P0B42

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, P308A-123: Hybrid Battery Voltage Sensor "A" Circuit Low
P308A-123 - Hybrid Battery Voltage Sensor All Circuits Low

DESCRIPTION

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





HINT
- Values smaller than 2.0 V may not be shown in the Data List because a fail-safe value is substituted.
- Hybrid battery voltage sensor in the DTC titles refers to the battery smart unit.

MONITOR DESCRIPTION

If the battery smart unit detects a voltage drop in a battery module, the hybrid vehicle control ECU will 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 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 P0A1F-123 IS OUTPUT) P0A7F

B -- GO TO DTC CHART P0A1F
A -- Continue to next step.

2. CHECK CONNECTOR CONNECTION CONDITION

CAUTION:
Be sure to wear insulated gloves.

(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 power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

(c) Remove the hybrid battery junction block assembly Removal.

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





OK:

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

(e) Install the hybrid battery junction block assembly Installation.

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

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

3. REPLACE BATTERY SMART UNIT

(a) Replace the battery smart unit Components.

NEXT -- Continue to next step.

4. CLEAR DTC (HV)

(a) Connect the Techstream to the DLC3.

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

(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

(d) Clear the DTCs and freeze frame data.

(e) Perform a road test to charge and discharge the HV battery assembly.

(f) Disconnect the Techstream from the DLC3.

NEXT -- Continue to next step.

5. RECONFIRM DTC OUTPUT (HV)

(a) Connect the Techstream to the DLC3.

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

(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

(d) Read output DTCs.

Result





(e) Disconnect the Techstream from the DLC3.

B -- REPLACE HV BATTERY ASSEMBLY Components

A -- RETURN TO NORMAL OPERATION