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 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 hybrid vehicle 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 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	Abnormal battery current sensor characteristics An abnormality in the battery current sensor characteristics is detected based on the relationship between hybrid system power consumption and battery power output. (1 trip detection logic)	Hybrid battery junction block assembly Battery smart unit

DTC No.

INF Code

DTC Detection Condition

Trouble Area

P0AC0

817

Abnormal battery current sensor characteristics

An abnormality in the battery current sensor characteristics is detected based on the relationship between hybrid system power consumption and battery power output.

(1 trip detection logic)

Hybrid battery junction block assembly
Battery smart unit

Related Data List
DTC No.	Data List
P0AC0-817	Power Resource IB

CAUTION / NOTICE / HINT

Tech Tips

After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.

Drive the vehicle for approximately 10 minutes according to the freeze frame data items "Vehicle Spd", "Accelerator Degree", "Power Resource IB", "M(MG2) Trq Exec Val" and "G(MG1) Trq Exec Val".

PROCEDURE

CHECK DTC OUTPUT (HYBRID CONTROL)

Connect the GTS to the DLC3.
Turn the ignition switch to 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 ignition switch off.

GO TO DTC CHART (P0AFC-123) Click here

REPLACE HYBRID BATTERY JUNCTION BLOCK ASSEMBLY

Click here

NEXT
CLEAR DTC
1. Connect the GTS to the DLC3.
2. Turn the ignition switch to 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 ignition switch off.
NEXT
PERFORM ROAD TEST
1. Perform a road test.
  
  CAUTION:
  
  Perform this road test only in an appropriate safe location, in accordance with local laws.
NEXT

CHECK DTC OUTPUT (HYBRID CONTROL)

Connect the GTS to the DLC3.
Turn the ignition switch to 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 ignition switch off.

COMPLETED

REPLACE BATTERY SMART UNIT Click here