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

PROBABLE CAUSES

Thermal deterioration of the CVT fluid
Damaged wiring harness and connectors
Malfunction of the CVT fluid temperature sensor
Clogged coolant system
Clogged air-cooled CVT fluid cooler system
Malfunction of the thermo valve
Malfunction of CVT-ECU
Malfunction of CVT assembly

DIAGNOSIS PROCEDURE

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

Check the deterioration level of the CVT fluid.

note

The CVT 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 CVT fluid.

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

	Go to Step 2.

	Replace the CVT fluid.

STEP 2. M.U.T.-III data list

Item 5: CVT fluid temperature sensor (Refer to Data List Reference Table

)

Q. Is the check result normal?

	Go to Step 3.

	NO : Diagnosis code No.P0711, P0712, P0713: Diagnose the CVT fluid temperature sensor.

STEP 3. Air-cooled CVT fluid cooler system clogging check

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

caution

Do not reuse the drained CVT fluid.

(1)Remove the CVT fluid cooler hose assembly.

(2)Blow air into the CVT fluid cooler hose assembly, and check that the air comes out from the opposite side.
(3)Blow air into the air-cooled CVT 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 CVT fluid to the specified quantity.

Q. Is the check result normal?

Go to Step 4.

Replace the part(s) having damage or other problems.

STEP 4. Thermo valve check

Refer to

Q. Is the check result normal?

	Go to Step 5.

	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?

Go to Step 6.

Replace the part(s) having damage or other problems.

STEP 6. Retest the system.

Q. Does a malfunction take place again?

	Replace the CVT assembly.

	Intermittent malfunction