DTC B1205: A/C Control Panel Lost Communication with Gauge Control Module (VSP/NE message); DTC B1206: A/C Control Panel Lost Communication with Gauge Control Module (ENGTEMP message); DTC B1207: A/C Control Panel Lost Communication with Gauge Control Module (ILLUMI message)

WARNING: This page is about a different car, the 2006 Honda Odyssey and 2005 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.

Turn the ignition switch OFF then ON.
Turn the A/C control system on and operate several functions (A/C ON/OFF, air mix and blend door operations, temperature settings etc.).
Check for DTCs using the HDS.
Is DTC indicated?
1. YES -
  - DTC B1205 indicated: go to step 4.
  - DTC B1206 or B1207 indicated: go to step 5.
2. NO - Intermittent failure, the gauge control module and A/C control panel are OK at this time.
Check for DTCs using the HDS.
Is DTC B1060 indicated?
1. YES - Perform the gauge control module self test procedure (see SELF-DIAGNOSTIC FUNCTION ).
2. NO - The A/C control panel is faulty, replace the A/C control panel.
Disconnect the A/C control panel connector A (22P).
Remove the gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ).
Check for continuity between the No. 10 terminal of A/C control panel connector A (22P) and the No. 25 terminal of the gauge control module 30P connector.

Fig 1: Checking Continuity Between No. 10 Terminal Of A/C Control Panel Connector A (22P) And No. 25 Terminal Of Gauge Control Module 30P Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?
1. YES - Check for loose wire or poor connections at A/C control panel connector A (22P) and at the gauge control module 30P connector. If the connections are good, substitute a known-good A/C control panel and/or gauge control module, and recheck. If the symptom/indication goes away, replace the original A/C control panel and/or gauge control module.
2. NO - Repair open in the wire between the A/C control panel and the gauge control module.