Test E: The Vehicle Security Module Does Not Respond To The Diagnostic Tool

PINPOINT TEST E: THE VEHICLE SECURITY MODULE DOES NOT RESPOND TO THE DIAGNOSTIC TOOL

E1-E2:

Normal Operation
The vehicle security module communicates with the diagnostic tool through the international standards organization (ISO) 9141 communications network, circuit 70 (LB/WH). Check circuit 70 (LB/WH) between the vehicle security module C203b 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 vehicle security module C203b, or a problem in an in-line connector.

Possible Causes
- ISO 9141 circuit 70 (LB/WH)
- vehicle security module