Mercedes-Benz G55 AMG engine fails to start

A mileage of about 78,000 km of the 2008 Mercedes-Benz G55 AMG. Engine chug phenomenon occurs after the car had finished solar film , when traveling to 130m , and then turn off the engine can not be started again : User reflected. Ignition switch can sometimes twist , twist and sometimes does not move , can start even in the case of twist , it does not rotate , but eobd2 often turn the engine electronic fan .
Troubleshooting : Connecting STAR diagnostic , select G-class models 463.270 testing, the engine control module is not detected , there with the engine control module communication failure , the presence of the same nature as the current ESP control module and transmission control module. It seems unable to start due to the engine control module can not be identified caused by vehicles entering the security state . The engine control module can not be detected for the following reasons : ① no power supply ; ② CAN communication line problem ; (3) K -line problem ; ④ engine control module damage . First check the engine control module power supply fuse, the fuse is located in the front passenger footwell above the front SAM control module , removed the front fender rear SAM control module , upon inspection , the fuse is intact and there is voltage. Due to engine control module and front SAM control module next to each other , and decided to remove the engine control module N3/10 plug terminals to check whether a power exists. When unplugging the engine control module cord, found that many stains thereon . Asked the owner to know , to the front windshield and Mileage Program Tools window glass paste Solar Films completed after only appeared . Due to engine control module N3 / 1. Located above the front passenger footwell , dashboard below , when affixed to the front windshield sun film , the water inside the dashboard , which flows along the wiring harness plugs eventually led to a communication error with the engine control module and the engine does not recognize control module.
Troubleshooting: After their hot air gun with an air gun and blow-dry and dry Replace commissioning , troubleshooting.
Fault Summary: Due to the engine control module driver recognition system is an integral component , equipment crab Lang Mang back fanny dad Pirates Paul loving uncle owned so contented Oriole Wu IS) control module (N73) via the CAN data bus to the engine control module to transmit information, and then lock the engine is controlled by the engine control module ( block ) , single-use only authorized vehicles to unlock the key again to start the engine (start ) , then EIS control module via the CAN data bus of this result information sent to the engine control module. The car engine control module due water, lead to recognition , and other system components to communicate with the driver , the vehicle can not be started is manifested ( into the security state ) , which is the best autel autolink driving engine control module recognition system Anti- start function. EIS control module only when "Allow start" ( driving recognition ) and transmission control module detects a driving gear is already in position P or N , in the start position touched by the ignition . The engine control module receives a signal from the adapter 50 via the control module EIS CAN data bus , controlled by the engine start control module ( touch start ) is performed automatically. Use ground signal actuating the starter relay , starter relay power contacts are closed, the starter solenoid coil voltage signal switch connector 50 without a fuse connector 50 signal from the connected, start the engine. When the engine speed reaches starting 400 ~ 700r/min, and the start time continuous 5-40s ( depending on coolant temperature ) , the engine control module interrupt the starter relay negative drive , thus ending the startup process. Further , the engine control module also controls the fuel injection system , the ignition system control functions , idle speed control system and the cruise control function .