DTC P3085-188: Hybrid Battery Cooling System: Description
Some of the cool air for the rear cooling unit is used to cool the HV battery. There are two cooling passages for the HV battery. One takes in air from the interior and the other takes in cool air through the rear cooling unit.
By switching the HV battery cool down servo motor built into the rear cooling unit, the cooling systems are switched.
The hybrid vehicle control ECU calculates the blower speed and intake air temperature that are necessary for cooling based on information sent from the battery temperature sensor. Based on the calculation, the ECU determines that cool air from the rear conditioning should be used to cool the HV battery.
The battery cooling blower assembly (for upper and lower side) is controlled by the hybrid vehicle control ECU and battery smart unit. The damper is controlled by the air conditioning amplifier.
| DTC Code | DTC Detection Condition | Trouble Area |
|---|---|---|
| P3085-188 | When the HV battery cool down servo motor is at the A/C intake air position, the temperature of the cooling air in the HV battery remains high for more than about 10 to 20 hours in total. |
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