Hi guys,

I've been trying to read my buddies 02 1.8t B5.5 Passat Wagon (Immo) that has a 4B0 906 018 CM ECU.
I'm using the latest NefMoto software (I have 0 issues reading and flashing my friends 01 1.8t CH and my 01 S4 M box ECU)
I've tried multiple Baud rates, his car does have 12v of power, opened ECU to confirm stock (prev driver was an old lady its whole life) , pulled negative for 5mins on batt. terminal. The memory layout will instantly fail to read on his Passat (29F800) and this is the log when we try to full read.
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Restoring Windows sleep mode.
Disabling Windows sleep mode.
Reading ECU flash memory.
ECU reports programming session preconditions have been met.
Negotiating communication timings.
Successfully changed to new communication timings.
Requesting security access.
Security access granted.
Starting diagnostic session.
Successfully started diagnostic session.
Negotiating communication timings.
Successfully changed to new communication timings.
Requesting security access.
Security access granted.
Validating flash memory starts at 0x00800000 and ends at 0x00900000.
Validation failed, ECU reports RequestUpload service is not supported. RequestUpload may have been disabled by aftermarket engine software.
Memory layout validation failed.
Starting to read data block.
Calculating flash checksum to determine if reading is necessary for range: 0x00800000 to 0x00810000
Flash checksum does not match, reading flash data is necessary.
Requesting upload from ECU for address range 0x00800000 to 0x0080FFFF.
Request upload from ECU failed, ECU reports service is not supported. Request upload may have been disabled by aftermarket engine software.
Reading ECU flash memory failed. Trying to force ECU to recognize read operation is complete.
Finished forcing ECU to recognize that failed read operation is complete.
Reading ECU flash memory failed.
100% complete.
Restoring Windows sleep mode.
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sounds like someone chipped this car or had a trial tune put on it. so it will need to be flashed with a stock file to overwrite the non-stock software in boot mode iirc.

EDIT: just saw the deal about the PO. skipped straight to the log, sorry. Immo is a tricky beast, i think theres a thread going about it right now. it shouldnt matter though if its immo2. immo3 may be a different story.

did you try any other of the 29F800 layouts like the bb or bt?

if its a 2002 id be willing to bet that its a bb or bt and not a vanilla 29F800.

something to try at least.

MPPS = amt cartech obd2 flasher interface.

google it, or try ebay

A must-have for the SERIOUS persons.

Cheers,

PvL