Code Definition

B2187 — Rear Wiper Select Switch B Short to Ground

System: Body  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About B2187

B2187 is a generic (obd-ii standard) body diagnostic trouble code. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B2187 is stored, the module has detected a short-circuit (voltage pulled to ground or to supply) in the monitored circuit.

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.

Because B2187 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The Body Control Module (BCM) reads the rear wiper select switch position by monitoring discrete switched inputs, with the B input representing one of the rear wiper position discrete signals (typically the On or Low position) on the rear wiper portion of the multifunction switch. DTC B2187 sets when the BCM detects that the B select signal is held at ground potential when no valid command should be present, indicating a short to ground on that circuit. Because the input normally rests at a pulled up reference and only goes low when the rear wiper stalk is moved into the B position, a constant...

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