DTC P0A81-11: Hybrid/EV Battery Cooling Fan 1 Circuit Short to Ground [11/2015 - 12/2018]: Description
The battery cooling blower assembly speed is controlled by the hybrid vehicle control ECU. Power is supplied to the battery cooling blower assembly when the MREL terminal of the hybrid vehicle control ECU turns on the IGCT relay. The hybrid vehicle control ECU sends command signals (SI0) to the battery cooling blower assembly to adjust the fan speed to an appropriate speed for the HV battery temperature. The frequency (FP0) of the battery cooling blower assembly is sent to the hybrid vehicle control ECU via the battery voltage sensor as a monitor signal using serial communication.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate |
|---|---|---|---|---|---|
| P0A81-11 | Hybrid/EV Battery Cooling Fan 1 Circuit Short to Ground | Both of the following conditions are met:
(1 trip detection logic) |
|
Does not come on | Master Warning Light: Comes on |
| DTC No. | Data List |
|---|---|
| P0A81-11 |
|
The following items can be helpful when performing repairs:
Data List
- Hybrid Battery Temperature 1 to 3
- BATT Voltage
HINT:
"Hybrid Battery Cooling Fan 1 Frequency" is detected when the battery cooling blower assembly is operating and its value changes in proportion to the battery cooling blower assembly speed.