Navigation Communication Line Circuit Troubleshooting

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Disconnect navigation unit connector A (32P).
Disconnect the climate control unit 30P connector.

Check for continuity between the following terminals of the climate control unit 30P connector and navigation unit connector A (32P).

30 Pin Connector Terminal No.	32 Pin Connector Terminal No.
24	4
25	21
26	20

Fig 1: Checking Continuity Between Climate Control Unit 30P Connector And Navigation Unit Connector A (32P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Go to step 4.

NO -Repair open in the wire(s) between the climate control unit and the navigation unit. ■

Check for continuity between body ground and climate control unit 30P connector terminals No. 24, 25, and 26 individually.

Fig 2: Checking Continuity Between Body Ground And Climate Control Unit 30P Connector Terminals 24, 25, & 26
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Repair short to body ground in the wire(s) between the climate control unit and the navigation unit. ■

NO -Check for loose wires or poor connections at the climate control unit 30P connector and the navigation unit connector A (32P). 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 (see CLIMATE CONTROL UNIT REMOVAL/INSTALLATION ) and/or navigation unit (see NAVIGATION UNIT REMOVAL/INSTALLATION ). ■