No CCD Communication (Stored)

Test 1:

SYMPTOM
NO CCD COMMUNICATION (STORED)

TEST NOTE
This symptom is diagnosed using the test AECM & CLUSTER CCD MESSAGE MISMATCH (STORED).

WHEN MONITORED
With the ignition ON and the DRB in airbag diagnostic mode.

SET CONDITION
During airbag diagnosis, DRB requests information from ACM. ACM sends information over the CCD bus CCD chip echoes information back to microprocessor. Code is set if ACM cannot communicate on CCD bus or microprocessor fails to see the echoed message.

POSSIBLE CAUSES
- Stored code has become active
- Stored code has not been reproduced