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Home >> Acura >> 2005 >> TSX Automatic >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> Audio System >> Symptom Troubleshooting >> Power switch will not turn ON (No information display and no sound)

Power switch will not turn ON (No information display and no sound)

NOTE: Check the vehicle battery condition first.
  1. Turn the ignition switch ON (II).
  2. Push the power switch ON to see if the audio unit turns ON.

    Does the power turn on? 

    YES  - Operation is normal.

    NO  - Go to step 3.

  3. Turn the ignition switch to LOCK (0).
  4. Check the No. 6 (10 A) and No. 32 (7.5 A) fuses in the under-dash fuse/relay box.

    Are the fuses OK? 

    YES  - Go to step 5.

    NO  - Replace the fuse(s) and recheck.

  5. Remove the audio-HVAC display module (see AUDIO-HVAC DISPLAY MODULE REMOVAL/INSTALLATION  ).
    NOTE: Eject all the discs before removing the audio unit to prevent damaging the CD player's load mechanism.
  6. Check that audio unit connector A (20P) is properly connected.

    Are the connectors connected properly? 

    YES  - Go to step 7.

    NO  - Reconnect the connector, and recheck the function.

  7. Measure the voltage between audio unit connector A (20P) terminal No. 10 and body ground.
    Fig 1: Measuring Voltage Between Audio Unit Connector A (20P) Terminal No. 10 And Body Ground
    G05489206Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  - Go to step 8.

    NO  - Repair open circuit or poor connection in the wire between No. 6 (10 A) fuse in the under-dash fuse/relay box and audio unit connector A (20P) terminal No. 10.

  8. Turn the ignition switch ON (II).
  9. Measure the voltage between the audio unit connector A (20P) terminal No. 2 and body ground.
    Fig 2: Measuring Voltage Between Audio Unit Connector A (20P) Terminal No. 2 And Body Ground
    G05489207Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  - Go to step 10.

    NO  - Repair open circuit or poor connection in the wire between No. 32 (7.5 A) fuse in the under-dash fuse/relay box and audio unit connector A (20P) terminal No. 2.

  10. Measure the voltage between audio unit connector A (20P) terminal No. 20 and body ground.
    Fig 3: Measuring Voltage Between Audio Unit Connector A (20P) Terminal No. 20 And Body Ground
    G05489208Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there less than 0.1 V? 

    YES  - Go to step 11.

    NO  - Repair open in the wire between audio unit connector A (20P) terminal No. 20 and body ground (G504).

  11. Turn the ignition switch to LOCK (0).
  12. Remove the audio unit (see AUDIO-HVAC DISPLAY PANEL REMOVAL/INSTALLATION  ).
  13. Connect the test harness (070AZ-SEAA200A with navigation or 070AZ-SEAA200B without navigation) to the radio test harness breakout box (07AAZ-SDAA100).
  14. Connect the test harness (070AZ-SEAA200A with navigation or 070AZ-SEAA200B without navigation) to the printed circuit board connector.

    With navigation 

    Fig 4: Connecting Test Harness To Radio Test Harness Breakout Box (With Navigation)
    G05489209Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Without navigation 

    Fig 5: Connecting Test Harness To Radio Test Harness Breakout Box (Without Navigation)
    G05489210Courtesy of AMERICAN HONDA MOTOR CO., INC.
  15. Connect the ohm meter to the special tool (07AAZ-SDAA100) POWER and GND terminals.
  16. Push the POWER button and check for continuity between the POWER and GND terminals.

    Is there continuity? 

    YES  - Replace the audio unit.

    NO  - Replace the audio-HVAC display panel.

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