Code Definition

B1632 — Mirror Driver Left Circuit Open

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

About B1632

B1632 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 B1632 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.

B1632 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 integrity of its driver side exterior mirror output circuit and sets DTC B1632 when it detects an open circuit condition on that output. An open circuit means the BCM is commanding the mirror motor to operate but is unable to detect the expected current flow on the return side, indicating that the electrical path between the BCM and the motor has been broken somewhere along the harness, connector, or motor windings. The mirror system uses small DC motors driven in either polarity by the BCM to move the glass through horizontal and vertical axes, with ...

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