P0B3D

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 description of 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 the voltage of the battery blocks to detect an open malfunction in the internal battery voltage sensor circuits of the battery smart unit and the wire harness between each battery block and the battery smart unit. If the voltage at one of the battery blocks is below the standard level or the voltage 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 then illuminates the MIL and sets 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. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.
HINT
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

PROCEDURE

1. CHECK FOR DTCS (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





B -- GO TO DTC CHART (P0A1F-123) Hybrid Battery System
A -- Continue to next step.

2. CHECK CONNECTOR CONNECTION CONDITION

CAUTION:
Be sure to wear insulated gloves.

(a) Remove the HV battery Removal.





(b) Check the connection of connector z32 of the battery smart unit.

OK:

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

HINT
For the removal and installation procedures related to the battery smart unit connector inspection, Removal.

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

3. REPLACE BATTERY SMART UNIT

HINT
For the removal and installation procedures related to the battery smart unit, Removal.

NEXT -- Continue to next step.

4. CLEAR DTC (HV)

(a) Install the HV battery Installation.

(b) Connect the Techstream to the DLC3.

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

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

(e) Clear the DTCs and freeze frame data.

(f) Perform a symptom simulation test.

NEXT -- Continue to next step.

5. RECONFIRM DTC OUTPUT (HV)

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

(b) Check if DTCs are output.

Result





B -- REPLACE HV BATTERY Removal

A -- END (BATTERY SMART UNIT IS FAULTY)