Normal Operation
The Body Control Module B (BCM-B) controls the output of several vehicle systems by means of solid state drivers. When an overload occurs on any of these drivers, a DTC sets. The module also tracks the number of repetitive faults on each of these circuits. The module compares this number of overloads to 3 progressive thresholds established for each circuit.
At the each threshold, DTC U1000:00 sets along with the DTC associated with the affected circuit.
- DTC U1000:00 (Solid State Driver Protection Activated - Driver Disabled: No Sub Type Information) - a continuous DTC that sets when the BCM-B has disabled an output circuit due to a repetitive fault that overloads said circuit. A corresponding DTC for the circuit in question is also set.
When DTC U3000:49 is set because the module has reached a third threshold and the BCM-B has permanently disabled an output, a measurement using a digital multimeter of the affected output circuit is required to make sure the fault condition no longer exists.
This pinpoint test is intended to diagnose the following:
- Output circuit short
- BCM-B