Pinpoint Test 1: The Control Illumination Is Inoperative - All Hardwired Illumination

PINPOINT TEST 1: THE CONTROL ILLUMINATION IS INOPERATIVE - ALL HARDWIRED ILLUMINATION

Normal Operation

The smart junction box (SJB) sends a pulse-width modulated (PWM) voltage to the dimmable components through circuit (V/GY). Ground is provided through circuits (B/G), (B/L) and (B).

- DTC B2A32 (LED Backlighting Output Circuit Open) - an on-demand DTC that sets when the SJB detects an open on the LED backlighting output circuit.
- DTC B2A33 (LED Backlighting Output Circuit Short To Ground) - a continuous and on-demand DTC that sets when the SJB detects a short to ground on the LED backlighting output circuit. The DTC also sets as a result when fuse 10 (15A) has failed or is removed.

Possible Causes
- Fuse
- Wiring, terminals or connectors
- SJB

Diagnostic Procedure

CAUTION:Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.