Code Definition

B2562 — Aux A/C Blower Speed 1 Circuit Short to Ground

System: Body  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About B2562

B2562 is a generic (obd-ii standard) body diagnostic trouble code. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B2562 is stored, the module has detected a short-circuit (voltage pulled to ground or to supply) in the monitored circuit; and a signal or supply voltage lower than the expected operating range.

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.

Because B2562 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The Auxiliary Climate Control Module monitors the operation of the auxiliary (rear) A/C blower motor speed control circuits to verify each output is functioning within normal electrical parameters. DTC B2562 is set when the module detects that the speed 1 control output is being pulled to ground with the circuit commanded off, indicating a short to ground somewhere between the module driver and the blower resistor or speed control device. The auxiliary blower system uses separate control wires for each speed setting routed through the climate control switch, the auxiliary HVAC module, and the ...

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