jerseyjoe10

My wife started her car today and went to pull out of the driveway and 4 brake lights and alarms were sounding. All brake warning lights are on red brake light, BAS/ESP light, ETS and ABS with alarm sounding while vehicle is moving, I checked the brake switch and the brake lights are working. Checked ABS 40 amp fuse and it is good.Turned steering wheel right and left numerous times lights are still on. Please help.

art_arev

Check your brake fluid level. Check the ABS Pump electrical connector. Did your windscreen washer reservoir leak at any time?
Also you MUST scan the car for codes. The lights you are referring to could ne on due to a number of reasons. It is very expensive to "guess fix" ML's.
Post the codes after the scan

Maj. Dundee

Check your brake fluid level. If it is low you have a leak somewhere or your brake pads are worn down very low.

Refer to post #6 in the link below.

https://mbworld.org/forums/m-class-w...ml#post5265553

jerseyjoe10

I checked the brake fluid and it was at the proper level, I will have to check the brake pad thickness, I will also have a code reader Monday to see what codes are in the system.where is the electrical connector for the ABS pump? I did check the fuse. I also did not have a washer res leak. Thank you for the reply. Joe

jerseyjoe10

Update.... Took my ML350 to auto zone to read brake codes no codes logged. while driving noticed heater fan not coming on????? Had them check the battery and it was down to 8 volts charging system was working... read in the owners manual that if voltage goes below 10 volts brake light, ABS, BAS/ESP 4ETS lights will come on. Replaced battery now heating fan is running at high speed but brake light, ABS, BAS/ESP 4ETS lights are still on. How do I reset brake warning lights? Please help Thanks Joe.

art_arev

Try turning the steering fully one side then the other. Do that for about 4-5 times. That will reset the steering angle sensor. If you still have the lights clear the codes.

jerseyjoe10

Art, Thank you!! tried to turn the wheel to reset steering angle sensors 5 to 10 times twice NG, Disconnected battery again to try to reset N/G again turn steering 10 times N/G. Too cold right now to check brake pads 20 degrees & snowing I think I changed the pads less than 20,000 miles ago can't be sure. Any other checks I can perform before that? Advanced Auto stated there were no codes, I will bring reader home from work tomorrow to see what that shows. Thanks Joe.

art_arev

If the lights are on there must be codes. Find someone with a pro level scanner & you will have codes. 1000000% guaranteed. You will have a code in ESP & a corresponding code in ETC etc......
PS. I hope auto zone hasn't scanned only the brake system as you mentioned above. You need to scan all systems.

Maj. Dundee

art is correct, there must be codes. The scanner that they use will only read engine codes and not ABS codes.

jerseyjoe10

Art & Maj,


I Picked up an Innova reader/scan tool from work that pulls up ABS codes. I will scan the car tonight and see what codes come up.


Thanks Joe.

jerseyjoe10

OK, I have the following ABS codes logged and could not clear any of them. All lights still on. Red brake light with alarm when the truck is moving. ABS, BAS/ESP, 4ETS.

1) C1181 Steering Sensor
2) C1210 ABS STORE Active
3) C1024 CAN EGS Sync Trans
4) C1174 Steering angle sensor.
5) C1012 ABS present term 87 over voltage

What should I check first?



Any help would be appreciated! Thanks Joe

jerseyjoe10

another note when i had my battery and charging system tested battery was low, cranking dropped below 10 volts, charging system was tested and it was 14.32 no load and 14.27 loaded.

jerseyjoe10

I went back out to try to clear the codes again this time they cleared after I started the truck:... This time after i cleared codes I started the engine and all the ABS lights went out. Took it for a quick drive and lights are still out. I will have my wife drive the truck for a couple of days and see if any codes come back.I can't believe all these codes were battery related?? I am just glad all the lights and buzzers are off.

art_arev

Well done!!!
You need to own a Pro level scanner. Think about investing in one.
If you will need help to choose one, we are here............

