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+--- Thread: marelli 8p.13 HCP11A1V read with upa (Citroen xantia) (/showthread.php?tid=47399)
marelli 8p.13 HCP11A1V read with upa (Citroen xantia) - victorysatgr - 01-03-2019
hi
i try to read an old ecu of Citroen xantia iaw 8p.13 with mc68hcp11a1vfn, i connect upa according mcu datasheet,
but i cant read it, i have low voltage at MODB 1.14V
I have to lift a pin? any photo of connections?
Thank you.
RE: marelli 8p.13 HCP11A1V read with upa (Citroen xantia) - victorysatgr - 02-03-2019
Solved.........
RE: marelli 8p.13 HCP11A1V read with upa (Citroen xantia) - raffy haddad - 02-03-2019
Can you share how ?
Regards
RE: marelli 8p.13 HCP11A1V read with upa (Citroen xantia) - zmann - 03-03-2019
(02-03-2019, 17:51 PM)raffy haddad Wrote: Can you share how ?
Regards
I don't know what method the op has used but by his first image there was problem with MODB. This can be explained by the pulling down power of UPA pin6 is not enough to pull the voltage of MODB pin down to nearly 0 volt. Correction can be simplified as connecting MODB , MODA and VSS pins altogether and connect only UPA pin5 to them while UPA pin6 and pin8 can be left unused.
RE: marelli 8p.13 HCP11A1V read with upa (Citroen xantia) - victorysatgr - 03-03-2019
............................................