Data Link Connector: Description and Operation

PCM Wiring Diagram (6 Of 7):

PURPOSE
Two Serial Data terminals connect the Engine Control Module (PCM) and the Central Control Module (CCM). Serial data is data that has been processed and must be communicated between the PCM, CCM, and other control modules. Shared serial data allows processed information to be available to more than one control module.

DESCRIPTION
The CCM may need to be informed of certain operating conditions such as, vehicle speed, oil or coolant temperature etc. Shared serial data allows the CCM to instantly obtain such information from already processed information contained in the PCM. Likewise the PCM can access information in the CCM when necessary. Shared serial data is also common between other control modules in this system. Serial data links are carried over CKT 800.