Diagnostic Procedure

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

DTC B1086 DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	INSPECT AIRFLOW MODE ACTUATOR OPERATION Disconnect the airflow mode actuator connector Apply battery positive voltage and connect the ground to the airflow mode actuator terminals A and B, and then inspect the airflow mode actuator Does the airflow mode actuator operate?	Yes	Connect the connector, then go to Step 3.
1		No	Go to the next step
2	INSPECT AIRFLOW MODE MAIN LINK OPERATION Remove the airflow mode actuator Operate the airflow mode main link manually Does the airflow mode main link operate smoothly?	Yes	Replace the airflow mode actuator See AIRFLOW MODE ACTUATOR INSPECTION [FULL-AUTO AIR CONDITIONER] .
2		No	Replace the airflow mode main link, airflow mode sub link, and the airflow mode crank.
3	INSPECT AIRFLOW MODE ACTUATOR CIRCUIT FOR OPEN CIRCUIT OR SHORT TO GROUND Disconnect the climate control unit connector Apply battery positive voltage and connect the ground to the climate control unit connector terminals 1M and 1K, and then inspect the airflow mode actuator Does the airflow mode actuator operate?	Yes	Inspect the connection of the climate control unit connector
3		No	Repair the wiring harness