Code Definition

B1211 — EIC Switch-2 Assembly Circuit Short To Battery

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

About B1211

B1211 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 B1211 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.

B1211 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 Electronic Integrated Cluster (EIC) module monitors a network of instrument cluster switches that handle driver interface functions such as trip reset, display mode selection, and vehicle information readouts. DTC B1211 is set when the EIC module detects an unexpected battery voltage on the Switch 2 input line with the switch in its rest position, indicating that the signal wire has contacted a 12V circuit somewhere between the switch assembly and the module. Most EIC switch inputs normally idle at approximately 5V through a small internal pull up and drop to ground when the switch is pres...

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