Navigation Communication Line Circuit Troubleshooting
WARNING: This page is about a different car, the 2008 Honda Pilot, 2007 Honda Pilot, and 2006 Honda Pilot. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect navigation unit connector A (20P).
- Disconnect climate control unit connector A (20P).
- Check for continuity between the following terminals of climate control unit connector A (20P) and navigation unit connector A (20P).
20P 20P
No. 17 No. 4
No. 18 No. 15
No. 19 No. 14
Fig 1: Checking For Continuity Between Terminals Of Climate Control Unit Connector A (20P) & Navigation Unit Connector A (20P)Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES - Go to step 4.
NO - Repair any open in the wire(s) between the climate control unit and the navigation unit.
- Check for continuity between body ground and climate control unit connector A (20P) terminals No. 17, 18 and 19 individually.Fig 2: Checking For Continuity Between Body Ground & Climate Control Unit Connector A (20P) Terminals No. 17, 18 & 19
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 unit.
NO - Check for loose wire or poor connections at climate control unit connector A (20P) and at the navigation unit connector A (20P). If the connections are good, substitute a known-good climate control unit and/or navigation unit, and recheck. If the symptom/indication goes away, replace the original climate control unit and/or navigation unit.