Bus (+) Open or Bus (-) Open

Test 1 - 3:

Test 4:

SYMPTOM
BUS(+) OPEN OR BUS (-) OPEN

TEST NOTE
This symptom is diagnosed using the test BUS(+) AND BUS(-) OPEN.

POSSIBLE CAUSES
- Data link connector CCD bus (+) open
- Data link connector CCD bus (-) open
- DRB or CABLE causes bus bias voltage out of range
- Instrument cluster causing CCD bus open failure