Test L: No International Standards Organization (ISO) 9141 Communications Network Communication

PINPOINT TEST L: NO INTERNATIONAL STANDARDS ORGANIZATION (ISO) 9141 COMMUNICATIONS NETWORK COMMUNICATION

L1-L4:

L5:

Normal Operation
The parking aid module (PAM) communicates with the diagnostic tool through the ISO 9141 communications network circuit 70 (LB/WH). If circuit 70 (LB/WH) becomes open or shorted to ground, communications to that module are not possible. Check circuit 70 (LB/WH) between the PAM C3267 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 PAM connector, or damage to an in-line connector.

Possible Causes
- ISO 9141 communications network circuit 70 (LB/WH) open, short to ground, or short to voltage
- DLC C251
- PAM C3267
- PAM