Code Definition

B1522 — Hood Switch Circuit Short To Ground

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

About B1522

B1522 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 B1522 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.

B1522 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 Hood Switch is a body system input that informs the body control module, central electronic module, or alarm controller whether the hood is open or closed and forms part of the security and convenience systems on the vehicle. The switch is normally a plunger or magnetic reed type that closes a path to ground when actuated, while at rest the controlling module sees a pulled up reference voltage on the signal wire. DTC B1522 is set when the controlling module sees the signal wire continuously pulled to ground at a time when the switch should be open, indicating a short to ground somewhere in...

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