Toyota Prius 2010 Repair Manual page 186

(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
A19-1 (B) - 1H-10 (PTC1)
A19-2 (B) - 1H-8 (PTC2)
A19-3 (B) - 1H-9 (PTC3)
A19-1 (B) - Body ground
A19-2 (B) - Body ground
A19-3 (B) - Body ground
Text in Illustration
Front view of wire harness connector
*1
(to PTC Heater Assembly)
Front view of wire harness connector
*2
(to Engine Room Relay Block and Junction Block (Integration Relay))
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
4. CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - INTEGRATION RELAY)
2010 Toyota Prius
Condition
Always
Always
Always
Always
Always
Always
(a) Disconnect the A/C amplifier connector.
Specified Condition
Below 1 Ω
Below 1 Ω
Below 1 Ω
10 kΩ or higher
10 kΩ or higher
10 kΩ or higher
Repair Manual