DTC B2290-7E: Sub Battery System Output Power Relay "C" Actuator Stuck On [08/2023 - ]: Procedure

1. Check for DTCs.

   Body Electrical > Sub Battery System > Trouble Codes 

   Result

   Result	Proceed to
   B2290-7E is output	A
   B2290-7E is not output	B

Result: 

B 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - ] 

Result: 

A 

See step  2

Pre-procedure1

• Disconnect the H191 integrated capacitor (integration control supply) connector.

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

  Standard Voltage

  Tester Connection	Condition	Specified Condition	Result
  H191-10 (BUE2) - Body ground	Ignition switch off	Below 5 V	V

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

OK 

REPLACE INTEGRATED CAPACITOR (INTEGRATION CONTROL SUPPLY). Refer to  REMOVAL [08/2023 - ] 

Result: 

NG 

See step  3

Pre-procedure1

• Disconnect the C90 power distribution box assembly connector.

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

  Standard Voltage

  Tester Connection	Condition	Specified Condition	Result
  H191-10 (BUE2) - Body ground	Ignition switch off	Below 1 V	V

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

Pre-procedure1

• Remove the power distribution box assembly.

  HINT: 

  Refer to REMOVAL [08/2023 - ]

• Remove the main body ECU (multiplex network body ECU).

• Measure the resistance according to the value(s) in the table below.

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *a

  Component without harness connected (Power Distribution Box Assembly)

  -

  -

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  C90-27 - z31-25 (SBAT)	Always	Below 1 Ω	Ω
  C90-27 or z31-25 (SBAT) - Other terminals	Always	10 kΩ or higher	kΩ

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

OK 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [08/2023 - ] 

Result: 

NG 

REPLACE POWER DISTRIBUTION BOX ASSEMBLY. Refer to  REMOVAL [08/2023 - ]