Mercedes Vito EZS dead

[jacostanzo]

Hi friends, please need help to fix EZS from Vito, old model with 2 cpu's.
I checked when key is inserted coil don't energize, any idea what can be the problem? Thanks

[mercis]

for test make ,chip hot
possible hw or flash problem

[jacostanzo]

Already heat processor and is the same, check all swicthes and is ok.
Processor can be read by R270 without any problem, so might no be processor problem.

[mercis]

wich mask have you?

[jacostanzo]

wich mask have you?

Mask is 1L02M. EZS number 639 545 06 08

[mercis]

can you km see on odo?remote work?

[MarkPRP]

Check coil continuity on coil.


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[jacostanzo]

Check coil continuity on coil.


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I check inpedance from coil, and have a diferent value. I change coil for a new one and now have energy on coil, but key not turn

[mercis]

esl ok?have you 12v on esl,w639 have often bad contact inside eis and dont coming power to esl

[jacostanzo]

esl ok?have you 12v on esl,w639 have often bad contact inside eis and dont coming power to esl

I'm working on bench, car is from 300km far from me.
I have tried with emulator and original ESL, not turn.
Key count don't decrease when inserted from booth keys.
I had a similar problem with bad ESL, and every time I insert key, key count decrease.

[mercis]

make new key for test

[jacostanzo]

make new key for test

ok, I will, post result before.
But might no be key problem, one key is new BGA, only use 56 times, the other one is NEC are used a lot but is in good shape, booth read goods.
Also SSID from keys match with EZS.

[jacostanzo]

make new key for test

New key done... same can't turn. Even can't activated the new key

[mercis]

and what say star? actual value DAS

[MarkPRP]

Check lense


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[ernene]

Do you have a esl emulator connected? Have 12v?

[jacostanzo]

Don't have Star, lenses seems all ok.
Maybe the best is change EZS, but its hard to find mercedes Vito EZS from scrapyard

[MarkPRP]

Send to me I'll fix it


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[electronicservicemate]

change booth mcu and all will be ok