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 hybrid battery junction block assembly 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 charged, and a voltage above 2.5 V indicates that the HV battery is being discharged. The power management control ECU determines the amount of either charge or discharge amperage that is being received by the HV battery based on the signals that are input to terminal IB of the battery smart unit from the battery current sensor. The power management 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	Hybrid battery junction block assembly Battery smart unit

MONITOR DESCRIPTION

The power management control ECU detects malfunctions of the battery current sensor by monitoring MG1 and MG2 torque. If the power management control ECU detects a battery current sensor malfunction, the power management control ECU will illuminate the MIL and set a DTC.

MONITOR STRATEGY

Related DTCs	P0AC0 (INF 817): Current sensor malfunction (gain or offset)
Required sensors / components	Battery current sensor
Frequency of operation	Continuous
Duration	TMC's intellectual property
MIL operation	TMC's intellectual property
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not present	TMC's intellectual property
Other conditions belong to TMC's intellectual property	-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

-

COMPONENT OPERATING RANGE

Power management control ECU

DTC P0AC0 (INF 817) is not detected

CONFIRMATION DRIVING PATTERN

Connect the Techstream to the DLC3.
Turn the power switch on (IG) and turn the Techstream on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the power switch off.
Turn the power switch on (READY) and turn the Techstream on.
Perform the universal trip.
Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
Check that permanent DTCs are cleared.
Tech Tips
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.

INSPECTION PROCEDURE

PROCEDURE

CHECK DTC OUTPUT (HYBRID CONTROL)

Connect the Techstream to the DLC3.
Turn the power switch on (IG).
Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

Check if DTCs are output.

Result

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

Turn the power switch off.

B

GO TO DTC CHART (P0AFC-123) Click here

A

REPLACE HYBRID BATTERY JUNCTION BLOCK ASSEMBLY

Click here

NEXT
CLEAR DTC
1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
4. Read and record the DTCs and freeze frame data.
5. Clear DTCs and freeze frame data.
6. Turn the power switch off.
NEXT
PERFORM ROAD TEST

NEXT

CHECK DTC OUTPUT (HYBRID CONTROL)

Connect the Techstream to the DLC3.
Turn the power switch on (IG).
Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

Check if DTCs are output.

Result

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

Turn the power switch off.

B

REPLACE BATTERY SMART UNIT Click here

A

COMPLETED

HYBRID CONTROL SYSTEM, Diagnostic DTC:P0AC0-817