Test B: The Control Illumination Is Always On - All Hardwired Illumination

PINPOINT TEST B: THE CONTROL ILLUMINATION IS ALWAYS ON - ALL HARDWIRED ILLUMINATION

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).

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. The DTC also sets as a result when fuse 10 (15A) has failed or is removed.

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- SJB

B1-B3: