Toyota Prius 2010 Repair Manual page 160

Electrical insulation performance may decrease significantly if even a small amount of oil other than ND-OIL 11 is
used (or enters) in the refrigerant cycle, causing the DTC to be output.
If other oil is accidentally used and a DTC is output, collect the oil in the refrigerant cycle into the compressor
and replace it with ND-OIL 11 to increase the ND-OIL 11 ratio amount.
Replace the main components (evaporator, condenser, and compressor) if a large amount of oil other than ND-
OIL 11 enters the system. Failing to do so may cause electrical insulation performance to remain low, causing
the DTC to be output.
The hybrid control system and air conditioning system output DTCs separately. Inspect DTCs following the flow
chart for the hybrid control system first if any DTCs from those systems are output simultaneously.
HINT:
If it can be confirmed that any compressor oil other than ND-OIL 11 has been used in the vehicle, replace the
air conditioning cycle.
PROCEDURE
1. CHECK CAN COMMUNICATION SYSTEM
(a) Using the Techstream to check if the CAN communication system is functioning normally.
Result:
CAN DTC is not output
CAN DTC is output
B
GO TO CAN COMMUNICATION SYSTEM
A
2. INSPECT COMPRESSOR WITH MOTOR ASSEMBLY
CAUTION:
Because the compressor has a high-voltage circuit, wear insulated gloves and pull out the service plug grip to
cut off the high-voltage circuit before inspection.
(a) Clear the DTCs
(b) Turn the power switch on (IG).
(c) Prepare the vehicle according to the table below for 3 minutes.
Blower speed
Temperature setting
2010 Toyota Prius
Result
.
Item
Proceed to
A
B
Condition
HI
MAX COLD
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