LR2 No crank
Recovery Vehicle
Joined: Feb 2013
Posts: 844
Likes: 225
That is not really the case. There are two kinds of persistent memory, one is the ECU programming that is not supposed to change unless you specifically reprogram the unit, the other is data that is relevant to day to day operation. The ECU programming is in EEPROM, but the that kind of memory is relatively slower. The day to day data is usually in battery-backed persistent memory. If the battery power goes away eventually that memory loses its data.
TReK
Joined: Jan 2020
Posts: 2,152
Likes: 631
From: Massachusetts
Well, no, that's why when you disconnect the battery the ECU has to relearn your driving profile but not the programming for engine control.
Winching
Joined: Dec 2018
Posts: 572
Likes: 165
TReK
Joined: Jan 2020
Posts: 2,152
Likes: 631
From: Massachusetts
It will work, SDD hasn't been updated for older models in a long time.
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Three Wheeling
Joined: Nov 2020
Posts: 68
Likes: 13
Hello All, So after scanning today with the SDD it pointed to start control unit 100%. Is this 100% solid correct? I wasnt able to perform the LIN test as recommended. Is that needed or should I post the DTC's?
TReK
Joined: Jan 2020
Posts: 2,152
Likes: 631
From: Massachusetts
Post the DTC's. There's a bunch of error codes associated with the Start Control Unit. Be careful working with that. To remove it you have to remove the airbag, and you also need to use SDD to upload the data from the existing unit to reprogram a replacement unit.
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Three Wheeling
Joined: Nov 2020
Posts: 68
Likes: 13
OK here we go.... I guess the reason I question it is the fact that I still have the flashing alarm led with the FOB engaged. Does the immoblizer give the same symptoms? I am searching for this specific symptom but...
Last edited by UP49802; Nov 6, 2021 at 09:53 PM.