No Communication With EBCM/EBTCM

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CIRCUIT DESCRIPTION
The Class 2 serial data line allows all the modules on the line to transmit information to each other as needed. Each module is assigned an ID and all the information sent out on the line is assigned a priority by which it is received. When the ignition switch is turned to the run position each module begins to send and receive information. Each module on the Class 2 serial data line knows what information it needs to send out and what information it should be receiving. What the modules do not know is which module is supposed to send them the information. This information is only learned after the module has received the information it needs along with the ID of the module that sent the information. This information is then remembered until the ignition switch is turned off.

DIAGNOSTIC AIDS
1. The following conditions may cause an intermittent malfunction to occur:
^ A poor connection
^ A rubbed-through wire insulation
^ A broken wire inside the insulation

2. Inspect any circuitry that may cause the intermittent complaint for the following conditions:
^ Backed out terminals
^ Improper mating
^ Broken locks
^ Improperly formed terminals
^ Damaged terminals
^ Poor terminal to wiring connections
^ Physical damage to the wiring harness