U352DHigh Voltage System Interlock Circuit J
- Generic OBD-II code · Network
- Turns on the check-engine light
- Can trigger limp mode
- How the car detects it
- U352D is the summary code for interlock circuit J, the ninth loop in J2012 lettering, which leaves out the letter I. What the loop contains is up to the maker, and none has published it. A loop need not pass through plugs only: a Ford patent for a centralised interlock leads the circuit across mating body parts such as the hood or trunk latch and its receptacle, so that opening the lid by itself switches high voltage off; floor access panels are named as a further option. Where a design like this is used, a lid that has not fully latched can explain a fault on loop J. Check latches before wiring; the vehicle cannot become ready until the loop is complete.
- What you may notice
- No ready mode, often right after a hood, trunk or underbody panel was opened
- High-voltage system warning in the instrument cluster
- Charging blocked
- Likely causes
- LikelyConnector in loop J not fully latched
- PossibleHood, trunk or access panel latch wired into loop J not fully engaged
- PossibleLoop J wiring damaged
- RareController that drives and reads loop J faulty
- Repair
- Hard · Usually a job for a workshop.Typical cost: €60 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.