U3523
High Voltage System Interlock Circuit F Low
U3523 is an OBD-II diagnostic trouble code meaning: High Voltage System Interlock Circuit F Low. Common causes: open circuit in hvil circuit, short circuit in wiring. Estimated repair cost: $56–222.
Symptoms
- The malfunction indicator on the dashboard lights up
- Power limitation or inability to start the electric motor
- Disabling the High Voltage Battery
- Warning messages on display
- Sound warning signals
Causes
- Open circuit in HVIL circuit
- Short circuit in wiring
- Damaged or oxidized high voltage system connectors
- One of the HVIL components is faulty
- Problems with high voltage relay or fuse
How to Fix
- Diagnose the HVIL circuit using a scanner
- Visually check all high-voltage system connectors for damage
- Check integrity of HVIL wiring
- Test interlock circuit components
- Repair only from an authorized dealer
Related codes
Error U3523 by Vehicle Brand
FAQ
What does the U3523 code mean?
U3523 is an OBD-II diagnostic trouble code that indicates: High Voltage System Interlock Circuit F Low
What causes a U3523 error code?
The most common causes of U3523 include: Open circuit in HVIL circuit; Short circuit in wiring; Damaged or oxidized high voltage system connectors; One of the HVIL components is faulty.
How do I fix a U3523 diagnostic trouble code?
To fix U3523: Diagnose the HVIL circuit using a scanner. Visually check all high-voltage system connectors for damage. Check integrity of HVIL wiring. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U3523?
Do not drive — repair immediately
How much does it cost to fix U3523?
The estimated repair cost for U3523 is $56–222. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat