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Home › Acura › 2011 › ZDX › Repair and Diagnosis › Heating, Ventilation & A/C (HVAC) › HVAC Control Systems › Climate Control › HVAC Switch Communication Line Circuit Troubleshooting › With Navigation

With Navigation

  1. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
  2. Disconnect audio-navigation and HVAC switch panel connector A (20P).
  3. Check for continuity between audio-navigation and HVAC switch panel connector A (20P) terminal No. 3 and body ground,
    Fig 1: Checking For Continuity Between Audio-Navigation And HVAC Switch Panel Connector A (20P) Terminal No. 3 And Body Ground
    G08076309Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step 4.

    NO  -Check for an open in the wire between the audio-navigation and HVAC switch panel and body ground. If the wire is OK, check for poor body ground at G501 (see CONNECTOR TO FUSE/RELAY BOX INDEX ).

  4. If the following switches do not work, go to the step indicated below respectively.
    • DRIVER'S SIDE MODE CONTROL button, go to step 5.
    • DRIVER'S SIDE TEMPERATURE CONTROL switch, go to step 5.
    • DRIVER'S SIDE AUTO button, go to step 5.
    • PASSENGER'S SIDE MODE CONTROL button, go to step  16.
    • PASSENGER'S SIDE TEMPERATURE CONTROL switch, go to step  16.
    • PASSENGER'S SIDE AUTO button, go to step  16.
    • ON/OFF button, go to step  27.
    • FAN CONTROL button, go to step  27.
    • SYNC button, go to step  27.
    • WINDSHIELD DEFROST button, go to step  38.
    • RECIRCULATION button, go to step  38.
    • AIR CONDITIONING button, go to step  38.
    • REAR WINDOW DEFOGGER/MIRROR DEFOGGER button, go to step  38.
  5. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
  6. Measure the voltage between climate control unit connector B (24P) terminals and body ground as shown in the illustration.
    Fig 2: Measuring Voltage Between Climate Control Unit Connector B (24P) Terminals And Body Ground
    G08076310Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 5 V? 

    YES  -Go to step 7.

    NO  -Go to step  11.

  7. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
  8. Disconnect audio-navigation and HVAC switch panel connector B (32P).
  9. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
  10. Measure the voltage between body ground and audio-navigation and HVAC switch panel connector B (32P) terminals No. 10, No. 24, No. 25, and No. 26 individually.
    Fig 3: Measuring Voltage Between Body Ground And Audio-Navigation And HVAC Switch Panel Connector B (32P) Terminals
    G08076311Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 5 V? 

    YES  -Substitute a known-good audio-navigation and HVAC switch panel, and recheck. If the symptom goes away, replace the original audio-navigation and HVAC switch panel (see AUDIO-NAVIGATION AND HVAC SWITCH PANEL REMOVAL/INSTALLATION ).

    NO  -Repair an open in the wires between the climate control unit and the audio-navigation and HVAC switch panel.

  11. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
  12. Disconnect climate control unit connector B (24P) and audio-navigation and HVAC switch panel connector B (32P).
  13. Check for continuity between body ground and climate control unit connector B (24P) terminals No. 17, No. 18, No. 19 and No. 20 individually.
    Fig 4: Checking For Continuity Between Body Ground And Climate Control Unit Connector B (24P) Terminals
    G08076312Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair a short to body ground in the wire(s) between the climate control unit and the audio-navigation and HVAC switch panel.

    NO  -Go to step 14.

  14. Reconnect audio-navigation and HVAC switch panel connector B (32P).
  15. Check for continuity between body ground and audio-navigation and HVAC switch panel connector B (32P) terminals No. 10, No. 24, No. 25, and No. 26 individually. Do not press the switch or the button.
    Fig 5: Checking For Continuity Between Body Ground And Audio-Navigation And HVAC Switch Panel Connector B (32P) Terminals
    G08076313Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Substitute a known-good audio-navigation and HVAC switch panel, and recheck. If the symptom goes away, replace the original audio-navigation and HVAC switch panel (see AUDIO-NAVIGATION AND HVAC SWITCH PANEL REMOVAL/INSTALLATION ).

