DTC P0744:00 [FS5A-EL]

DTC P0744:00	TCC slip control malfunction
DETECTION CONDITION	• The TCM detects that revolution ratio of the input shaft speed to intermediate revolution is 1.09 or more, or 0.91 or less when the following conditions are met. ― 3GR ― TCC slip control: On • The TCM detects that revolution ratio of the input shaft speed to intermediate revolution is 0.817 or more, or 0.636 or less when the following conditions are met. ― 4GR or 5GR ― TCC slip control: On Diagnostic support note • The MIL does not illuminate. • The AT warning light illuminates if the TCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the TCM. • PENDING CODE is not available. • FREEZE FRAME DATA is not available. • The DTC is stored in the TCM memory.
POSSIBLE CAUSE	• Deteriorated ATF • ATF level low • Solenoid valve malfunction ― Pressure control solenoid A ― Shift solenoid B ― Shift solenoid C ― Shift solenoid D ― Shift solenoid E • Line pressure low • Oil pump malfunction • Forward clutch slipping • 2-4 brake band slipping • 3-4 clutch slipping • Primary control valve body malfunction • TCM malfunction

DTC P0744:00

TCC slip control malfunction

DETECTION CONDITION

• The TCM detects that revolution ratio of the input shaft speed to intermediate revolution is 1.09 or more, or 0.91 or less when the following conditions are met.

― 3GR

― TCC slip control: On

• The TCM detects that revolution ratio of the input shaft speed to intermediate revolution is 0.817 or more, or 0.636 or less when the following conditions are met.

― 4GR or 5GR

― TCC slip control: On

Diagnostic support note

• The MIL does not illuminate.

• The AT warning light illuminates if the TCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the TCM.

• PENDING CODE is not available.

• FREEZE FRAME DATA is not available.

• The DTC is stored in the TCM memory.

POSSIBLE CAUSE

• Deteriorated ATF

• ATF level low

• Solenoid valve malfunction

― Pressure control solenoid A

― Shift solenoid B

― Shift solenoid C

― Shift solenoid D

― Shift solenoid E

• Line pressure low

• Oil pump malfunction

• Forward clutch slipping

• 2-4 brake band slipping

• 3-4 clutch slipping

• Primary control valve body malfunction

• TCM malfunction

STEP	INSPECTION	ACTION
1	VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related repair information available?	Yes	Perform repair or diagnosis according to the available repair information. • If the vehicle is not repaired, go to the next step.
No	Go to the next step.
2	VERIFY THAT NO OTHER DTCs ARE PRESENT • Switch the ignition to off, and then switch the ignition to ON. • Verify the DTCs recorded in the TCM (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [FS5A-EL].) • Are any DTCs other than P0744:00 recorded?	Yes	Go to the applicable DTC inspection (See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [FS5A-EL].)
No	Go to the next step.
3	INSPECT ATF CONDITION • Inspect the ATF condition. (See AUTOMATIC TRANSAXLE FLUID (ATF) INSPECTION [FS5A-EL].) • Is it normal?	Yes	Go to the next step.
No	Replace the ATF, then go to Step 9. (See AUTOMATIC TRANSAXLE FLUID (ATF) REPLACEMENT [FS5A-EL])
4	INSPECT ATF LEVEL • Inspect the ATF level. (See AUTOMATIC TRANSAXLE FLUID (ATF) INSPECTION [FS5A-EL].) • Is it normal?	Yes	Go to the next step.
No	Add ATF to the specified level, then go to Step 9 (See AUTOMATIC TRANSAXLE FLUID (ATF) INSPECTION [FS5A-EL])
5	INSPECT SOLENOID VALVE • Inspect the following solenoid valves: (See SOLENOID VALVE INSPECTION [FS5A-EL].) ― Pressure control solenoid A ― Shift solenoid B ― Shift solenoid C ― Shift solenoid D ― Shift solenoid E • Is there any malfunction?	Yes	Replace the solenoid valve, then go to Step 9. (See SOLENOID VALVE REMOVAL/INSTALLATION [FS5A-EL].)
No	Go to the next step.
6	INSPECT LINE PRESSURE • Perform the “Line Pressures Test”. (See MECHANICAL SYSTEM TEST [FS5A-EL].) • Is there any malfunction?	Yes	Repair or replace malfunctioning part according to test result, then go to Step 9.
No	Go to the next step.
7	INSPECT STALL SPEED • Perform the “Stall Test”. (See MECHANICAL SYSTEM TEST [FS5A-EL].) • Is there any malfunction?	Yes	Repair or replace malfunctioning part according to test result, then go to Step 9.
No	Go to the next step.
8	INSPECT PRIMARY CONTROL VALVE BODY • Remove the primary control valve body. (See CONTROL VALVE BODY REMOVAL/INSTALLATION [FS5A-EL].) • Disassemble the primary control valve body. • Inspect the following parts: ― Shift valve ― Return spring ― Hydraulic passage • Is there any malfunction?	Yes	Repair or replace malfunctioning part according to inspection result, then go to next step.
No	Replace the transaxle, then go to the next step. (See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [FS5A-EL].)
9	VERIFY DTC TROUBLESHOOTING COMPLETED • Make sure to reconnect all the disconnected connectors. • Clear the DTC using the M-MDS. • Perform the following procedure to ensure that the DTC has been resolved: 1. Start the engine. 2. Warm up the engine to normal operating temperature. 3. Drive the vehicle under the following conditions for 1 s or more. ― 3GR ― Accelerator pedal position: 12% or less ― Vehicle speed: 34 km/h {21 mph} or more 4. Drive the vehicle under the following conditions for 1 s or more. ― 4GR ― Accelerator pedal position: 12% or less ― Vehicle speed: 43 km/h {27 mph} or more • Is the same DTC present?	Yes	Replace the TCM, then go to the next step. (See TCM REMOVAL/INSTALLATION [FS5A-EL].)
No	Go to the next step.
10	VERIFY NO DTCs ARE PRESENT • Perform the “Reading DTCs Procedure”. (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [FS5A-EL].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [FS5A-EL].)
No	DTC troubleshooting completed.

