What are the common causes of U352E?

Interlock loop J voltage outside its expected range. High resistance in the interlock loop J wiring. A loose interlock loop J connector. Water in the interlock loop J connector.

Read high voltage interlock circuit J status on a scan tool. De-energize the high voltage system before touching any connector. Inspect interlock loop J connector pins for corrosion and water. Test interlock loop J for continuity and resistance. Repair interlock loop J if the signal stays out of range. Clear the code and retest.

U352E

High Voltage System Interlock Circuit J Performance

System: Network communication (U code)
Lamp: Check Engine Light
Category: Network Communications

What it means

U352E means High Voltage System Interlock Circuit J Performance.

Check these first

Interlock loop J voltage outside its expected range
High resistance in the interlock loop J wiring
A loose interlock loop J connector
Water in the interlock loop J connector

What to do next

Read high voltage interlock circuit J status on a scan tool
De-energize the high voltage system before touching any connector
Inspect interlock loop J connector pins for corrosion and water
Test interlock loop J for continuity and resistance
Repair interlock loop J if the signal stays out of range
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.