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PROBABLE CAUSE The torque converter is faulty. CORRECTIVE ACTION Replace the torque converter, or the torque converter and the transmission, and update the PCM with the HDS. NOTE: You must update the PCM to complete the repair.REPAIR PROCEDURE B Follow the IN-WARRANTY EXCHANGE steps in service bulletin 90-009, Automatic Transmission In- Warranty Exchange Program, to order a remanufactured A/T, replace the failed A/T, and return the failed A/T core. 1. Remove the transmission: • Refer to page 14-203 of the 2003–04 MDX Service Manual, or • Online, enter keyword A/T REM, and select A/T Removal from the list. 2. Clean the transmission cooler. Refer to service bulletin 89-015, ATF Cooler Cleaner. 3. Install a remanufactured transmission: • Refer to page 14-215 of the 2003–04 MDX Service Manual, or • Online, enter keyword A/T INSTALL, and select A/T Installation from the list. 4. Update the PGM-FI software using HDS version 1.018.016 or later (see SOFTWARE INFORMATION). Refer to service bulletin 01-026, Updating the ECM/PCM. 5. Do the idle learn procedure: • Make sure all electrical items (A/C, audio unit, defogger, lights, etc.) are turned off. • Start the engine and let it run until it reaches its normal operating temperature (cooling fan cycles twice). • Let the engine idle with the throttle fully closed for 10 minutes.