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DTC P0744 [FS5A-EL]

id050221809700

DTC P0744 | Slip control malfunction
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DETECTION CONDITION | • With the engine running, all of the following conditions are met: - ATF temperature 20 °C {68 °F} or more - Secondary gear revolution speed 50 rpm or more - Differential gear case (output) revolution speed 35 rpm or more - Throttle opening angle 18.75% or less - Torque converter clutch (TCC) operating - Drive the vehicle at 3GR, 4GR, or 5GR, slip control operation - When any of the following conditions are met: • Revolution ratio of the forward clutch drum to secondary gear is 1.344 or less or 1.645 or more when driving in 2GR. • Revolution ratio of the forward clutch drum to secondary gear is 0.91 or less or 1.09 or more when driving in 3GR. • Revolution ratio of the forward clutch drum to secondary gear is 0.636 or less or 0.817 or more when driving in 4GR. - None of the following DTCs are present: P0706, P0707, P0708, P0712, P0713, P0715, P0720, P0751, P0752, P0753, P0756, P0757, P0758, P0761, P0762, P0763, P0766, P0767, P0768, P0771, P0772, P0773, P0791 Diagnostic support note: • This is a continuous monitor (CCM). • The MIL does not 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. • A PENDING CODE is not available. • FREEZE FRAME DATA is not available. • The AT warning light illuminates. • DTCs are stored in the TCM memory.
POSSIBLE CAUSE | • Forward clutch not engaged or slipped • Short to power supply in wiring harness between shift solenoid A terminal B and TCM terminal 1A • Shift solenoid A stuck on • Short to power supply in wiring harness between shift solenoid D terminal A and TCM terminal 1F • Shift solenoid D stuck on • Short to ground in wiring harness between shift solenoid E terminal A and TCM terminal 1H • Shift solenoid E stuck off • TCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has the FREEZE FRAME DATA been recorded? | Yes | Go to the next step.
No | Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2 | VERIFY DTCS • Turn the ignition switch to the LOCK position, then to the ON position. • Verify the DTCs in the TCM memory. • Are DTCs P0752, P0753, P0767, P0768, P0771, and P0773 output? | Yes | Go to the applicable DTC inspection.
No | Replace the forward clutch, then go to the next step.
3 | VERIFY TROUBLESHOOTING OF DTC P0744 COMPLETED • Make sure to reconnect all the disconnected connectors. • Clear the DTC from the memory using the WDS or equivalent. • Warm up the engine. • Drive the vehicle under the following conditions and make sure that gears shift smoothly from 1GR to 5GR. - ATF temperature (TFT PID): 20 °C {68 °F} or more - Drive in the D range - Throttle opening angle (THOP PID): 18.75% or less • Are any DTCs present? | Yes | Replace the TCM, then go to the next step. (See TCM REMOVAL/INSTALLATION [FS5A-EL].)
No | No concern is detected. Go to the next step.
4 | VERIFY AFTER REPAIR PROCEDURE • Perform the "After Repair Procedure". (See AFTER REPAIR PROCEDURE [FS5A-EL].) • Are any DTCs present? | Yes | Go to the applicable DTC inspection.
No | DTC troubleshooting completed.