My 1999 convertible won't start. The dash lights up but when I turn it to start nothing. It was starting and running an hour earlier. Here are the codes:

58-SDM B1001 H
58-SDM U1301 H
58-SDM U1016 H
58-SDM U1096 H
58-SDM U1064 H
99-HVAC B0441 H
99-HVAC B0446 H C
A0-LDCM B2252 H
A0-LDCM B2202 H
A0-LDCM B2206 H
A0-LDCM B2208 H
A0-LDCM B2282 H
A0-LDCM B2284 H
A0-LDCM B2264 H
A0-LDCM U1255 H
A0-LDCM U1064 H
A0-LDCM U1096 H
A1-RDCM B2203 H
A1-RDCM B2283 H
A1-RDCM B2285 H
A1-RDCM B2263 H
A1-RDCM B2273 H
A1-RDCM U1255 H
A1-RDCM U1064 H
A1-RDCM U1016 H
A1-RDCM U1096 H
A6-SCM B2172 H
A6-SCM B2177 H
A6-SCM B2192 H
A6-SCM B2197 H
A6-SCM B0851 H
A6-SCM B0856 H
A6-SCM B2605 H
A6-SCM B2606 H
A6-SCM U1255 H
A6-SCM U1064 H
A6-SCM U1016 H
B0-RFA U1255 H
B0-RFA U1096 H
B0-RFA U1064 H
B0-RFA U1016 H
B0-RFA C2120 H

 

I reset the codes and still have these:

B0-RFA U1255 H
B0-RFA U1096 H
B0-RFA U1064 H
B0-RFA U1016 H
B0-RFA C2020 H
99-HVAC B0446 H C

 

Typo in my reply post:

B0-RFA U1255 H Serial Data Line Malfunction
B0-RFA U1096 H U1096 Loss of Communications with IPC
B0-RFA U1064 H Loss of Communications with BCM,
B0-RFA U1016 H Loss of Communications with PCM
B0-RFA C2120 H TPM System Malfunction (No Sensors Received)
99-HVAC B0446 H C Right Actuator Out of Range

What causes these?

 

Is this a “start and stall” or “no start” right now ??...I see a serial data line malfunction code on the RFA module (RCDLR) which if the serial data line (a single wire which allows all 12 modules to communicate with one another) has either 12 volts or a ground on it will not allow the car to start and creates all kinds of havoc...without a good ground on the module for instance Mr. Power wants “to get home” which is through ground..without it he’s jumping on the serial data line express train...LOL !!... with key ON does the fuel gauge go to empty, water temp gauge maxes out and power windows don’t work and all the DIC warnings scroll through ??...the funny thing is I see you have RFA “no comms” and an HVAC DTC...the HVAC control module and that RFA module (RCDLR) BOTH receive power from the HVACCON fuse #27...I wonder if that fuse is blown ?????

...just a SWAG !!...also you can just approach this as a simple “NO START” condition if that is what you have...possibly just low voltage to those 2 modules during cranking ??
also, the TPM DTC is associated with the RCDLR !!

 

I went out to troubleshoot the old girl (She's got 275K miles on her). I was checking the Fuse 27 and it was fine. I checked the rest just for SnG's. Then I went back and tried to start and she started right up. I remember that the windows did work but as to the rest of your questions, I wasn't able to check before it fixed itself. Here's what I think happened:

My car is parked outside until my garage is completed. I fell getting out of the car and messed up my hip really back a while back and didn't put the cover back on her. The top has a leak at the top of the drivers window. The little seal there is almost $200 so I have been putting off replacing it. Water got in and mildewed everything. I was finally able to get into her and cleaned the mildew up with some foam crap that my daughter gave me. I figure either the moisture or the cleaner must have shorted a switch or button somewhere. I have read that is generally the cause of this problem.

Now to fix that HVAC code. Hot air blowing out is not comfortable in this weather. For now, top down baby!...

Take Care C5 junkies!
Bugz

 

Dead again...

 

Now is it a "start and stall" ??...seems like it wants to start ??...with key ON is fuel gauge pegged on "E" and water temp maxed out ??... are you getting all the DIC warning messages...REP, low fuel etc...??...do the power windows work ??...for those who know...I'm seeing Seat Control Module !!

 

It doesn't try to start. Fuel gauge shows 2/3. Oil pressure shows 135 PSI. Water temp is fine. Getting all the DIC warning messages. The power windows work. It could be the Seat Control Module. The floor is awfully wet. Can I just unplug the seat module or would that create other problems?

 

FIRST off let's be very clear here...is it "cranking" and not starting or the starter isn't turning over the engine at all ??...Normally if you get power or ground on the serial data line you'll see the things I had mentioned but since you aren't seeing that (except for the DIC messages) I may want to look elsewhere...just turn the key ON and see if the fuel pump primes for 2 seconds...can you pull a plug wire off a coil pack and see if you have spark...hold the end of the plug wire close to a ground (engine block) and check while cranking...if good let's now see if you have fuel delivery...if you have Brake Kleen spray it into a vacuum line and try to start the car...if it runs or tries to run we have a fuel delivery issue...post results !!...if you are not getting spark or injector pulse (another check to do) it may be a crank sensor....usually with a crank sensor you will not get spark and also if you look at the Tach while cranking the Tach does not move !!...now getting back to the serial data line you can either unplug the connectors from the seat control module under the drivers seat and see if it starts OR find the 2 splice packs (Star Connectors pictured and shown jumped from BCM to PCM

that are to the left of the BCM...pop the "comb" (gray bus bar...squeeze the ends of it to remove) off the one with 4 wires and try to start the car...if no start go to the other connector and pop the comb off that one... the car will not start unless you jumper the light and dark green wires together (PCM to BCM)...all the modules are isolated except those 2....now see if it starts...basically we'll go for spark/fuel OR serial data issues !!

 

It's not cranking at all. I will head back over there and do the above in a bit.

 

If it's NOT cranking at all you DON'T have a serial data issue !!...everything above WON'T fix it !!...."My 1999 convertible won't start"...should have asked for more info !!

 

It would have to be the starter solenoid or something in the starting circuit like the clutch cutout switch, right? I need to get a book of diagrams for it, I think.

 

Here is the starting circuit for a 1999...you don't need a book !!