P0A85

DTC P0A85 HYBRID BATTERY PACK COOLING FAN 1

CIRCUIT DESCRIPTION

DTC Detection Condition:

The blower motor controller regulates the voltage of the battery blower assembly. The blower motor controller has fins made of aluminum. The exhaust air from the HV battery assembly that flows through the quarter vent duct cools the blower motor controller, which is installed in the quarter vent duct.

The current flows from the FCTL1 terminal of the battery ECU to the relay coil of the battery blower relay No. 1 and as the contact point of the relay closes, the power is supplied to the battery blower assembly. When a fan actuation signal is transmitted from the battery ECU, the blower motor controller adjusts voltage (VM) which is applied to the battery blower assembly in order to get the requested fan speed. The adjusted voltage is also transmitted to the VM terminal of the battery ECU in the form of a monitoring signal. The blower motor controller corrects the voltage at the blower motor by monitoring voltage at the +B terminal of the battery blower assembly.

Wiring Diagram:

Step 1:

Step 2 - 4:

Step 5 - 6:

Step 7 - 8:

Step 9 - 10:

Step 11 - 12:

Step 13:

Step 14 - 15:

INSPECTION PROCEDURE