Code Definition

B1C45 (13) — Front Wiper Park Position Switch Circuit Open

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

About B1C45

B1C45 is a manufacturer-specific body diagnostic trouble code recorded for Mazda vehicles. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B1C45 is stored, the module has detected an open (broken or disconnected) electrical path 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.

B1C45 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 front wiper park position switch signal to confirm that the wiper motor has returned to and remains at the park position when wiper operation is switched off. DTC B1C45:13 is set when the BCM detects an open circuit condition in the front wiper park position switch circuit, meaning the expected park position signal is not received within a calibrated time or electrical range. The park switch is normally built into the wiper motor assembly and provides a ground or voltage transition as the motor reaches its rest position. When this code is set the wipe...

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