DTC    P0AA6-611    Hybrid Battery Voltage System Isolation Fault

for Preparation Click here

DESCRIPTION

CAUTION:

1. Wear insulated gloves and pull out the service plug grip before inspection as procedures may require disconnecting high-voltage connectors.
   
2. Be sure to carry the removed service plug grip because other workers may install it by mistake.
   
3. Do not touch the high-voltage connectors or terminals for 10 minutes after the service plug grip is removed.
   

WIRING DIAGRAM

INSPECTION PROCEDURE

CAUTION:

1. Wear insulated gloves and pull out the service plug grip before inspection as procedures may require disconnecting high-voltage connectors.
   
2. Be sure to carry the removed service plug grip because other workers may install it by mistake.
   
3. Do not touch the high-voltage connectors or terminals for 10 minutes after the service plug grip is removed.
   

NOTICE:

1. After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work (Click here).
   
2. 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.
   
3. 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.
   
4. 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.
   
5. 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.

1. Using the intelligent tester to check if the CAN communication system is functioning normally.
   

   Result:

   Result	Proceed to
   CAN DTC is not output	A
   CAN DTC is output	B

B	GO TO CAN COMMUNICATION SYSTEM (Click here)

A

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.

1. Clear the DTCs (Click here).
   

2. Turn the power switch on (READY).
   

3. Prepare the vehicle according to the table below for 3 minutes.
   

   Item	Condition
   Blower speed	HI
   Temperature setting	MAX COLD
   A/C	ON

4. Turn the power switch off.
   

5. Remove the service plug grip.
   

   CAUTION:

   Do not touch the high-voltage connectors or terminals for 10 minutes after the service plug grip is removed.

   NOTICE:

   After removing the service plug grip, turning the power switch on (READY) may cause a malfunction. Do not turn the power switch on (READY) with the service plug grip removed.

6. Disconnect the connector from the compressor with motor assembly.
   

7. Using a megohmmeter, measure the resistance according to the value(s) in the table below.
   

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   E1-1 (PE) - Body ground	Always	2 MΩ or higher
   E1-2 (PB) - Body ground	Always	2 MΩ or higher

   Text in Illustration 

   *a	Component without harness connected (Compressor with Motor Assembly)

NG	REPLACE COMPRESSOR WITH MOTOR ASSEMBLY (Click here)

OK

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.

1. Reconnect the connector to the compressor with motor assembly.
   

2. Install the service plug grip.
   

3. Turn the power switch on (IG).
   

4. Set the A/C temperature to 25°C (77°F) and the blower switch to LO and then operate the compressor for 10 minutes to circulate the refrigerant and collect as much compressor oil as possible in the compressor.
   

5. Turn the power switch off.
   

6. Using a spot cooler or other tools, cool down the compressor with motor assembly for 30 minutes, or leave the vehicle overnight before inspection.
   

   NOTICE:

   Do not operate the compressor before inspection.

7. Remove the service plug grip.
   

   CAUTION:

   Do not touch the high-voltage connectors or terminals for 10 minutes after the service plug grip is removed.

   NOTICE:

   After removing the service plug grip, turning the power switch on (READY) may cause a malfunction. Do not turn the power switch on (READY) with the service plug grip removed.

8. Disconnect the connector from the compressor with motor assembly.
   

9. Using a megohmmeter, measure the resistance according to the value(s) in the table below.
   

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   E1-1 (PE) - Body ground	Always	3 MΩ or higher
   E1-2 (PB) - Body ground	Always	3 MΩ or higher

   NOTICE:

   If the results are out of the specified range, replace the compressor without operating it.

   Text in Illustration 

   *a	Component without harness connected (Compressor with Motor Assembly)

NG	REPLACE AIR CONDITIONING CYCLE (Click here)

OK
REPLACE COMPRESSOR WITH MOTOR ASSEMBLY (Click here)