IceCreamisOK Posted October 20, 2013 Report Share Posted October 20, 2013 Hello everyone, new to the forum and I just bought a 1998 Cadillac Seville SLS, very nice car. However, the dash shows a message "speed limited to 90mph". I ran the OnBoard diagnostic, and received these codes: ABS C1252 ABS U1255 PCM P1520 PCM P1611 (history) PCM P1652 RIM B1009 So, I have no idea what any of these mean. Any ideas? Thanks in advance! Link to comment Share on other sites More sharing options...
Cadillac Jim Posted October 20, 2013 Report Share Posted October 20, 2013 ABSC1252 Left Front Normal Force MalfunctionU1255 Class 2 Communication Malfunction (Serial Data Line Malfunction)PCMP1520 Transmission Range Switch CircuitP1611 Loss of CVRTD Serial Data (HISTORY)P1652 Powertrain Induced Chassis Pitch (Lift/Dive) Output CircuitRIMB1009 EEPROM Checksum Error Since you label only one of these as HISTORY, then you seem to be saying that all the others are CURRENT. First, the abbreviations: ABS == anti-lock braking system PCM == powertrain control module RIM == rear integration module CVRTD == continously variable real-time damping (electronic shocks and struts) EEPROM == electrically eraseable programmable read-only memory The C1252, P1611, and P1652 are related and possibly the result of a network problem. The U1255 indicates a problem that may be the network problem that is causing the other codes. I would start with looking at the connectors and wiring for the front position sensors and the big connector to the EBTCM. The P1520 indicates a problem with the adjustment of one of the cables on the shifter. If the cable adjustment is OK, the switch that provides shifter position to the PCM may be bad. The B1009 probably means that the battery was disconnected recently. Unless this code is CURRENT, I would ignore it for now. If it is CURRENT, you should make sure that the fuses, connectors and grounds associated with the RIM are all good, and if you don't fix the code that way, look into replacing the RIM. I don't have experience with RIM problems; someone who does and has seen a B1009 will likely chip in. -- 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. Link to comment Share on other sites More sharing options...
IceCreamisOK Posted October 21, 2013 Author Report Share Posted October 21, 2013 Thank you so much for taking the time and helping me out, I appreciate it. Link to comment Share on other sites More sharing options...
Cadillac Jim Posted October 21, 2013 Report Share Posted October 21, 2013 That's what we do here. But, we are just getting started. Keep us posted. -- 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. Link to comment Share on other sites More sharing options...
PAUL T Posted October 25, 2013 Report Share Posted October 25, 2013 On you ABS codes check to see if there are any plugs unhooked at the wheels, especially the left front. Link to comment Share on other sites More sharing options...
Cadillac Jim Posted October 26, 2013 Report Share Posted October 26, 2013 The road force estimation is a function of the RSS, the module that controls the electrically controlled damping and the ride height. I believe that its main input for road force estimation is the ride height sensors on each of the four wheels. There are two lines for sending this data to the EBTCM to assist in the ABS function, one for the left front wheel and one for the right front wheel. The 1997 FSM, pages 5E2-108 through 110 addresses C1252. The code is set when data sent between the CVRSS module and the EBTCM fails a sanity check. This data is sent on WHT and GRA wires from the CVRSS module, which go to C101, where the signals emerge on BRN an dLT GRN wires which go to the EBTCM. The first check is for breaks or shorts in these connections and wires. -- 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. Link to comment Share on other sites More sharing options...
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