B420

The BCM has the ability of both commanding an output and checking that the commanded state has been achieved. If the commanded and actual state are not the same a code will be set.

Notes on trouble trees
1. This determines which of the outputs are suspect.
2. The following steps will determine which failure is the likely cause for the code.

Note on Intermittents
If code B441 is also set then circuit 790 should be checked for interminent connections. If the code B44 1 is not set, then the 961 circuit and pin 1-C6 should be checked for intermittent connections.