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 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 recognition does not work" Voice Guidance Cannot Be Heard, Is Broken Up, or There Is Static in the navigation system symptom troubleshooting.
NO - Go to step 9.
3. Turn the ignition switch to LOCK (0).
4. Disconnect navigation unit connector F (5P).
5. Disconnect the climate control unit 36P connector.
6. Check for continuity between the following terminals of the climate control unit 36P connector 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 navigation unit connector F (5P) No. 2, 3, and 4 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 the climate control unit 36P connector.
9. Disconnect navigation unit connector F (5P).
10. Connect navigation unit connector F (5P) No. 2, 3, and 4 terminals with a jumper wire.
11. Turn the ignition switch to ON (II).
12. Press and hold the AUTO and OFF buttons.
Does the VENT and HEAT indicator turn on?
YES - Do the navigation unit check.
NO - Substitute a known-good climate control unit, and recheck. If the symptom goes away, replace the original climate control unit.