Navigation Cannot Control A/C

Navigation cannot control A/C

NOTE:
- Always check the connectors for poor connections or loose terminals.
- Before troubleshooting, get the navigation system anti-theft codes.
- After troubleshooting, enter the navigation system anti-theft codes.
- Verify that the correct navigation unit is installed for this model. Go into the Diagnostic mode and use "Version".

1. Go into the Diagnostic Mode and use the "Navi System Link" check.

Is "Air-con" icon red?

YES - Do the climate control system troubleshooting.

NO - Check for an open or short to ground between navigation unit connector A (20P) terminals No. 4, No. 14, No. 15 and climate control unit connector A (16P) terminals No. 16, No. 15, No. 8. If OK, check the climate control system for normal operation. If the climate control system works properly, substitute a known-good display unit and recheck.