U3524
High Voltage System Interlock Circuit F High
U3524 is an OBD-II diagnostic trouble code meaning: High Voltage System Interlock Circuit F High. Common causes: open circuit in high voltage blocking circuit, oxidation or damage to contacts in connectors. Estimated repair cost: $56–167.
Symptoms
- The malfunction indicator on the dashboard lights up
- The car may go into emergency mode
- Reduced power or inability to start
- Errors related to the high voltage system
Causes
- Open circuit in high voltage blocking circuit
- Oxidation or damage to contacts in connectors
- Malfunction of the high-voltage system control module
- Wiring harness damage
- Grounding problems
How to Fix
- Check the integrity of the high voltage blocking circuit
- Inspect and clean all contacts in HVIL connectors
- Check the resistance in the circuit
- Scan for other related trouble codes
- Repair only from an authorized dealer
Related codes
Error U3524 by Vehicle Brand
FAQ
What does the U3524 code mean?
U3524 is an OBD-II diagnostic trouble code that indicates: High Voltage System Interlock Circuit F High
What causes a U3524 error code?
The most common causes of U3524 include: Open circuit in high voltage blocking circuit; Oxidation or damage to contacts in connectors; Malfunction of the high-voltage system control module; Wiring harness damage.
How do I fix a U3524 diagnostic trouble code?
To fix U3524: Check the integrity of the high voltage blocking circuit. Inspect and clean all contacts in HVIL connectors. Check the resistance in the circuit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U3524?
Do not drive — repair immediately
How much does it cost to fix U3524?
The estimated repair cost for U3524 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat