U3520

High Voltage System Interlock Circuit E High

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–278 (est.)

Symptoms

The malfunction indicator on the dashboard lights up
The car does not go into ready-to-drive mode
Reduced power or complete loss of traction
Inability to charge high voltage battery

Causes

Open or short circuit in the interlock circuit
High Voltage Lockout Sensor Malfunction
Damage to the high voltage system wiring harness
Problems with the high voltage system control module
Corrosion of contacts in the interlock circuit

How to Fix

Diagnose the high voltage interlock circuit
Check the integrity of the wiring harness and contacts
Test blocking sensors
Replace damaged components if necessary
Repair only from an authorized dealer

Related codes

U3510 U3530 U0100