NO.23 TRANSAXLE OVERHEATS [FS5A-EL]

id050308802800

23

Transaxle overheats
DESCRIPTION
•  Burnt smell emitted from transaxle.
•  Smoke is emitted from transaxle.
POSSIBLE CAUSE
•  The malfunction is restricted to the hindrance of coolant at the oil cooler. In addition, overheating of the transaxle may be caused by a malfunction of the TFT sensor.
1.  Burnt (TCC)
•  Line pressure low
•  Control valve body malfunction
2.  Oil cooler malfunction (Foreign material mixed in ATF)
3.  TFT sensor malfunction
4.  Excessive amount of ATF
5.  Torque converter malfunction
Note
•  Before following the troubleshooting steps, make sure that the Automatic Transaxle On-Board Diagnostic and Automatic Transaxle Basic Inspection are conducted. (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [FS5A-EL].) (See BASIC INSPECTION [FS5A-EL].)

Diagnostic procedure

STEP

INSPECTION

ACTION
1
Inspect for bending, damage, corrosion or kinks of the oil cooler pipes.
Are the oil cooler pipes normal?
Yes
Go to the next step.
No
Repair or replace any malfunctioning parts according to the inspection result.
2
Perform the stall test.
(See MECHANICAL SYSTEM TEST [FS5A-EL].)
Is the stall speed normal?
Yes
Go to the next step.
No
Repair or replace any malfunctioning parts according to the inspection result.
3
Disconnect the TCM connector.
Is the resistance between the ground terminal at the TCM connector and the body ground less than 5.0 ohms?
Yes
Go to the next step.
No
Repair or replace the wiring harness for a possible open circuit.
Reconnect the TCM connector.
4
Inspect the value at the following TCM PID using the M-MDS.
(See ON-BOARD DIAGNOSTIC SYSTEM PID/DATA MONITOR INSPECTION [FS5A-EL].)
•  LPS
Is the PID value normal?
Yes
Overhaul the control valve body and repair or replace any malfunctioning parts.
(See Automatic Transaxle Workshop Manual FS5A-EL.)
If any problem remains, overhaul the transaxle and repair or replace any malfunctioning parts.
(See Automatic Transaxle Workshop Manual FS5A-EL.)
No
Repair or replace any malfunctioning parts according to the inspection result.
5
•  Verify the test results.
―  If normal, return to the diagnostic index to service any additional symptoms.
―  If the malfunction remains, inspect the related Service Information and perform repair or diagnosis.
•  If the vehicle is repaired, troubleshooting is completed.
•  If the vehicle is not repaired or additional diagnostic information is not available, replace the TCM.