Conditions for Setting the DTC
WARNING: This page is about a different car, the 2017 Chevrolet Spark. However, it is still accessible from the selected car via links, so may be relevant.
B3811 01
The body control module detects a short to B+ in the rear windshield washer pump relay control circuit
B3811 02
The body control module detects a short to ground in the rear windshield washer pump relay control circuit
B3811 04
The body control module detects an open or high resistance in the rear windshield washer pump relay control circuit or the ground circuit