Normal Operation

The RCM communicates with the diagnostic tool through the ISO 9141 communications network circuit (LB/W). If circuit (LB/W) becomes open or shorted to ground, communications to that module will not be possible. Check circuit (LB/W) between the RCM 0810-101 and the DLC D-01. Total resistance values must not be more than 5 ohms. If the resistance is more than 5 ohms there is an open in the ISO network circuit, damage to the DLC D-01, or damage to the 0810-101.