Diesel Data: Automotive Repair

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

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


H1:






H1-H3:






H3-H5:






H6-H7:






Normal Operation
The restraints control module (RCM) communicates with the scan tool through the ISO 9141 communications network, circuit 70 (LB/WH).

Possible Causes
- Circuit 70 (LB/WH) open, short to ground or voltage (ISO 9141)
- RCM