Code Definition

B1241 — Wiper Washer Rear Pump Relay Circuit Short to Battery

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

About B1241

B1241 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 B1241 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.

B1241 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

On vehicles equipped with a rear washer system, the body control module or dedicated wiper control module drives the rear washer pump relay on the low side, meaning the module pulls the coil control wire to ground to energise the relay while the coil high side sits on fused battery voltage. The module monitors the voltage on its output pin and expects it to sit near battery voltage when the relay is off, and near 0V when the relay is commanded on. DTC B1241 is set when the module detects that the coil control wire is sitting at battery voltage even while it is commanding the output on, which c...

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