Normal Operation

The smart junction box (SJB) sends a pulse-width modulated (PWM) voltage to the dimmable components through circuit VLN04 (VT/GY) (Edge) or circuit VLN37 (BU/WH) (MKX). Ground is provided through circuits GD116 (BK/VT), GD126 (BK/WH) and GD139 (BK/YE).

This pinpoint test is intended to diagnose

• Wiring, terminals or connectors
• Floor shifter
• LH rear heated seat switch (if equipped)
• RH rear heated seat switch (if equipped)
• Manual temperature control (if equipped)
• Message center switch (if equipped)
• Memory set switch (MKX)
• Window adjust switches (MKX)
• Door lock control switches (MKX)
• Headlamp switch
• Hazard/passenger air bag disable/traction control switch (if equipped)
• Power liftgate release switch
• Roof opening panel switch (if equipped)