Normal Operation

The smart junction box (SJB) then supplies a pulse-width modulated (PWM) voltage signal to the dimmable illumination sources on circuit VLN04 (VT/GY). Ground is provided through circuits GD111 (BK/BU), GD133 (BK), and GD147 (BK/VT).

• DTC B2A32 (LED Backlighting Output Circuit Open) - is an on-demand DTC that sets when the SJB detects a short to voltage on the LED backlighting output circuit.

This pinpoint test is intended to diagnose the following:

• Wiring, terminals or connectors
• SJB