Code Definition

B1989 — Pedal Position Rearward Switch Circuit Short to Battery

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

About B1989

B1989 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 B1989 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.

B1989 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 or Pedal Control Module monitors the adjustable pedal rearward switch input from the driver controlled rocker switch. DTC B1989 sets when the module detects a continuous battery voltage signal on the pedal rearward switch input circuit when no such voltage should be present. The pedal rearward switch is a momentary contact input commanding the adjustable pedal motor to drive the pedals away from the driver. A short to battery on this circuit may be caused by chafed wiring touching a 12V feed, a faulty rocker switch stuck closed, an internal switch pack short, or a damag...

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