Toyota Prius 2010 Repair Manual page 181

(b) Reconnect the A/C amplifier connector.
(c) Turn the power switch on (IG).
(d) Set the blower speed to LO.
(e) Measure the waveform between terminal L17-23 (BLW) of the A/C amplifier and body ground.
Tool setting
Vehicle condition
OK:
Waveform is as shown in the illustration.
HINT:
The waveform varies with the blower speed.
Text in Illustration
Component with harness connected
*1
2010 Toyota Prius
Item
1 V/DIV., 500 μs/DIV.
Power switch on (IG)
Blower set to LO
Content
Repair Manual