P0AC2

P313 HYBRID BATTERY CONTROL: HYBRID BATTERY SYSTEM: P0ABF-123, P0AC1-123, P0AC2-123: Hybrid Battery Pack Current Sensor Circuit
P0AC2-123 - Hybrid Battery Pack Current Sensor "A" Circuit High

DESCRIPTION

- The battery current sensor, which is mounted on the positive cable side of the HV battery assembly, detects the amperage that flows into the HV battery. The battery smart unit inputs a voltage, which varies between 0 and 5 V in proportion to the amperage, into the IB terminal from the battery current sensor. An output voltage of the battery current sensor below 2.5 V indicates that the HV battery is being discharged, and above 2.5 V indicates that the HV battery is being charged. The hybrid vehicle control ECU determines the charging and discharging amperage of the HV battery based on the signals that are input to its IB terminal from the battery smart unit, and calculates the SOC (state of charge) of the HV battery through the accumulated amperage.

MONITOR DESCRIPTION

If the battery smart unit detects malfunction in the battery current sensor, the hybrid vehicle control ECU illuminates the MIL and set a DTC.

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

COMPONENT OPERATING RANGE

CONFIRMATION DRIVING PATTERN

1. Connect the Techstream to the DLC3.

2. Turn the ignition switch to ON and turn the Techstream on.

3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

4. Turn the ignition switch off.

5. Turn the ignition switch to ON (READY) and turn the Techstream on.

6. Perform the universal trip.

7. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

8. Check that permanent DTCs are cleared.

HINT
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.

WIRING DIAGRAM

INSPECTION PROCEDURE

CAUTION:
- Before inspecting the high-voltage system, take safety precautions to prevent electrical shocks, such as wearing insulated gloves and removing the service plug grip. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
- After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals.
HINT
At least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

PROCEDURE

1. CHECK DTC OUTPUT (DTC P0AFC-123 IS OUTPUT) P0A7F

B -- GO TO DTC P0AFC-123 P0AFC-123
A -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (NO. 2 BATTERY PACK WIRE) P0A85

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (NO. 2 BATTERY PACK WIRE)
OK -- Continue to next step.

3. CHECK BATTERY SMART UNIT (VIB VOLTAGE)

CAUTION:
Be sure to wear insulated gloves and protective goggles.

(a) Disconnect the cable from the negative (-) battery terminal.

(b) Check that the service plug grip is not installed.

NOTICE:
After removing the service plug grip, do not turn the ignition switch ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(c) Remove the battery cover Removal.

(d) Remove the battery smart unit Removal.

NOTICE:
Do not disconnect the battery smart unit connector.

(e) Connect the cable to the negative (-) battery terminal.

(f) Turn the ignition switch to ON.

(g) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Text in Illustration

NOTICE:
If the ignition switch is turned ON with the service plug grip removed, DTC P0A0D-350 for the interlock switch system will be stored. If this DTC is output, clear the DTC using the Techstream Hybrid Battery System.

NG -- REPLACE BATTERY SMART UNIT Removal
OK -- Continue to next step.

4. CHECK BATTERY SMART UNIT (IB VOLTAGE)

CAUTION:
Be sure to wear insulated gloves and protective goggles.

(a) Disconnect the cable from the negative (-) battery terminal.

(b) Check that the service plug grip is not installed.

NOTICE:
After removing the service plug grip, do not turn the ignition switch ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(c) Remove the battery cover Removal.

(d) Remove the battery smart unit Removal.

HINT
Do not disconnect the battery smart unit connector.

(e) Connect the cable to the negative (-) battery terminal.

(f) Turn the ignition switch to ON.

(g) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Text in Illustration