P0AC6
DTC P0AC6
CIRCUIT DESCRIPTION
The following DTCs are for the battery temperature sensors located in the energy storage box (ESB) on each battery:
- P0ACB is for the hybrid battery 3 temperature sensor performance.
- P0AC6 is for the hybrid battery 2 temperature sensor performance.
- P0A9C is for the hybrid battery 1 temperature sensor performance.
Battery temperature sensors allow the energy storage control module (ESCM) to monitor the temperature of the batteries in the energy storage box. The module applies 5 volts to internal input resistors that are connected to the signal circuits of the battery temperature sensors. The module provides ground to the battery temperature sensors through the low reference circuit. The ESCM monitors the voltage drops across the battery temperature sensors and uses the inputs for hybrid calculations. When the battery temperatures are cold, the resistances of the sensors are high and the voltage signals are high. When the battery temperatures are hot, the resistances of the sensors are low and the voltage signals are low.
DTC DESCRIPTORS
This diagnostic procedure supports the following DTCs:
- DTC P0A9C Hybrid Battery 1 Temperature Sensor Performance
- DTC P0AC6 Hybrid Battery 2 Temperature Sensor Performance
- DTC P0ACB Hybrid Battery 3 Temperature Sensor Performance
CONDITIONS FOR RUNNING THE DTC
- The ignition is ON.
- The engine has been running for 30 seconds.
CONDITIONS FOR SETTING THE DTC
- P0ACB is set when the ESCM has determined that the battery 3 temperature sensor value differs by more than 15 degrees from the average of the 3 sensors.
- P0AC6 is set when the ESCM has determined that the battery 2 temperature sensor value differs by more than 15 degrees from the average of the 3 sensors.
- P0A9C is set when the ESCM has determined that the battery 1 temperature sensor value differs by more than 15 degrees from the average of the 3 sensors.
CONDITIONS FOR CLEARING THE DTC
- The DTC will become history if the ESCM no longer detects a fault.
- The history DTC will clear after 40 fault-free ignition cycles.
- The DTC can be cleared with a scan tool.
TEST
