P0BA1

HYBRID BATTERY CONTROL: HYBRID BATTERY SYSTEM: P0B3D-123, P0B42-123, P0B47-123, P0B4C-123, P0B51-123, P0B56-123, P0B5B-123, P0B60-123, P0B65-123, P0B6A-123, P0B6F-123, P0B74-123, P0B79-123, P0B7E-123, P0B83-123, P0B88-123, P0B8D-123, P0B92-123, P0B97-123, P0B9C-123, P0BA1-123, P308A-123: Hybrid Battery Voltage Sensor "A" Circuit Low
P308A-123 - Hybrid Battery Voltage Sensor All Circuits Low

DESCRIPTION

- Refer to the circuit description for DTC P0A80-123 P0A80.





HINT
Values below 2.0 V may not be indicated in the data list due to the substitution of a fail-safe value.

MONITOR DESCRIPTION

The battery smart unit monitors a voltage of the battery blocks to detect an open malfunction in internal battery voltage sensor circuits of the battery smart unit and the wire harness between each battery block and battery smart unit. If a voltage at one of the battery blocks is below a standard level or of all the battery blocks is within a specified range, the battery smart unit judges that there is an open in the internal sensor circuit(s) or wire harness. The hybrid vehicle control ECU will then illuminate the MIL and set a DTC.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





COMPONENT OPERATING RANGE





INSPECTION PROCEDURE

CAUTION:
- Before inspecting the high-voltage system, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. 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
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

PROCEDURE

1. CHECK DTC OUTPUT (DTC P0A1F-123 IS OUTPUT)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.

(d) Check if DTCs are output.

Result:

DTC P0A1F-123 is output.

YES -- GO TO INSPECTION PROCEDURE RELEVANT TO OUTPUT DTC
NO -- Continue to next step.

2. CHECK CONNECTOR CONNECTION CONDITION

CAUTION:
Be sure to wear insulated gloves.

(a) Remove the service plug grip. Removal

(b) Remove the luggage compartment trim cover front. Removal

(c) Disconnect the frame wire. Removal

(d) Remove the battery bracket sub-assembly. Removal

(e) Check the connection of connector z9 of the battery smart unit.





OK:

The connector is connected securely and there are no contact problems.

NG -- CONNECT SECURELY
OK -- Continue to next step.

3. REPLACE BATTERY SMART UNIT

Components

NEXT -- Continue to next step.

4. CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.

(d) Clear the DTCs.

NEXT -- Continue to next step.

5. RECONFIRM DTC OUTPUT

(a) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.

(b) Check if DTCs are output.

Result:

DTC P0AFA-123 is output.

YES -- REPLACE HV BATTERY Components

NO -- COMPLETED