U352A

High Voltage System Interlock Circuit H Performance

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
Reduced power or complete loss of traction
Inability to start the engine (in hybrid systems)
Error message on display
High voltage system failure

Causes

Broken or damaged HVIL circuit wires
Oxidation of contacts in connectors
Malfunction of one of the circuit limit switches
Wiring harness damage
Problems with the high voltage system control unit

How to Fix

Visual inspection of HVIL circuit wiring and connectors
Checking continuity with a multimeter
Cleaning contacts in connectors
Replacing damaged wiring sections
Diagnosis and replacement of faulty circuit components
Repair only from an authorized dealer

Related codes

U352B U352C U352D