With Manufacturer's Scan Tool

CHECK DTC

a. Connect the intelligent tester or Techstream to the DLC3.
b. Turn the ignition switch ON.
c. Turn the tester on.
d. Enter the following menus:
1. Intelligent tester - Select: DIAGNOSIS / OBD/MOBD / AIR CONDITIONER / DTC INFO.
2. Techstream - Select: Body Electrical / Air conditioner / Trouble Codes.

e. Read the DTCs.