Toyota Prius 2010 Repair Manual page 390

(a) Replace the blower motor with a known good one and check if the same problem occurs again
OK:
Same problem does not occur.
NG
REPLACE SOLAR VENTILATION ECU
OK
END (BLOWER MOTOR WAS DEFECTIVE)
CHECK HARNESS AND CONNECTOR (SOLAR VENTILATION ECU - SOLAR VENTILATION
7.
RELAY)
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE SOLAR VENTILATION ECU
2010 Toyota Prius
(a) Disconnect the solar ventilation ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
L22-12 (BLWB) - L104-4
L22-12 (BLWB) - Body ground
Text in Illustration
Front view of wire harness connector
*1
(to Solar Ventilation ECU)
Front view of wire harness connector
*2
(to Solar Ventilation Relay)
Condition Specified Condition
Always Below 1 Ω
Always 10 kΩ or higher
.
Repair Manual