    NO  -Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit (see CLIMATE CONTROL UNIT REMOVAL/INSTALLATION  ).

  16. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
  17. Measure the voltage between body ground and climate control unit connector B (24P) terminals No. 5, No. 6, No. 7 and No. 8 individually.
    Fig 6: Measuring Voltage Between Body Ground And Climate Control Unit Connector B (24P) Terminals
    G08076314Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 5 V? 

    YES  -Go to step 18.

    NO  -Go to step  22.

  18. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
  19. Disconnect audio-navigation and HVAC switch panel connector B (32P).
  20. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
  21. Measure the voltage between body ground and audio-navigation and HVAC switch panel connector B (32P) terminals No. 13, No. 14, No. 29 and No. 30 individually.
    Fig 7: Measuring Voltage Between Body Ground And Audio-Navigation And HVAC Switch Panel Connector B (32P) Terminals
    G08076315Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 5 V? 

    YES  -Substitute a known-good audio-navigation and HVAC switch panel, and recheck. If the symptom goes away, replace the original audio-navigation and HVAC switch panel (see AUDIO-NAVIGATION AND HVAC SWITCH PANEL REMOVAL/INSTALLATION ).

    NO  -Repair an open in the wires between the climate control unit and the audio-navigation and HVAC switch panel.

  22. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
  23. Disconnect climate control unit connector B (24P) and audio-navigation and HVAC switch panel connector B (32P).
  24. Check for continuity between body ground and climate control unit connector B (24P) terminals No. 5, No. 6, No. 7, and No. 8 individually.
    Fig 8: Checking For Continuity Between Body Ground And Climate Control Unit Connector B (24P) Terminals
    G08076316Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair a short to body ground in the wire(s) between the climate control unit and the audio-navigation and HVAC switch panel.

    NO  -Go to step 25.

  25. Reconnect audio-navigation and HVAC switch panel connector B (32P).
  26. Check for continuity between body ground and audio-navigation and HVAC switch panel connector B (32P) terminals No. 13, No. 14, No. 29, and No. 30 individually. Do not press the switch or the button.
    Fig 9: Checking For Continuity Between Body Ground And Audio-Navigation And HVAC Switch Panel Connector B (32P) Terminals
    G08076317Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Substitute a known-good audio-navigation and HVAC switch panel, and recheck. If the symptom goes away, replace the original audio-navigation and HVAC switch panel (see AUDIO-NAVIGATION AND HVAC SWITCH PANEL REMOVAL/INSTALLATION ).

    NO  -Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit (see CLIMATE CONTROL UNIT REMOVAL/INSTALLATION  ).

  27. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
  28. Measure the voltage between body ground and climate control unit connector B (24P) terminals No. 21, No. 22, No. 23, and No. 24 individually.
    Fig 10: Measuring Voltage Between Body Ground And Climate Control Unit Connector B (24P) Terminals
    G08076318Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 5 V? 

    YES  -Go to step 29.

    NO  -Go to step  33.

  29. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
  30. Disconnect audio-navigation and HVAC switch panel connector B (32P).
  31. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
  32. Measure the voltage between body ground and audio-navigation and HVAC switch panel connector B (32P) terminals No. 11, No. 12, No. 27, and No. 28 individually.
    Fig 11: Measuring Voltage Between Body Ground And Audio-Navigation And HVAC Switch Panel Connector B (32P) Terminals
    G08076319Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 5 V? 

    YES  -Substitute a known-good audio-navigation and HVAC switch panel, and recheck. If the symptom goes away, replace the original audio-navigation and HVAC switch panel (see AUDIO-NAVIGATION AND HVAC SWITCH PANEL REMOVAL/INSTALLATION ).

