Climate Control/Navigation Communication Line Circuit Troubleshooting
  1. Operate the climate control system in several modes.
Is the climate control system OK?
YES -
Go to Step 2 .
NO -
Do the self-diagnostic with the HDS or the climate control unit. ■
  1. Do the Navi system link.
Is the Air-Con icon red?
YES -
Go to Step 3 .
NO -
Go to Step 9 .
  1. Turn the ignition switch OFF.
  1. Disconnect navigation unit connector A (20P).
  1. Disconnect the climate control unit 32P connector.
  1. Check for continuity between the following terminals of the climate control unit 32P connector and navigation unit connector A (20P).
    32P:
    20P:
    No. 5
    No. 4
    No. 6
    No. 14
    No. 21
    No. 15

Is there continuity?
YES -
Go to Step 7 .
NO -
Repair open in the wire(s) between the climate control unit and the navigation unit.■