DTC P0740 (ISRAELI SPECS.) [JA5A-EL]


DTC P0740	TCC system malfunction
DETECTION CONDITION	• If the RPM difference between crankshaft (engine speed signal) and reverse clutch drum (input/turbine speed sensor signal) exceeds the pre-programmed value, the TCM determines that there is a malfunction. Diagnostic support note: • This is continuous monitor (CCM). • The MIL illuminates if the TCM detects the above malfunction conditions in two consecutive drive cycles. • PENDING CODE is available. • FREEZE FRAME DATA is available. • The HOLD indicator light does not flash. • The DTC is stored in the TCM memory.
POSSIBLE CAUSE	• ATF level low. • Deteriorated ATF • Stuck TCC solenoid valve and pressure control solenoid • Low line pressure • Oil pump malfunction • Stuck control valve • Torque convert clutch malfunction • TCM malfunction


STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has FREEZE FRAME DATA been recorded?	Yes	Go to the next step.
1		No	Record the FREEZE FRAME PID DATA on the repair order, then go to the next step.
2	VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Verify related Service Bulletins and/or on-line repair 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.
2		No	Go to the next step.
3	INSPECT ATF CONDITION • Turn the ignition switch to the LOCK position. • Inspect the ATF condition. - Clear red: Normal - Milky: Water mixed in fluid - Reddish brown: Deteriorated ATF • Is it normal? (See Automatic Transaxle Fluid (ATF) Condition Inspection.)	Yes	Go to the next step.
3		No	If the ATF color is milky or reddish brown, replace the ATF, then go to Step 5. (See AUTOMATIC TRANSAXLE FLUID (ATF) REPLACEMENT [JA5A-EL].)
4	INSPECT ATF LEVEL • Start the engine. • Warm up the ATX. • Is the ATF level within specification? (See Automatic Transaxle Fluid (ATF) Level Inspection.)	Yes	Go to the next step.
4		No	Adjust the ATF level, then go to Step 9. (See Automatic Transaxle Fluid (ATF) Level Inspection.)
5	INSPECT LINE PRESSURE • Start the engine. • Measure the line pressure. Specification Idle: 290-490 kPa {3.0-4.9 kgf/cm²,43-69 psi} Stall: 1,280-1,480 kPa {13.1-15.0 kgf/cm², 187-213 psi} • Is the line pressure within specification? (See Line Pressure Test.)	Yes	Go to the next step.
5		No	All ranges: Replace or overhaul the oil pump or control valve body, then go to Step 10. Any ranges: Replace or overhaul automatic transaxle, then go to Step 10. (See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [JA5A-EL].)
6	CLICK TEST OF SOLENOID VALVES • Turn the ignition switch to the LOCK position. • Disconnect the terminal component No.1 (12-pin). • Apply battery voltage to terminal component No.1 (12-pin) terminals (transaxle case side). - TCC solenoid vale: B - Pressure control solenoid: D • Verify the click sounds of the TCC solenoid valve and pressure control solenoid. • Is there click sound?	Yes	Go to the next step.
6		No	Replace the TCC solenoid valve or pressure control solenoid, then go to Step 10. (See CONTROL VALVE BODY REMOVAL/INSTALLATION [JA5A-EL].)
7	INSPECT DIFFERENCE BETWEEN ENGINE SPEED AND TURBINE SPEED • Inspect the difference between the engine speed and the turbine speed during TCC operation in 5GR. • Drive the vehicle under the following condition. - TR switch position: D range - Gear position: 5GR - TCC solenoid valve: ON • Is the difference between the engine speed (RPM PID) and the turbine speed normal? Difference Less than 99 rpm	Yes	Go to Step
7		No	Go to the next step.
8	INSPECT OPERATION OF EACH VALVE AND EACH SPRING • Remove the control valve body. • Disassemble the control valve body. • Is each valve operation and return spring normal?	Yes	Replace the torque converter, then go to the next step.
8		No	Replace the control valve body, then go to the next step. (See CONTROL VALVE BODY REMOVAL/INSTALLATION [JA5A-EL].)
9	VERIFY TROUBLESHOOTING OF DTC P0740 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the TCM memory using the WDS or equivalent. • Start the engine. • Warm up the ATX. • Drive the vehicle under the following condition for 10 s or more. - Vehicle speed (VSS PID): Within 10-87 km/h {6-54 mph} - Gear position: 5GR - TR switch position: D range - TCC solenoid valve: ON • Is there pending code?	Yes	Replace the TCM, then go to the next step. (See TCM REMOVAL/INSTALLATION [JA5A-EL].)
9		No	Go to the next step.
10	VERIFY AFTER REPAIR PROCEDURE • Perform the "After Repair Procedure". (See AFTER REPAIR PROCEDURE [JA5A-EL].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [JA5A-EL].)
10		No	DTC troubleshooting completed.