DTC B2969: Climate Control Unit Lost Communication with MICU (WIPSW message)

WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. However, it is still accessible from the selected car via links, so may be relevant.

Clear the DTCs with the HDS.
Turn the ignition switch to LOCK (0) and then back to ON (II).
Do the self-diagnostic function with the HDS.
Check for DTCs.
Is DTC B2969 indicated?

YES -Go to step 5.

NO -Intermittent failure, check for loose wires or poor connections in the gauge control module and climate control unit circuit.
Select B-CAN CONTROL UNITS INFORMATION in the BODY ELECTRICAL menu.
Select CHECK CONNECTED CONTROL UNITS in the B-CAN CONTROL UNITS INFORMATION menu.
Is the gauge control module detected?

YES -Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit (see ).

NO -Go to step 7.
Disconnect under-dash fuse/relay box connector Q (16P).
Disconnect the gauge control module 32P connector.
Check for continuity between under-dash fuse/relay box connector Q (16P) terminal No. 3 and the gauge control module 32P connector terminal No. 17.

Fig 1: Checking Continuity Between Under-Dash Fuse/Relay Box Connector Q (16P) Terminal No. 3 And The Gauge Control Module 32P Connector Terminal No. 17
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Go to the gauge control module input test.

NO -Repair an open in the wire between the MICU and the gauge control module.