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big? problems on seville sls


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So i just bought an 02 seville sls from a small private owned dealership in medina ny for $1450 and thought i was getting a steal. He informed me about the faulty overdrive sensor but not that the defrost and front blowers hardly work but the car will get warm. The front passenger and rear driver windows don't roll down from the driver controls. And now the abs and traction control lights keep popping up but go away for awhile when i turn off the car and back on again. I was super excited to get my first caddy and still kind of an because the body and interior is mint and the engine seems mechanically solid. I am somewhat car literate having going to school for auto body but the in depth mechanics escape me. How bad is it really and how much will this hurt the wallet?

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I'm not aware of an "overdrive sensor" in these cars. Was your muffler bearing and canoe-tin valves OK?

With the key in the run position or the engine running (it makes no difference), simultaneously press and hold the ON/OFF and INFO UP buttons on the dash to the right of the speedometer and above the gearshift lever. The system will go through a segment check and then you will see ALL? on the driver information sensor (DIC).

To operate the diagnostics, the following buttons are used:

  • ON/OFF = Yes
  • INFO RESET = No
  • INFO UP/DN is the toggle to between systems
  • To exit the diagnostics, repeatedly press the INFO RESET button or turn the ignition to OFF.

Any codes will be displayed on the DIC as CURRENT or HISTORY.

The window issue may just be a bad master switch assembly at the driver's door.

As far as the transmission goes, I would not be surprised to find the PCM P0741 code either current or history. The codes will also point to the problem with the ABS and Traction Control lights. The blower issue may be a bad blower motor - it is much easier to replace the blower motor on the '98+ models of the Seville vs. the '93-'97 models.

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

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I think the 'overdrive sensor' issue refers to the famous TCC code. Maybe he'll get lucky and find a 1860 code too.

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I didn't check the blinker fluid either

LOL...

Check the codes as I described in my earlier post and report them back here. The codes will tell a lot about what's wrong.

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

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C1221

C1224

C1228

C1246

B3833

P0741

P1860

U1016

There should have been a three letter prefix in front of the codes. That is needed in order to properly identify the codes.

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

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C1221 LF Wheel Speed Sensor Input Signal is 0

C1224 RR Wheel Speed Sensor Input Signal is 0

C1228 RR Excessive Wheel Speed Variation

C1246 Brake Lining Sensor Open Circuit

B3833 Window Position Sensor Circuit

P0741 Torque Converter Clutch Circuit Performance or Stuck Off

P1860 Description Torque converter clutch pulse width modulation solenoid

U1016 Loss of Class 2 Communication with VCM

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Actually...it's good news. You can forget about most of those codes.

A code p1860 will cause a false PO741. A open TCC solenoid in the trans causes the P1860.

It's much better to have a P1860 and PO741 code together...then have a PO741 code by itself. A PO741 code alone is major work deep inside the trans.

That said, the pan on the side of the trans has to come off to replace the TCC solenoid. To get the side pan off, you have to drop the trans and engine assembly about 10-11 inches.

There is a video on youtube about replacing the TCC solenoid with the trans in the car. That said...better have a plan B ready if you use the video.

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The torque converter solenoid (TCC) has failed. That is under the transmission side cover. You can lower the trans or remove it from the car and replace the TCC - a big job but not that bad. You got the car for a very good price most likely the seller was afraid that it needed a new transmission and torque converter.

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

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I think we are posting on top of each other...

I think the P1860 is causing a false PO741....

I posted a pic of the bad solenoid....see yellow arrow. Note the engine/trans has been dropped about 10 inches to get the side cover off.

It would be worth the time to check the large transmission wire harness connector.

post-2-0-70247600-1391818450_thumb.jpg

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What?....the ABS codes? Maybe bad hub bearings or even unplugged..

Someone may have started to work on the car...

I would leave the ABS alone for now.

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Yeah, the wheel speed sensors are unplugged. I would begin with a thorough inspection, using the codes as a guide, looking for unplugged connectors and loose bolts.

CTS-V_LateralGs_6-2018_tiny.jpg
-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

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There are two blower motors for the 2002 STS, one with a detachable vent (output) tube that is re-used. Check the part number by VIN when you buy.

The blower motor is under the dash on the passenger side. Spelunking experience is a plus when replacing it.

The 2002 FSM gives this procedure for removing the blower motor.

  1. Remove the right side sound insulator (the cover above the foot room that covers the under-dash area).
  2. Pull back the carpet near the blower motor.
  3. Remove the glove compartment (see below for steps).
  4. Remove the DIM (dash integration module) from the bracket.
  5. Remove the two rear DIM bracket screws.
  6. Move the DIM bracket out of the way.
  7. Disconnect the wiring harness connector from the blower motor.
  8. If you have a detachable blower ventilation tube, pull it off at this point.
  9. Remove the three blower motor retaining screws for detachable tube, or four screws for non-detachable tube.
  10. Remove the blower motor. If you don't have the detachable tube, you will need to rotate the blower motor to remove it.

Installation is the reverse of these steps. The glove compartment removal steps are:

  1. Open the glove compartment door.
  2. Remove the audio/visual (A/V) adapter from inside the glove compartment.
  3. Remove the glove compartment lamp.
  4. Lift the glove compartment door just a bit and slightly twist the rod that holds it from opening too far about 1/4 turn to disengage it from the door.
  5. Remove the screws holding the compartment cavity to the dashboard. I think there are four.
  6. Work the compartment cavity partly out to expose the electrical connectors.
  7. Unplug the connectors and work the light/lens assembly out of the dashboard.
  8. Finally, pull the compartment cavity all the way out.

Installation is the reverse of these steps. Let me know if you need more FSM instructions or if you need pictures.

CTS-V_LateralGs_6-2018_tiny.jpg
-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

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Which one could be giving me the problems? I can hear one trying to work but no air is forced out. Since the windshield won't de fog i get to drive around with my window open in the balmy ny winter. Glad the heated seat still works

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