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Communication Line Circuit Troubleshooting (With Navigation System)

  1. Disconnect navigation display unit connector A (5P).
  2. Disconnect climate control unit connector B (20P).
  3. Check for continuity between the following terminals of climate control unit connector B (20P) and navigation display unit connector A (5P).
    CLIMATE CONTROL UNIT CONNECTOR B-TO-NAVIGATION DISPLAY UNIT CONNECTOR A CONTINUITY TEST

    Climate Control Unit Connector B (20P) Terminal No. Navigation Display Unit Connector A (5P) Terminal No.
    8 2
    12 4
    14 3
    Fig 1: Checking Continuity
    G01165238Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity  ?

    1. YES  : Go to step 4.
    2. NO  : Repair any open in the wire(s) between the climate control unit and the navigation display unit.
  4. Check for continuity between the body ground and climate control unit connector B (20P) terminals No. 8, 12 and 14 individually.
    Fig 2: Checking Continuity Between The Body Ground And Climate Control Unit Connector B (20P) Terminals No. 8, 12 And 14 Individually
    G01165239Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity  ?

    1. YES  : Repair any short to body ground in the wire(s) between the climate control unit and the navigation display unit.
    2. NO  : Check for loose wires or poor connections at climate control unit connector B (20P) and at navigation display unit connector A (5P). If the connections are good, substitute a known-good climate control unit. If the problem still exists, replace the navigation display unit.
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