LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Acura >> 2004 >> TL Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Idle Control System >> Alternator FR Signal Circuit Troubleshooting >> 2006 model
April 5, 2026: LEMON Manuals is launched! Read the announcement.

2006 model

  1. Start the engine, and let it idle.
  2. Monitor the ALTERNATOR in the DATA LIST with the HDS.
  3. Check if the indicated percentage changes when the headlight switch is turned on.

    Does the percentage vary? 

    1. YES  -The alternator signal circuit is OK.
    2. NO  -Go to step 4.
  4. Turn the headlight switch and ignition switch OFF.
  5. Jump the SCS line with the HDS.
  6. Disconnect the alternator 4P connector.
  7. Disconnect ECM/PCM connector A (31P).
  8. Check for continuity between body ground and ECM/PCM connector terminal A12.
    Fig 1: Checking Continuity Between Body Ground And ECM/PCM Connector Terminal A12
    G03659677Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  -Repair short in the wire between the ECM/PCM (A12) and the alternator.
    2. NO  -Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/ PCM (see HOW TO TROUBLESHOOT CIRCUITS AT THE ECM/PCM ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see ECM/PCM REPLACEMENT ).
scientia non olet · About LEMON Manuals