DTC P162B-87: Lost Communication with Battery Monitor Module Missing Message [11/2022 - ]: Procedure

1. Check installation condition of the battery state sensor assembly.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

INSTALL THE BATTERY STATE SENSOR ASSEMBLY CORRECTLY 

Refer to INSTALLATION [11/2022 - ]

Result: 

OK 

See step  2

1. Check that the battery state sensor assembly connector is securely connected.

   OK

   The connector is securely connected.

2. Disconnect the O206 battery state sensor assembly connector.
3. Check the connector case and terminals for deformation or corrosion.

   OK

   No deformation or corrosion.

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Battery State Sensor Assembly)

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   O206-3 (+B) - Body ground	Ignition switch off	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (AUXILIARY BATTERY - BATTERY STATE SENSOR ASSEMBLY) 

Result: 

OK 

See step  3

1. Disconnect the A192 hybrid vehicle control ECU connector.
2. Disconnect the O206 battery state sensor assembly connector.
3. Disconnect the C143 compressor with motor assembly connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A192-16 (LIN3) - O206-2 (LIN)	Always	Below 1 Ω
   A192-16 (LIN3), O206-2 (LIN) or C143-3 (DOUT) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

1. Check for DTCs, and note down any DTCs that are output.

   Powertrain > Hybrid Control > Trouble Codes 

2. Clear the DTCs.

   Powertrain > Hybrid Control > Clear DTCs 

3. Turn the ignition switch off and wait for at least 30 seconds.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  5

1. Check for DTCs, and note down any DTCs that are output.

   Body Electrical > Air Conditioner > Trouble Codes 

2. Clear the DTCs.

   Body Electrical > Air Conditioner > Clear DTCs 

3. Turn the ignition switch off and wait for at least 30 seconds.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  6

1. Turn the ignition switch to ON (READY) and wait for 17 minutes or more.
2. Check for DTCs.

   Powertrain > Hybrid Control > Trouble Codes 

   Result

   Result	Proceed to
   DTC P162B-87 is output.	A
   DTCs are not output.	B

Result: 

B 

CHECK FOR INTERMITTENT PROBLEMS 

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2021 - ]

Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [09/2021 - ]

Result: 

A 

See step  7

1. Check for DTCs.

   Body Electrical > Air Conditioner > Trouble Codes 

   Result

   Result	Proceed to
   DTC B1498-87 is output.	A
   DTCs are not output.	B

Result: 

A 

REPLACE HYBRID VEHICLE CONTROL ECU 

Refer to REMOVAL [11/2022 - 12/2024] , or refer to REMOVAL [12/2024 - ]

Result: 

B 

REPLACE BATTERY STATE SENSOR ASSEMBLY 

Refer to REMOVAL [11/2022 - ]