A connecting structure between two passages includes a connecting sleeve including a large-diameter portion and a small-diameter portion with a shoulder surface defined therebetween. Several gaps are formed between the pump housing, the gear wheels, the driveshaft, and the crankshaft journal. When the master electronic element identifies that an electronic element is not functioning properly, the network executes a predefined response, such as a counter measure that limits the functional capability of the improperly functioning electronic element or other electronic elements. The at least one processor, in response to the remote start signal may generate the disengage transmission position command on the data communications bus, generate the climate control command on the data communications bus, and start the engine. The system includes a kit comprising the tool with replacement blades and multiple markers, and a method of using the modular tool.