DTC Indicator I: An Open In The Air Mix Control Motor Circuit

WARNING: This page is about a different car, the 2006 Acura MDX, 2005 Acura MDX, 2004 Acura MDX, and 2003 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

Test the air mix control motor (see AIR MIX CONTROL MOTOR TEST ).
Does the air mix control motor test OK?
1. YES - Go to step 2.
2. NO - Replace the air mix control motor.
Disconnect the air mix control motor 7P connector.
Disconnect climate control unit connector B (26P).

Check for continuity between the following terminals of climate control unit connector B (26P) and the air mix control motor 7P connector.

AIR MIX CONTROL MOTOR 7P CONNECTOR TERMINALS REFERENCE

26P:	7P:
No. 1	No. 5
No. 3	No. 7
No. 21	No. 3
No. 25	No. 2
No. 26	No. 1

Fig 1: Checking For Continuity Between Terminals Of Climate Control Unit Connector B

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Check for loose wires or poor connections at climate control unit connector B (26P) and at the air mix control motor 7P connector. If the connections are good, substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit.
NO - Repair any open in the wire(s) between the climate control unit and the air mix control motor.