Toyota Prius 2010 Repair Manual page 58

DIAGNOSIS SYSTEM
1. DESCRIPTION
(a) Air conditioning system data and the Diagnostic Trouble Codes (DTCs) can be read through the Data Link
Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the Techstream to check
for malfunctions and perform troubleshooting.
2. CHECK DLC3
(a) Check the DLC3 .
3. LIST OF OPERATION METHODS
(a) By operating each of the air conditioning control switches as shown in the diagram below, it is possible to
enter diagnostic check mode.
2010 Toyota Prius Repair Manual