    NO  -Repair an open in the wires between the climate control unit and the audio-navigation and HVAC switch panel.

  33. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
  34. Disconnect climate control unit connector B (24P) and audio-navigation and HVAC switch panel connector B (32P).
  35. Check for continuity between body ground and climate control unit connector B (24P) terminals No. 21, No. 22, No. 23, and No. 24 individually.
    Fig 12: Checking For Continuity Between Body Ground And Climate Control Unit Connector B (24P) Terminals
    G08076320Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair a short to body ground in the wire(s) between the climate control unit and the audio-navigation and HVAC switch panel.

    NO  -Go to step 36.

  36. Reconnect audio-navigation and HVAC switch panel connector B (32P).
  37. Check for continuity between body ground and audio-navigation and HVAC switch panel connector B (32P) terminal No. 11, No. 12, No. 27, and No. 28 individually. Do not press the switch or the button.
    Fig 13: Checking For Continuity Between Body Ground And Audio-Navigation And HVAC Switch Panel Connector B (32P) Terminal
    G08076321Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Substitute a known-good audio-navigation and HVAC switch panel, and recheck. If the symptom goes away, replace the original audio-navigation and HVAC switch panel (see AUDIO-NAVIGATION AND HVAC SWITCH PANEL REMOVAL/INSTALLATION ).

    NO  -Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit (see CLIMATE CONTROL UNIT REMOVAL/INSTALLATION  ).

  38. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
  39. Measure the voltage between body ground and climate control unit connector B (24P) terminals No. 9, No. 10, No. 11, and No. 12 individually.
    Fig 14: Measuring Voltage Between Body Ground And Climate Control Unit Connector B (24P) Terminals
    G08076322Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 5 V? 

    YES  -Go to step 40.

    NO  -Go to step  44.

  40. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
  41. Disconnect audio-navigation and HVAC switch panel connector B (32P).
  42. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
  43. Measure the voltage between body ground and audio-navigation and HVAC switch panel connector B (32P) terminals No. 15, No. 16, No. 31, and No. 32 individually.
    Fig 15: Measuring Voltage Between Body Ground And Audio-Navigation And HVAC Switch Panel Connector B (32P) Terminals
    G08076323Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 5 V? 

    YES  -Substitute a known-good audio-navigation and HVAC switch panel, and recheck. If the symptom goes away, replace the original audio-navigation and HVAC switch panel (see AUDIO-NAVIGATION AND HVAC SWITCH PANEL REMOVAL/INSTALLATION ).

    NO  -Repair an open in the wires between the climate control unit and the audio-navigation and HVAC switch panel.

  44. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
  45. Disconnect climate control unit connector B (24P) and audio-navigation and HVAC switch panel connector B (32P).
  46. Check for continuity between body ground and climate control unit connector B (24P) terminals No. 9, No. 10, No. 11, and No. 12 individually.
    Fig 16: Checking For Continuity Between Body Ground And Climate Control Unit Connector B (24P) Terminals
    G08076324Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair a short to body ground in the wire(s) between the climate control unit and the audio-navigation and HVAC switch panel.

    NO  -Go to step 47.

  47. Reconnect audio-navigation and HVAC switch panel connector B (32P).
  48. Check for continuity between body ground and audio-navigation and HVAC switch panel connector B (32P) terminals No. 15, No. 16, No. 31, and No. 32 individually. Do not press the switch or the button.
    Fig 17: Checking For Continuity Between Body Ground And Audio-Navigation And HVAC Switch Panel Connector B (32P) Terminals
    G08076325Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Substitute a known-good audio-navigation and HVAC switch panel, and recheck. If the symptom goes away, replace the original audio-navigation and HVAC switch panel (see AUDIO-NAVIGATION AND HVAC SWITCH PANEL REMOVAL/INSTALLATION ).

    NO  -Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit (see CLIMATE CONTROL UNIT REMOVAL/INSTALLATION  ).

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