Thin lines, wires. Connector. 1 EJB connectors. 2 Pass through connector chassis-cab. 3 Others. OR ”It is an exclusive OR (only one possibility) between the different solutions due to the configuration of the vehicle. Electronic Control unit. The inputs/outputs of ECUs are symbolized in the way described below: 2 alternative of digital output low (set to the ground). Digital output high (set to 24V, 5V...). Ground of ECU. Analog input. Active low. Wiring diagram Page 3 (224)