Engine Control Module

ENGINE CONTROL MODULE (DME)







The DME installed location continues to be in the E-Box.
- DME control modules designed to operate with the EWS II system will not interchange with DMEs from previous models.
- The ISN replaces the BC Code input to the DME control module.
- As of 1/95 production, all DME Control Modules will incorporate the new ISN code number. This number is unique to each DME and cannot be changed or overwritten. The ISN is transferred and stored in the EWS II Control Module on the assembly line.

Every time the ignition is switched "ON", the ISN number is sent from the EWS control Module to the DME, as a digital coded signal. The numbers must match before the DME will release the driveaway protection.

- The ISN is continuously sent to the DME as long as the ignition is switched on.
- The DME will ignore the loss of the ISN after the engine is running.
- The EWS - DME link stays active for 10 seconds after the ignition is switched off.
- Restarting or switching the ignition on within ten seconds cancels the key identification procedure.
- The EWS control module signals the transmitter / receiver module to cancel the key identification process.