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Home >> Honda >> 2002 >> Insight Automatic CVT >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Continuously Variable Automatic Transmission (CVT) >> CVT >> DTC Troubleshooting >> DTC P0603: Problem in TCM >> 2005-2006 Models

2005-2006 Models

NOTE:
  • Record all freeze data and review General Troubleshooting Information (see GENERAL TROUBLESHOOTING INFORMATION ) before you troubleshoot.
  • This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.
  1. Turn the ignition switch ON (II).
  2. Shift to the P or N position.
  3. Turn the ignition switch OFF.
  4. Disconnect TCM connector A (26P) for more than 5 seconds, then reconnect the connector.
  5. Turn the ignition switch ON (II), and wait for more than 5 seconds.
  6. Check that DTC P0603 recurs.

    Is DTC P0603 indicated? 

    1. YES  -Substitute a known-good TCM (see HOW TO TROUBLESHOOT CIRCUIT AT THE TCM ), then recheck. If the symptom/indication goes away with a known-good TCM, replace the original TCM.
    2. NO  -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at TCM.
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