DTC P1742, P1744[LA4AX-EL (CD4E)]
id050207807400
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DTC P1742 |
Torque converter clutch solenoid malfunction |
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DTC P1744 |
Abnormal lock-up (slipping) |
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DETECTION CONDITION
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• P1742: PCM detects malfunction in electrical, mechanical, or oil pressure system of torque converter clutch solenoid
• P1744: PCM detects slipping during full engagement of torque converter clutch
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POSSIBLE CAUSE
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• TCC solenoid malfunction
• TCC malfunction
• Transaxle internal malfunction
• PCM malfunction
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Diagnostic procedure
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STEP |
INSPECTION |
ACTION |
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1
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VERIFY RELATED SERVICE INFORMATION AVAILABILITY
• Verify related Service Information availability.
• Is any related Service Information available?
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Yes
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Perform repair or diagnosis according to the available Service Information.
• If the vehicle is not repaired, go to the next step.
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No
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Go to the next step.
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2
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VERIFY DTCS
• Turn the ignition switch to the LOCK position, then to the ON position.
• Verify the DTCs in the PCM memory.
• Are except DTCs P1742 and P1744 output?
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Yes
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Go to the applicable DTC inspection.
(See DTC TABLE[LA4AX-EL (CD4E)].)
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No
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Go to the next step.
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3
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TORQUE CONVERTER CLUTCH SOLENOID OPERATION INSPECTION
• Connect the M-MDS to the DLC-2 and select the TCC PID.
• Using the M-MDS, verify the operation status of the torque converter clutch solenoid while driving the vehicle.
• Is the operation of the torque converter clutch solenoid normal?
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Yes
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Replace the torque converter, then go to the next step.
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No
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Replace the solenoid body assembly, then go to the next step.
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4
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VERIFY TROUBLESHOOTING OF DTC P1742 OR P1744 COMPLETED
• Make sure to reconnect all the disconnected connectors.
• Clear the DTC using the M-MDS.
• Perform the “After Repair Procedure”.
• Are any DTCs present?
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Yes
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Replace the PCM, then go to the next step.
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No
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Go to the next step.
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5
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VERIFY DTCS
• Are except DTCs P1742 and P1744 output?
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Yes
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Go to the applicable DTC inspection.
(See DTC TABLE[LA4AX-EL (CD4E)].)
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No
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DTC troubleshooting completed.
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