Normal Operation
WARNING: This page is about a different car, the 2010 Ford Pickup, 2010 Ford F550 Super Duty, 2010 Ford F450 Super Duty, and 2010 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
Based on the input received from the instrument panel dimmer switch, the Smart Junction Box (SJB) sends a Pulse Width Modulated (PWM) voltage to the hardwired dimmable components.
- DTC B2A32 (LED Backlighting Output Circuit Open) - an on-demand DTC that sets when the SJB detects an open on the 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 backlighting output circuit. This DTC also sets when fuse 10 (15A) has failed or is removed.
This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- SJB