Toyota Prius 2010 Repair Manual page 60

5. SENSOR CHECK (DTC CHECK)
(a) Start the engine and warm it up.
(b) Perform the indicator check.
HINT:
After the indicator check is completed, the system enters DTC check mode automatically.
2010 Toyota Prius
assembly "AUTO" switch and "Recirculation/Fresh" switch
simultaneously. Hold both switches until the indicator check screen
appears.
Text in Illustration
*1 A/C Control Assembly
(d) The indicator check is automatically performed when panel diagnosis
is activated. Check that the indicators light up and go off 4 times at 1-
second intervals continuously.
The sensor check automatically starts when the indicator check is
completed.
Press the "OFF" switch to cancel the check mode.
Text in Illustration
*1 A/C Control Assembly
(c) Read the DTC displayed on the A/C control assembly.
NOTICE:
In sensor check mode, which is automatically entered after indicator
check mode, troubleshooting may be partially performed. Be sure to
perform the sensor check again.
Repair Manual