U3529

High Voltage System Interlock Circuit H

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$33–56 (est.)

Symptoms

Car won't start
Malfunction indicator light (MIL) is on
Error message on the dashboard
Problems with charging a high-voltage battery
Reduced High Voltage System Performance

Causes

Damage to the insulation of high-voltage cables
Lock sensor malfunction
Problems with wiring or connectors
Malfunction of the high-voltage system control unit
Corrosion of contacts in the interlock circuit

How to Fix

Check the insulation of high-voltage cables for damage
Check the lock sensors and their wiring
Check connectors and wiring for corrosion and damage
Check the high voltage system control unit for errors
Have your high voltage system diagnosed and repaired by a qualified technician.

Related codes

U3528 U3530 U1000