HYBRID CONTROL SYSTEM, Diagnostic DTC:P0AC0-817

DTC Code	DTC Name
P0AC0-817	Hybrid Battery Pack Current Sensor Circuit Range / Performance

DESCRIPTION

The battery current sensor, which is located in the HV battery junction block on the positive side of the HV battery, detects the amperage that flows to and from the HV battery. The battery smart unit receives a voltage of between 0 and 5 V that is in proportion to the amperage flowing in the cable. This voltage goes into the IB terminal from the battery current sensor. A battery current sensor output voltage below 2.5 V indicates that the HV battery is being discharged, and a voltage above 2.5 V indicates that the HV battery is being charged. The hybrid vehicle control ECU determines the amount of either charge or discharge amperage that is being received by the HV battery assembly based on the signals that are input to terminal IB of the battery smart unit from the battery current sensor. The hybrid vehicle control ECU also calculates the SOC (state of charge) of the HV battery based on the accumulated amperage.

DTC No.	INF Code	DTC Detection Condition	Trouble Area
P0AC0	817	HV battery current sensor performance problem	HV battery junction block Battery smart unit

INSPECTION PROCEDURE

PROCEDURE

CHECK DTC OUTPUT (HV)

Check if DTCs are output.

Result

Result	Proceed to
P0AC0-817 only is output.	A
P0AFC-123 is also output.	B

GO TO DTC CHART Click here

REPLACE HV BATTERY JUNCTION BLOCK
1. Replace the HV battery junction block Click here.
NEXT
CLEAR DTC
1. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
2. Read and record the DTCs and freeze frame data.
3. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
4. Clear DTCs and freeze frame data.
NEXT
PERFORM ROAD TEST
1. Perform a road test.
NEXT

CHECK DTC OUTPUT (HV)

Check if DTCs are output.

Result

Result	Proceed to
P0AC0-817 is not output.	A
P0AC0-817 is output again.	B

REPLACE BATTERY SMART UNIT Click here

COMPLETED