DTC P162B-87: Lost Communication with Battery Monitor Module Missing Message [10/2022 - ]: 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 [10/2022 - 11/2023] , or refer to INSTALLATION [11/2023 - ]

Result: 

OK 

See step  2

Refer to ON-VEHICLE INSPECTION [10/2022 - ] 

Result

Result: 

NG 

REPAIR OR REPLACE CHARGING SYSTEM 

Result: 

OK 

See step  3

1. Disconnect the ECM connector.
2. Disconnect the battery state sensor assembly connector.
3. Disconnect the generator assembly connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A83-44 (LIN) - A86-2 (LIN)	Always	Below 1 Ω
   A83-44 (LIN), A86-2 (LIN) or C57-2 (LIN) - 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 that the battery state sensor assembly connector is securely connected.

   OK

   The connector is securely connected.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

2. Disconnect the 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.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A86-3 (+B) - Body ground	Always	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

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

   Powertrain > Engine > Trouble Codes 

2. Clear the DTCs.

   Powertrain > Engine > Clear DTCs 

3. Turn the ignition switch off, wait 30 seconds.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  6

1. Start the engine.
2. Allow the engine to idle for approximately 60 seconds or more.
3. Check for DTCs.

   Powertrain > Engine > Trouble Codes 

   Result

   Result	Proceed to
   Only DTC P162B-87 is output	A
   DTC P161A-87 and P162B-87 are output.	B
   DTCs are not output.	C

Result: 

A 

REPLACE BATTERY STATE SENSOR ASSEMBLY 

Refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]

Result: 

B 

REPLACE ECM 

Refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]

Result: 

C 

CHECK FOR INTERMITTENT PROBLEMS 

Refer to CHECK FOR INTERMITTENT PROBLEMS [10/2022 - ]