Test I: No International Standards Organization (ISO) 9141 Communications Network Communication
PINPOINT TEST I: NO INTERNATIONAL STANDARDS ORGANIZATION (ISO) 9141 COMMUNICATIONS NETWORK COMMUNICATIONI1-I3:
I3-I5:
Normal Operation
The restraint control module (RCM) communicates with the diagnostic tool through the ISO 9141 communications network, circuit 70 (LB/WH). Check circuit 70 (LB/WH) between the RCM C2041a and the data link connector (DLC) C251.The total resistance value must not be more than 5 ohms. If the resistance is more than 5 ohms there is an open in the ISO 9141 communications network circuit, damage to the DLC C251, damage to the RCM C2041a, or damage to an in-line connector.
Possible Causes
- ISO 9141 communications network circuit 70 (LB/WH) short to ground, short to voltage or open
- DLC C251
- RCM C2041a
- RCM