTION:
Do not reuse the drained transmission fluid.

(1)Remove the transmission fluid cooler hose assembly.





(2)Blow air into the transmission fluid cooler hose assembly, and check that the air comes out from the opposite side.
(3)Blow air into the air-cooled transmission fluid cooler (A in the figure), and check that the air comes out from the opposite side (B in the figure).
(4)Install the parts, and replenish the transmission fluid to the specified quantity.

Q. Is the check result normal?

YES Go to Step 4.

NO Replace the part(s) having damage or other problems.

STEP 4. Thermo valve check

Refer to Testing and Inspection.

Q. Is the check result normal?

YES Go to Step 5.
NO Replace the thermo valve.
STEP 5. Coolant system clogging check

Check if the coolant system is clogged according to the following procedure.

CAUTION:
Do not reuse the drained coolant.

(1)Drain the coolant.

(2)Remove water feed hose A, water feed hose B and water return hose A.





(3)Blow air into the removed parts, and check that the air comes out from the opposite side.
(4)Blow air into the coolant outlet (A in the figure), and check that the air comes out from the opposite side (B in the figure).
(5)Install the parts, and replenish the coolant to the specified quantity.

Q. Is the check result normal?

YES Go to Step 6.

NO Replace the part(s) having damage or other problems.

STEP 6. Retest the system.

Q. Does a malfunction take place again?

YES Replace the CVT assembly.
NO Intermittent malfunction