Detailed mapping of Periphery bits underway
Apr 16, 2009, 08:14 PM
#66
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http://evoecu.logic.net/wiki/Periphery_Configuration
i updated the wiki, can you all check, if its all right?
i updated the wiki, can you all check, if its all right?
Apr 17, 2009, 11:14 AM
#69
Bit7 was listed in what I put together, due to the earlier mod that barryC put together.
Disabling bit 7 seems to mess with the comms (can't get fault codes from the ecu etc).
Disabling bit 7 seems to mess with the comms (can't get fault codes from the ecu etc).
Apr 17, 2009, 09:25 PM
#70
FCA bit 1 is listed as P0421 here, is the FCA bit 1 the only one related to this P0421 test? If so, I guess I can just turn this off to disable P0421 test without affecting other rear O2 related test?
I have a 200 cpsi metal cat, and I usually do not get this code, but I had this one when I was cruising on highway on a cool day.
I have a 200 cpsi metal cat, and I usually do not get this code, but I had this one when I was cruising on highway on a cool day.
Last edited by ace33joe; Apr 18, 2009 at 06:35 AM.
Apr 18, 2009, 06:26 AM
#72
Thanks for your input. So does AUDM EVO IX have a rear O2 sensor as USDM EVOs? I checked JDM Ralliart EVO VIII rom and those two bits related to rear O2 sensors were indeed off. I guess I will try it off and see if the light ever comes back. (Although I had the P0420 SES light only once so far and didn't come back yet)
Last edited by ace33joe; Apr 18, 2009 at 06:36 AM.
Apr 18, 2009, 12:30 PM
#73
Evolved Member
Yes, the AUDM9 has then rear sensor.
Aside from the tephra fix, the only other known fix is the sensor extender or positioning the sensor after the main cat.
I had a go at adding a 4k7 ohm resistor across the rear sensor, which did change/reduce the signal voltage. Have not had time to verify if this is an actual fix, though it looked about right on an oscilloscope.
Aside from the tephra fix, the only other known fix is the sensor extender or positioning the sensor after the main cat.
I had a go at adding a 4k7 ohm resistor across the rear sensor, which did change/reduce the signal voltage. Have not had time to verify if this is an actual fix, though it looked about right on an oscilloscope.
Apr 18, 2009, 12:42 PM
#74
merlin: mrfred and acamus were working on a patch to disable the heater check as well (actually, acamus had some working code for a relatively generic enable/disable scheme).
Although...thinking about this a bit more, wouldn't it be even simpler to disable the tests you don't care about entirely via the periphery, then use jcsbanks' DMA work to set any tests to a ready state, if OBD-II testing is a concern in your area?
Although...thinking about this a bit more, wouldn't it be even simpler to disable the tests you don't care about entirely via the periphery, then use jcsbanks' DMA work to set any tests to a ready state, if OBD-II testing is a concern in your area?
Apr 26, 2009, 08:14 AM
#75
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What does FAA Bit 0 do? SOmewhere in the last month I switched it from 0 to 1 in my ROM and want to know what it does and if it is contributing to some issues I am having? ROM = 96530006 Tephra 5.10.