Code Definition

B1583 — Dim Panel Decrease Input Circuit Failure

System: Body  |  Type: Manufacturer-Specific  |  Make: Generic

About B1583

B1583 is a manufacturer-specific body diagnostic trouble code. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B1583 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

Scanning & clearing: Body (B) codes are often stored in the body control module, airbag module, or climate module. A basic OBD-II tool usually will not read body codes — an enhanced or OEM-level scan tool is typically required.

B1583 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The Body Control Module (BCM) monitors the panel dimmer decrease input switch circuit, which the driver uses to lower the brightness of the instrument cluster and dashboard illumination. DTC B1583 sets when the BCM detects a circuit failure on the dim panel decrease input line, typically a short to ground, short to voltage, or an open circuit that does not match expected switch behaviour. The decrease side of the dimmer rocker or rheostat momentarily switches the input to ground (or to a defined voltage) when pressed, and the BCM uses that signal to step its PWM output to the panel illuminatio...

Join TaT to view the complete code information and diagnostic details.

Quick Facts