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IPC Override of Option C & D


Dloch

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I'm trying to override the option data in C (S03) and D (S04) the problem I am having is getting the IPC/PCM to accept and save the new value.

I have a 97 STS which has an Analog Dash. The sevice manual says to hold the A/C and frt defrost buttons until the override value flashes, I get no flash. If I move to the next option and return to the one I just overrode it has reverted back to the existing value.

I have done an override in the past, Option E (S05) where I added Coolant Temp I believe. At the time I had trouble getting the override value to accept then also but evidently it did at some point because I got the results I wanted.

What I am doing is going into vehicle diagnostic mode, after the light up of all the dash lights and PCM shows up I press the fan switch down to stop the cycling through of all the systems. I then go to IPC and press the fan down swtich until I get to IPC override and then press the fan button up until I get to the option I want to change and the use the passenger warmer and cooler switch/button to get the option data value to the one I want, the this case I want to change the value of option C from 160 to 32 to drop the RSS present since I have changed all the shocks and I want to change option D from 8 to 136 to enable afterblow.

As I said after I have made the change and hold the A/C and frt defrost buttons I get no flash at which point the changes aren't accepted.

What am I missing?

Thanks

Dennis

Dennis
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I may be wrong but with OBDII you can not override any settings, Mike

Early on sailors navigated by the stars at night and the North star became the symbol for finding ones way home. Once you know where the Northstar is you can point your ship in the right direction to get home. So the star became a symbol for finding ones way home or more symbolically even finding ones path in life.

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I may be wrong but with OBDII you can not override any settings, Mike

Yes - you can override settings with OBD2. I used the overrides to display the speed and coolant temperature on the DIC of my '96 Seville.

I don't think you can disable the RSS suspension message with the overrides though.

Kevin
'93 Fleetwood Brougham
'05 Deville
'04 Deville
2013 Silverado Z71

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I may be wrong but with OBDII you can not override any settings, Mike

Yes - you can override settings with OBD2. I used the overrides to display the speed and coolant temperature on the DIC of my '96 Seville.

I don't think you can disable the RSS suspension message with the overrides though.

That's good to know, thanks

Early on sailors navigated by the stars at night and the North star became the symbol for finding ones way home. Once you know where the Northstar is you can point your ship in the right direction to get home. So the star became a symbol for finding ones way home or more symbolically even finding ones path in life.

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For Option C (IP S03) The values are;

RSS Present 128

"Premium Unleaded Fuel Only" Message Suppression 64

Always Add 32 Which has to do with the daylight running lights

Cellular Phone Present 16

BTSI Message Suppression 4

LOW FUEL LEVEL Message Suppresion 1

The current value is 160, which is RSS Present 128 and 32 for the Daylight Running. I want to drop the RSS present, 128 which leaves 32.

For Option D (IP S04) the values are;

Afterblow (HVAC Option) 128

Dual Zone (HVAC Option) 8

The current value is 8, I want to add the afterblow, 128 which would make the new value 136.

Guru with my dash, the analog IPC/dash, I don't have an Auto/Econ button.

Dennis

Dennis
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:blink: ..... DUH

I figured out what I was doing wrong. I was pressing the REAR defrost and A/C Buttons... :huh:

After pushing the correct buttons the new value did flash and was accepted.

As a test when I get a chance I will unconnect one of the shocks to see if I get the service suspension message and report back.

Dennis
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  • 3 years later...

I was searching, & came across this one. Is it true that the message can be suppressed? I recall people wireing in a resistor to solve this. I'm sure changeing an option on the dash would be easier for them. I don't have the problem, so I cannot verify it. I wish people would close up their questions

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