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

BME050218901212

DTC P0740 | TCC system malfunction
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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

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has FREEZE FRAME DATA been recorded? | Yes | Go to the next step.
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.
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.
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.
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/cm 2,43-69 psi}
Stall: 1,280-1,480 kPa {13.1-15.0 kgf/cm 2, 187-213 psi}
• Is the line pressure within specification?
(See Line Pressure Test.)
Yes
Go to the next step.
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.
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
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.
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].)
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].)
No | DTC troubleshooting completed.