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 function with the HDS or the climate control unit. ■
  1. Do the Navi system link.
Is the Air-Con or TALK/BACK icon red?
YES -
  • If Air-con icon is red, go to Step 3 .
  • If TALK/BACK icon is red, go to ‘‘voice control does not work/respond'' in the navigation system symptom troubleshooting. ■
NO -
Go to Step 9 .
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect navigation unit connector B (32P).
  1. Disconnect climate control unit connector B (12P).
  1. Check for continuity between the following terminals of climate control unit connector B (12P) and navigation unit connector B (32P).
    12P:
    32P:
    No. 7
    No. 20
    No. 9
    No. 21
    No. 8
    No. 4

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