The P0B35: High Voltage Service Disconnect Circuit Low code indicates that the voltage in the high voltage service disconnect circuit is lower than expected. This can be caused by a faulty disconnect switch, wiring problems, or other electrical issues. If left unresolved, it may prevent the safe isolation of high voltage components and pose a safety risk.
P0B35 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P0B35: High Voltage Service Disconnect Circuit Low |
| Is it serious? | Yes, low voltage in the disconnect circuit can lead to safety risks and improper high voltage isolation. |
| Possible causes | – Low voltage in high voltage service disconnect circuit – Faulty disconnect switch – Wiring or electrical issue |
| How to diagnose? | – Measure voltage in high voltage service disconnect circuit – Test disconnect switch functionality – Inspect wiring and electrical system |
P0B35 Meaning
The P0B35 code is triggered when the voltage in the high voltage service disconnect circuit is below the expected range. This can occur due to a malfunctioning disconnect switch, wiring issues, or other electrical faults. Low voltage in this circuit can affect the ability to safely disconnect high voltage components, potentially leading to safety hazards or system malfunctions.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for any additional codes related to the hybrid or high voltage systems. | OBD-II Scanner |
| Measure Voltage in High Voltage Service Disconnect Circuit | Use a multimeter to measure the voltage in the disconnect circuit and compare it to the manufacturer’s specifications. | Multimeter |
| Test Disconnect Switch Functionality | Test the functionality of the high voltage disconnect switch. If the switch is faulty, replace it. | Multimeter, Diagnostic Tool |
| Inspect Wiring and Electrical System | Inspect the wiring and connections for damage, corrosion, or loose connections that may be causing low voltage. | Flashlight, Multimeter, Safety Gloves |
| Clear the Code and Test Drive | After repairs, clear the code and take the vehicle for a test drive to ensure the issue has been resolved. | OBD-II Scanner, Vehicle Owner’s Manual |
| Recheck for Codes | Rescan the vehicle after the test drive to confirm that the P0B35 code does not return. | OBD-II Scanner |
OBD-II scanner Buyer’s Guide
- Scanner features explained
- Different types of scanners
- Scanners for coding/odometer/ECU/checks
- Best picks + discount codes
I test OBD-II scanners and make DIY Engine diagnostics guides to help you solve your car problems without having to depend on the mechanic. A lot of them will try to scam you or are just no help at all. About Juraj Lukacko