Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Communication Line Circuit Troubleshooting (With Navigation System)
2004 Acura 3.5RLSECTION Communication Line Circuit Troubleshooting (With Navigation System)
WARNING: This page is about a different car, the 2003 Acura 3.2CL and 2002 Acura 3.2CL. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect navigation display unit connector A (5P).
- Disconnect climate control unit connector B (20P).
- 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 Is there continuity ?
- YES : Go to step 4.
- NO : Repair any open in the wire(s) between the climate control unit and the navigation display unit.
- 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
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity ?
- YES : Repair any short to body ground in the wire(s) between the climate control unit and the navigation display unit.
- 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.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.