DTC B22C5-7E: Sub Battery System Output Power Relay "B" Actuator Stuck On [08/2023 - ]: Procedure
WARNING: This page is about a different car, the 2025 Lexus RX 350, 2024 Lexus RX 350, and 2023 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK FOR DTC
- Check for DTCs.
Body Electrical > Sub Battery System > Trouble Codes
Result
Result Proceed to B22C5-7E is output A B22C5-7E 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
- Check for DTCs.
- CHECK HARNESS AND CONNECTOR (INTEGRATED CAPACITOR (INTEGRATION CONTROL SUPPLY))
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 H191-19 (BUA) - 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
- CHECK HARNESS AND CONNECTOR (INTEGRATED CAPACITOR (INTEGRATION CONTROL SUPPLY) - SHIFT CONTROL ACTUATOR ASSEMBLY (SHIFT ACTUATOR ECU))
Pre-procedure1
- Disconnect the B56 shift control actuator assembly (shift actuator ECU) connector.
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition Result H191-19 (BUA) or B56-6 (MA2) - Body ground Ignition switch off Below 1 V V Result
Proceed to OK NG
Post-procedure1
- None
Result:
OK
REPLACE SHIFT CONTROL ACTUATOR ASSEMBLY (SHIFT ACTUATOR ECU). Refer to REMOVAL [10/2022 - ]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR