DTC P0ACA (974)
DTC P0ACA (974): HV Battery Temperature Sensor 3A Circuit
General Description
Seven battery module temperature sensors are attached to the battery module in the battery pack, and the battery condition monitor module A continuously monitors the battery module temperature. If the battery condition monitor module A input voltage from battery module temperature sensor 3(A) is out of the specified voltage for a set time, a malfunction is detected and a DTC is stored.
Monitor Execution, Sequence, Duration, DTC Type
| Execution | Continuous |
| Sequence | None |
| Duration | 3.0 seconds or more |
| DTC Type | Two drive cycles, MIL on, POWER SYSTEM indicator on, 12 volt battery charging system indicator off |
Enable Conditions
| Condition | Minimum | Maximum |
|---|---|---|
| Elapsed time since the 12 volt battery voltage reaches to a specified value after the vehicle condition is turned to the ON mode | 50 milliseconds | - |
| 12 volt battery voltage | 8.0 V | - |
Malfunction Threshold
One of these conditions is met:
- The battery module temperature sensor 3(A) output voltage is 4.83 V or more and 4.93 V or less for at least 3.0 seconds.
- The battery module temperature sensor 3(A) output voltage is 0.07 V or more and 0.72 V or less for at least 3.0 seconds.
Possible Cause
- Battery module temperature sensor 3(A) failure
- Battery condition monitor module A failure
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the battery condition monitor module A memory. If the malfunction returns in the next (second) drive cycle, the MIL and the POWER SYSTEM indicator comes on and a Confirmed DTC and the freeze data are stored.
Conditions for clearing the DTC
The MIL and the POWER SYSTEM indicator are cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL and the POWER SYSTEM indicator, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the 12 volt battery.