A9 Check Readout Using NGS

- Remove breakout box and anti-lock brake module adapter cable.

- Reconnect anti-lock brake control module. Make sure all connections are clean and tight.

- Connect NGS and run on-board diagnostic. On-Board Diagnostics

- Is readout possible?

YES -- The fault was intermittent. The data link should be considered operational.

NO -- Replace anti-lock brake control module.