DIAGNOSTIC ITEM 21: Diagnose when the scan tool cannot receive the data sent by A/C control panel < vehicles with A/C > or heater control panel < vehicles without A/C >: Notes

WARNING: This page is about a different car, the 2015 Mitsubishi Lancer. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: When servicing a CAN bus line, ground yourself by touching a metal object such as an unpainted water pipe. If you fail to do so, a component connected to the CAN bus line may be damaged.

Fig 1: CAN-B Communication Circuit Diagram

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.