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

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

P1:

P2-P5:

P6:

Normal Operation
The restraints control module (RCM) communicates with the diagnostic tool through the ISO 9141 communications network circuit 4-EE1 (GY/RD). If circuit 4-EE1 (GY/RD) becomes open or shorted to ground, communications to that module are not possible. Check circuit 4-EE1 (GY/RD) between the RCM C310a 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 either an open in circuit 4-EE1 (GY/RD), damage to the DLC C251, in-line C212 or damage to the RCM C310a.

Possible Causes
- ISO 9141 circuit 4-EE1 (GY/RD) short to ground or open
- in-line C212
- DLC C251
- RCM C310a
- RCM