ABS Message Not Received

SYMPTOM LIST
ABS MESSAGE NOT RECEIVED

TEST NOTE All symptoms listed above are diagnosed using the same tests. The title for the tests will be ABS MESSAGE MISMATCH.

WHEN MONITORED
Continuously with ignition on.

SET CONDITION
No echo message back from instrument cluster for more than 12 seconds.

POSSIBLE CAUSES
- CCD bus(-) circuit open
- Controller antilock brake ground circuit open
- Fused ignition switch output circuit open
- No RESP cab DEF bus - CKT open
- CCD bus(+) circuit open
- Fused B(+) circuit open