DTC B1205: HVAC Control Unit Lost Communication with Gauge Control Module (VSP/NE message); DTC B1206: HVAC Control Unit Lost Communication with Gauge Control Module (ECT message); DTC B1207: HVAC Control Unit Lost Communication with Gauge Control Module (ILLUMI message)
NOTE:
If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN system diagnosis test mode A (see
TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A
).
- Clear the DTC with the HDS.
- Operate the heater-A/C control system in several modes.
- Check for DTCs using the HDS.
Is DTC B1205, B1206 and/or B1207 indicated?
YES -Go to step 4.
NO -Intermittent failure. The gauge control module and HVAC control unit are OK at this time. Check for CAN or B-CAN problems elsewhere. ■
- Check for DTCs using the HDS.
Is DTC B1060 or B2157 indicated?
YES -Perform the gauge control module input test (see GAUGE CONTROL MODULE INPUT TEST ). ■
NO -Go to step 5.
- Turn the ignition switch to LOCK (0).
- Disconnect the HVAC control unit 30P connector.
- Remove the gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ).
- Check for continuity between the HVAC control unit 30P connector terminal No. 11 and gauge control module connector B (14P) terminal No. 6.Fig 1: Checking Continuity Between HVAC Control Unit 30P Connector Terminal 11 And Gauge Control Module B (14P) 6
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES -Substitute a known-good HVAC control unit, then return to step 3 and recheck. If the problem is still present, replace the gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ). ■
NO -Repair open in the wire between the HVAC control unit and the gauge control module. ■