Navigation Communication Line Circuit Troubleshooting
Navigation Communication Line Circuit Troubleshooting1. 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 climate control unit.
2. Do the Navi system link.
Is the Air-Con icon red?
YES - Go to step 3.
NO - Go to step 9.
3. Turn the ignition switch to LOCK (0).
4. Disconnect navigation unit connector F (5P).
5. Disconnect climate control unit connector A (32P).
6. Check for continuity between the following terminals of climate control unit connector A (32P) and navigation unit connector F (5P).
Is there continuity?
YES - Go to step 7.
NO - Repair open in the wire(s) between the climate control unit and the navigation unit.
7. Check for continuity between body ground and climate control unit connector A (32P) No. 28, 29, and No. 30 terminals individually.
Is there continuity?
YES - Repair short to body ground in the wire(s) between the climate control unit and the navigation unit.
NO - Go to step 8.
8. Reconnect climate control unit connector A (32P).
9. Disconnect navigation unit connector F (5P).
10. Connect climate control unit connector A (32P) No. 28, 29, and No. 30 terminals with a jumper wire.
11. Turn the ignition switch to ON (II).
12. Press the RECIRCULATION and OFF buttons.
Does the RECIRCULATION indicator turn on?
YES - Do the Unit check with the navigation system.
NO - Substitute a known-good climate control unit, and recheck. If the symptom goes away, replace the original climate control unit.