No Bus Bias

SYMPTOM LIST
* NO BUS BIAS

TEST NOTE: All symptoms listed above are diagnosed using the same tests. The title for the tests will be * BUS (+) & (-) OPEN.

POSSIBLE CAUSES
- Defective DRB/BIAS out of range
- CCD fused B (+) circuit voltage > 10
- CCD bus (+) circuit open
- CCD bus (-) circuit open
- CCD fused ignition output circuit voltage > 10
- CCD ignition off
- Open ground CKT/no bus bias
- CCD BCM bias out of range
- Defective BCM-no bus bias
- Defective BCM-bus(+)(-) open