Test U: No Communication With the Restraint Control Module (RCM)

U1 - U2:

U3:

U4 - U5:

Normal Operation
The RCM communicates with the scan tool using ISO 9141 communication mode through the Data Link Connector (DLC).

Possible Causes
A no communication condition could be caused by:
^ damage to circuit 70 (LB/WH).
^ a damaged DLC.
^ a damaged scan tool.
^ an RCM internal concern.