DTC B230D-13: Sub Battery Power Supply Route Circuit Open [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 B230D-13 is output A B230D-13 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) - SECOND POWER SUPPLY REMOTE PARKING CIRCUIT)
Pre-procedure1
- Disconnect the cable from the negative (-) auxiliary battery terminal.
- Disconnect the H191 integrated capacitor (integration control supply) connector.
- Disconnect the H194 second power supply remote parking circuit connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition Result H191-1 (BUA3) - H194-5 (B1A2) Ignition switch off Below 10 Ω Ω H191-8 (BUE3) - H194-3 (BIE2) Ignition switch off Below 10 Ω Ω H191-1 (BUA3) or H194-5 (B1A2) - Body ground Ignition switch off 10 kΩ or higher kΩ H191-8 (BUE3) or H194-3 (BIE2) - Body ground Ignition switch off 10 kΩ or higher kΩ Result
Proceed to OK NG
Post-procedure1
- None
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 3
- CHECK HARNESS AND CONNECTOR (SECOND POWER SUPPLY REMOTE PARKING CIRCUIT - INTEGRATED CAPACITOR (INTEGRATION CONTROL SUPPLY))
Pre-procedure1
- Reconnect the H194 second power supply remote parking circuit connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition Result H191-8 (BUE3) → H191-1 (BUA3)* Ignition switch off Below 10 Ω Ω H191-1 (BUA3) → H191-8 (BUE3)* Ignition switch off 10 kΩ or higher kΩ H191-8 (BUE3) - Body ground Ignition switch off 10 kΩ or higher kΩ H191-1 (BUA3) - Body ground Ignition switch off 10 kΩ or higher kΩ - *: Since there is a diode in the second power supply remote parking circuit which conducts in only one direction, switch the polarity when performing an inspection.
Result
Proceed to OK NG
Post-procedure1
- None
Result:
OK
REPLACE INTEGRATED CAPACITOR (INTEGRATION CONTROL SUPPLY). Refer to REMOVAL [08/2023 - ]
Result:
NG
REPLACE SECOND POWER SUPPLY REMOTE PARKING CIRCUIT. Refer to REMOVAL [08/2023 - ]