Test U: No Communication With the Restraints Control Module

U1:

U1 - U3:

U3 - U4:

U5 - U6:

Normal Operation
The scan tool Communicates with the Restraints Control Module (RCM) monitors through the Data Link Connector (DLC) C251 pin 7, 70 (LB/WH).

Possible Causes
A no communication with the RCM fault can be caused by:
^ Wiring, terminals, or connectors.
^ A faulty Data Link Connector (DLC).
^ RCM is faulted.