Hybrid Battery Control System

DTC P3009 HIGH VOLTAGE POWER SHORT CIRCUIT

CIRCUIT DESCRIPTION

Detection Item:

The DTC is output if there is insulation trouble with the high-voltage circuits in the air conditioning system. Insulation trouble with the electric inverter compressor or A/C inverter assembly may be the cause. Any oil other than ND-OIL 11 may have entered the refrigeration cycle.

The motor driven with high-voltage is built into the electrical compressor and is cooled directly with refrigerant. Compressor oil (ND-OIL 11) with high insulation performance is used because a leakage of electrical power may occur if regular compressor oil (ND-OIL 8) is used.

NOTE:
- Electrical insulation performance may decrease significantly if even a small amount of oil other than ND-OIL 11 is used (or enters) in the refrigeration cycle, causing the DTC to be output.
- If other is accidentally used and a DTC is output, collect the oil in the refrigeration cycle into the compressor and replace it with ND-OIL 11 to increase the ND-OIL 11 ration 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.

CAUTION: Wear insulated gloves and pull out the service plug grip before inspection as procedures may require disconnecting high-voltage connectors.

Step 1:

Step 2:

Step 3:

Step 3 (Continued):

INSPECTION PROCEDURE