1.2L REVOTRON ENGINE 54 Stagnant humidity and water standing directly on the sealing area (“bath tub”) between cover and bottom part or respectively the connector is not permissible. That means the defined mounting angles of the offer drawing must be considered. Formation of electro-chemical corrosion created by the use and connection of different metals within the installation of the control device is to be avoided. Following combination of materials are not acceptable: Steel – Brass - PBT = stress corrosion cracking (appearance of base at NaCl load). The first fixation point of the wiring harness must be in a distance - 150 mm from the cable outlet and on the same vibration level as the ECU. Relative motion between the wiring harness and the ECU has to be minimized. It has to be assured that no water can infiltrate through the wiring harness into the connector or the ECU respectively. This can be achieved by using a Siphon or a breathing hole. If the Electronic Control Module is coated, it must be ensured, that the Pressure Compensation Element (PCE), the connector and the label are free of coating. The mounting position of the ECU has to be in a distance which is large enough from a heat source to avoid any influence of heat transfer to the ECU. The mounting place of the ECU should be chosen to gain low humidity and corrosion loads. Permanent water spraying based on splash water must be avoided by appropriate protections. The impact of chemicals (e.g. oils, diesel, and gasoline, detergents for cleaning, brake fluid, battery acid, and so on) should be low.
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