20 pin 282994-2 Automotive Electric Cable Socket Plastic Female Male Connector Pitch Connectivity Housing

2.7.4 The use of relay agents
Like resistors and capacitors, relays are actually a standard part. In automotive maintenance, sometimes the relay of a certain model is out of stock. What should I do? In fact, sometimes the relays in two completely irrelevant systems can be swapped. If the maintenance personnel mastered this law, they can be shortened. Maintenance time, saving maintenance costs.
① The ABS relay of the Red Flag 7220AE sedan is integrated in the ABS control unit. If the entire ABS control unit is replaced due to this relay break, it takes more than 3,000 yuan to use the relay on the old anti -theft device.
② Control the relay in the glass lifter of the red flag car can replace the relay in the Alice 16V car air -conditioning compressor control module. This can avoid changing the control module assembly of the expensive Alishe car air conditioner compressor.
③ The relay of German cars can often be replaced. A Porsche Boxster sports car, the horn does not sound, the owner is required to repair it as soon as possible. The inspection found that the contacts of the speaker relay have been metropped. If you replace the original relay, you need to order from Germany. It takes at least one month and the price is 400 yuan. After observation, the shape of this relay is very similar to the 53 relay on the Audi 100 car, which measures its resistance. The same as Porsche's relay is the same. So I found a 53 relay of the Audi 100 car installed on the Porsche sports car and successfully completed the successful completion. Replace.
The reason is that many electrical equipment of German cars is supplied by German Bosch. As far as relay is concerned, as long as the foot is inserted, the resistance is the same, and it can generally be universal.
④ To replace the relay, you must recognize the part number. For example, Ruifeng Commercial Vehicle uses two engines to control relay. One is the 2.4L-top camshaft 8 valve engine control relay. Its part number is 39160-24520 or 39160-24530, which is imported accessories in South Korea. The second is the 2.4L double-top camshaft 16 valve engine or color journey 2.4L4GAL engine control relay. Its part number is 39160-24540, which is imported or domestic accessories. The engines of these two different part numbers control the meaning of each terminal of relay are different, so they cannot be replaced.
If an engine with part number 39160-24530 controls relay to replace the relay with the part number of 39160-24540, a set of contacts in the relay will often be closed. When the vehicle is static, it will easily cause the engine ECU damage and shorten it. The service life of batteries.
Digital analysis on relay members
Use a multimeter resistance to measure relay 85 and 86 feet, and the resistance should be normal in 65-85Ω .
Measure relay coil resistance
The 85 and 86 feet are connected to both ends of the battery, and the resistance of 30 and 87 feet is measured after power-on, about 0Ω .
2.8.1 Engine control unit (ECU)
(1) Overview of four parts of the air intake system, fuel supply system, ignition system, and computer control system. The air intake system consists of an air filter, air flowmeter, throttle, air intake head tube, air intake manifold, etc., which provides the required air for the flammable mixed gas of the engine; the fuel supply system is The fuel pressure regulator, the fuel injector and the fuel supply pipe are composed, which provides the required fuel for the flammable mixed gas of the engine; the ignition system provides an electric spark for the engine. It consists of ignition electronic components, ignition coils, spark plugs, high -voltage wires, etc. The computer control system consists of an electronic control unit (ECU) and various sensors. It controls the fuel jet time and the amount of injection and ignition time.

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