ECU CEL questions.
#1
ECU CEL questions.
I pulled my airbags along with my ABS controller, and I will be switching to a new fuel tank so there goes the evap canister. Is it possible through tuning to make the ECU forget that they were even ever there? Id rather not have all these lights on my dash, and if for some reason I do end up getting the truck registered I need for the whole dash to not light up like a christmas tree
#3
The PCM has switches in the calibration that can be set on or off for certain hardware and CELs. I'm not sure what's available in your calibration but my guess is that turning off CELs should not be a problem for a good tuner.
The restraint system and the ABS have their own modules and codes. The PCM is not involved. It should be possible to finagle a way around the dash light problems with a little imagination and a healthy disregard for the law.
Have you tried your speedometer without the ABS? For 98~2000, it won't work without it if the truck was originally equipped with 4WABS.
The restraint system and the ABS have their own modules and codes. The PCM is not involved. It should be possible to finagle a way around the dash light problems with a little imagination and a healthy disregard for the law.
Have you tried your speedometer without the ABS? For 98~2000, it won't work without it if the truck was originally equipped with 4WABS.
#4
The PCM has switches in the calibration that can be set on or off for certain hardware and CELs. I'm not sure what's available in your calibration but my guess is that turning off CELs should not be a problem for a good tuner.
The restraint system and the ABS have their own modules and codes. The PCM is not involved. It should be possible to finagle a way around the dash light problems with a little imagination and a healthy disregard for the law.
Have you tried your speedometer without the ABS? For 98~2000, it won't work without it if the truck was originally equipped with 4WABS.
The restraint system and the ABS have their own modules and codes. The PCM is not involved. It should be possible to finagle a way around the dash light problems with a little imagination and a healthy disregard for the law.
Have you tried your speedometer without the ABS? For 98~2000, it won't work without it if the truck was originally equipped with 4WABS.
So if some one where to plug into my OBDII port, for say emissions, how would I be able to get rid of the ABS and airbag codes that I would assume would be present? Or how do I fool the computer into thinking they are still working properly?
#5
An aftermarket flash tuner (like an SCT, for instance) cannot access the ABS and airbag codes because they are not stored in the PCM. That requires a dealer tool. It should be possible to wire those two indicators to some other indicator that comes on at start up for a bulb check - hypothetically speaking, of course.
#6
An aftermarket flash tuner (like an SCT, for instance) cannot access the ABS and airbag codes because they are not stored in the PCM. That requires a dealer tool. It should be possible to wire those two indicators to some other indicator that comes on at start up for a bulb check - hypothetically speaking, of course.
#7
#8
I guess what Im confused on is how they interact with the PCM. am I correct in thinking that a code reader would be showing some sort of code saying the airbag and ABS are malfunctioning in some shape or form. or is it that since the ABS mondule under the hood is gone that that light is on but no codes are being shown?
#9
I guess what Im confused on is how they interact with the PCM. am I correct in thinking that a code reader would be showing some sort of code saying the airbag and ABS are malfunctioning in some shape or form. or is it that since the ABS mondule under the hood is gone that that light is on but no codes are being shown?
A regular OBDII code reader only accesses the PCM and its codes. The diagnostics for the other vehicle modules can be accessed by using a dealer level tool through the same Data Link Connector as OBDII uses. The difference is that the other modules have their diagnostoc link on a different wire that doesn't go to the PCM. I don't know if the readers used at a state inspection station are sophisticated enough to access the diagnostics for the non-PCM modules.
#10
That is the Restraints Control Module.
To the best of my knowledge, the PCM doesn't know or care if the 4WABS Module or the Restraints Module are present or if they have any codes stored.
A regular OBDII code reader only accesses the PCM and its codes. The diagnostics for the other vehicle modules can be accessed by using a dealer level tool through the same Data Link Connector as OBDII uses. The difference is that the other modules have their diagnostoc link on a different wire that doesn't go to the PCM. I don't know if the readers used at a state inspection station are sophisticated enough to access the diagnostics for the non-PCM modules.
To the best of my knowledge, the PCM doesn't know or care if the 4WABS Module or the Restraints Module are present or if they have any codes stored.
A regular OBDII code reader only accesses the PCM and its codes. The diagnostics for the other vehicle modules can be accessed by using a dealer level tool through the same Data Link Connector as OBDII uses. The difference is that the other modules have their diagnostoc link on a different wire that doesn't go to the PCM. I don't know if the readers used at a state inspection station are sophisticated enough to access the diagnostics for the non-PCM modules.
#11
on the fuel canister, email doug at bamachips. I took my evap canister out, personally I didn't care about the light because we don't have emissions testing here.
Anyhow I got his tune and magically my check engine light went off and I no longer have codes for the evap canister.
Can you even read the ABS and restraints module from the odbii port?
Anyhow I got his tune and magically my check engine light went off and I no longer have codes for the evap canister.
Can you even read the ABS and restraints module from the odbii port?
#12
Originally Posted by zabeard
Can you even read the ABS and restraints module from the odbii port?
Originally Posted by rwenzing
A regular OBDII code reader only accesses the PCM and its codes. The diagnostics for the other vehicle modules can be accessed by using a dealer level tool through the same Data Link Connector as OBDII uses. The difference is that the other modules have their diagnostic link on a different wire that doesn't go to the PCM. I don't know if the readers used at a state inspection station are sophisticated enough to access the diagnostics for the non-PCM modules.
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11-17-2008 02:44 PM