STEP

INSPECTION

ACTION

VERIFY RELATED REPAIR INFORMATION AVAILABILITY

• Verify related Service Information availability.

• Is any related repair information available?

Yes

Perform repair or diagnosis according to the available repair information.

• If the vehicle is not repaired, go to the next step.

Go to the next step.

VERIFY THAT NO OTHER DTCs ARE PRESENT

• Switch the ignition to off, and then switch the ignition to ON.

• Verify the DTCs recorded in the TCM

(See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [FS5A-EL].)

• Are any DTCs other than P0744:00 recorded?

Yes

Go to the applicable DTC inspection

(See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [FS5A-EL].)

Go to the next step.

INSPECT ATF CONDITION

• Inspect the ATF condition.

(See AUTOMATIC TRANSAXLE FLUID (ATF) INSPECTION [FS5A-EL].)

• Is it normal?

Yes

Go to the next step.

Replace the ATF, then go to Step 9.

(See AUTOMATIC TRANSAXLE FLUID (ATF) REPLACEMENT [FS5A-EL])

INSPECT ATF LEVEL

• Inspect the ATF level.

(See AUTOMATIC TRANSAXLE FLUID (ATF) INSPECTION [FS5A-EL].)

• Is it normal?

Yes

Go to the next step.

Add ATF to the specified level, then go to Step 9

(See AUTOMATIC TRANSAXLE FLUID (ATF) INSPECTION [FS5A-EL])

INSPECT SOLENOID VALVE

• Inspect the following solenoid valves:

(See SOLENOID VALVE INSPECTION [FS5A-EL].)

― Pressure control solenoid A

― Shift solenoid B

― Shift solenoid C

― Shift solenoid D

― Shift solenoid E

• Is there any malfunction?

Yes

Replace the solenoid valve, then go to Step 9.

(See SOLENOID VALVE REMOVAL/INSTALLATION [FS5A-EL].)

Go to the next step.

INSPECT LINE PRESSURE

• Perform the “Line Pressures Test”.

(See MECHANICAL SYSTEM TEST [FS5A-EL].)

• Is there any malfunction?

Yes

Repair or replace malfunctioning part according to test result, then go to Step 9.

Go to the next step.

INSPECT STALL SPEED

• Perform the “Stall Test”.

(See MECHANICAL SYSTEM TEST [FS5A-EL].)

• Is there any malfunction?

Yes

Repair or replace malfunctioning part according to test result, then go to Step 9.

Go to the next step.

INSPECT PRIMARY CONTROL VALVE BODY

• Remove the primary control valve body.

(See CONTROL VALVE BODY REMOVAL/INSTALLATION [FS5A-EL].)

• Disassemble the primary control valve body.

• Inspect the following parts:

― Shift valve

― Return spring

― Hydraulic passage

• Is there any malfunction?

Yes

Repair or replace malfunctioning part according to inspection result, then go to next step.

Replace the transaxle, then go to the next step.

(See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [FS5A-EL].)

VERIFY DTC TROUBLESHOOTING COMPLETED

• Make sure to reconnect all the disconnected connectors.

• Clear the DTC using the M-MDS.

• Perform the following procedure to ensure that the DTC has been resolved:

1. Start the engine.

2. Warm up the engine to normal operating temperature.

3. Drive the vehicle under the following conditions for 1 s or more.

― 3GR

― Accelerator pedal position: 12% or less

― Vehicle speed: 34 km/h {21 mph} or more

4. Drive the vehicle under the following conditions for 1 s or more.

― 4GR

― Accelerator pedal position: 12% or less

― Vehicle speed: 43 km/h {27 mph} or more

• Is the same DTC present?

Yes

Replace the TCM, then go to the next step.

(See TCM REMOVAL/INSTALLATION [FS5A-EL].)

Go to the next step.

VERIFY NO DTCs ARE PRESENT

• Perform the “Reading DTCs Procedure”.

(See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [FS5A-EL].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [FS5A-EL].)

DTC troubleshooting completed.