Technicians remove the EIS,then disassemble the EIS cover.The EIS model is 2155450608 with 4J74Y(some vehicle model is 1J350D).Connect the two connectors to EIS which you disconnected when removing EIS.Use lighter to heat the CPU(4J74Y) about 3 seconds(Be careful,do not damage the CPU),then you will sound “crack”,it means that EIS running again,be quick to start the car and drive out of basement park. Last year,a benz W220 S350 owner parked this car at negative two-story basement park,but he could not start the vehicle next day morning.The remote function didn’t work,and he believed the key battery had run out of power,so he open the door by mechanical key,but burglar alarm ringing and he could not start the engine.Finally,he called local dealers to solve this problem.The technicians found the it was caused by EIS error.But the car,parking at negative two-story basement park could not be towed out to garage.So the technicians should to get solution to start the vehicle which EIS damaged. So much for the theoretical knowledge,now i share a real Benz EIS repair case: The other problem of 21554508450908 is electric leakage symptom.Maybe you will found it is difficult to start the car after parking your car whole day.It is caused by CPU instability,the gateway running all the time can’t switch to asleep mode,and EIS gateway can not be off when EIS have been turned off.All CPU are running,so it will lead to electric leakage symptom.Many workshop don’t understand the reason,the just add switch near the battery,and it is inconvenient for owner to operate.The solution recommended is to replace 1L85D and 3L40K chip. They are new version updated,the CPU 1L85D and 3L40K can work steadily.But I found a trouble,the EIS,ECU and ESL will renew passwork normally when you starting car,but the EIS equipped with 1L85D and 3L40K will never change the code.All S-series,E-series,C-series equipped with 9S12 have this problem.

They are firsr gen EIS of W220,equipped with two Motorola chip:1D69J and 0D69J.As the use of CPU long aging,it will result in gateway running all the time can not fall asleep and data lost.If 1D69J and 0D69J are damaged,it hardly to find replacement,but to replace whole EIS by 2155450608 or 2155450808 Insert the key into EIS,turn the ignition normally,but can not start the car and remote malfunction.This situation most likely that the CPU 1J35D or 4J74Y data damaged.And this problem can be solved by modifying chip data or replacing the CPU. Model 2155450408 EIS common fault and solution: The EIS models are frequently on again off again,include 2155450208,2155450408,2155450608.īased on past repair experience,it most likely caused by CPU instability.And this EIS trouble can be solved by replacing 1J35D and 4J74Y chip.

Bypassing eis on mercedes benz