jerseyjoe10

Ok boys need your help again.... I drove the car yesterday no problem, thought all was good after battery replacement and clearing of codes. Went to drive the truck today and all the lights and alarms came on again before i left the driveway. I did replace the battery because it tested that it needed a charge and on the engine crank test the voltage dropped below 10 volts.I cleared all the ABS codes the other day to get the lights out. had 5 codes as stated above. Hooked up the reader tonight and now I only have one code and need some help. Right now there is only one code on and that is C1012 ESP & BAS controler is defective.Right now I tried to clear codes and can not it keeps coming back. Is there any other checks i can do or do i just need to replace the control module? Please help.. Thanks Joe

jerseyjoe10

looking on line it states C1012 is related to battery high voltage???? Is the alternator possibly over charging??? what is the max charging voltage? I stated during the battery charging test no load was 14.32 at .8 amps and loaded was 14.27 volts at .8 amps. I am wondering if the alternator is over charging and may damage my new battery. Thanks Joe.

art_arev

Joe, now that you have changed the battery measure the voltage when the car is off & during idle.

jerseyjoe10

Art, I will measure the battery voltage tonight. This is what I pulled off the scanner this morning when I downloaded to my computer. Could it be possible it is just the Alternator over charging? What is the max charging/ battery voltage?
Present C1012
1.control unit N45-5 (ESP and BAS control Module) is faulty
2. Control unit N47-5 (ESP and BAS control module) is defective.
3. Over-voltage during operation
4. Over-voltage #8 during operation
5. Terminal 87 has overvoltage
6. Terminal 87 overvoltage
7. Overvoltage at terminal 87
8. Overvoltage at terminal 87 fault in operation
9. Fault in operation

jerseyjoe10

OK now I am at a loss.... My wife move the truck today why I don't know. Just received 8 inches of snow. I checked the battery before starting and it was at 12.44 volts check with a fluke multi meter. Started truck no abs lights on????? I could not clear them last night. Hooked up reader and code was still on reader and could not reset but lights were still off??? Checked voltage at idle and it was 12.56 volts, put on heater fan and lights dropped down to 14.47 volts. what now?? Thanks Joe. I will drive the truck and see if the code and lights come back I am sure they will I wanted to check the charging system when the lights were on and i could not reset them... Please help.

turk723

Jerseyjoe I'm not as knowledgeable as some of the other however I'd like to ask did you check your cable lines leading to your battery positive and negative seeing that the vehicle is a 2004 there may be corrosion

art_arev

Joe there seems to be confusion with the voltage.........Measure the battery when the car is off. Then measure the battery when the car is idling/on without heater or anything else.

jerseyjoe10

Art, Yes,
With the car off the battery voltage was 12.44 volts
With the car started and at idle with nothing on it was 14.56 volts


Thanks

jerseyjoe10

Art,


Sorry I had one of the reading wrong in my post last night.


OK now I am at a loss.... My wife move the truck today why I don't know. Just received 8 inches of snow. I checked the battery before starting and it was at 12.44 volts check with a fluke multi meter. Started truck no abs lights on????? I could not clear them last night. Hooked up reader and code was still on reader and could not reset but lights were still off??? Checked voltage at idle and it was 14.56 volts, put on heater fan and lights dropped down to 14.47 volts. what now?? Thanks Joe. I will drive the truck and see if the code and lights come back I am sure they will I wanted to check the charging system when the lights were on and i could not reset them... Please help.

art_arev

Figure at idle looks high. 13,8 - 14,2v are "normal range. Try one more thing. Ask your wife to rev the engine ( not excessively) & measure the voltage. Lets see if it goes over the "norm".

jerseyjoe10

OK code C1012 is back on and now will not clear.Present C1012
1.control unit N45-5 (ESP and BAS control Module) is faulty
2. Control unit N47-5 (ESP and BAS control module) is defective.
3. Over-voltage during operation
4. Over-voltage #8 during operation
5. Terminal 87 has overvoltage
6. Terminal 87 overvoltage
7. Overvoltage at terminal 87
8. Overvoltage at terminal 87 fault in operation
9. Fault in operation
Battery voltage before start today 12.2 Volts. Started at idle went to 14.3 raised rpm to 3000 rpms and voltage stayed at 14.3 no increase. Drove the car this am all was fine... went back out and started down the street and all the lights came back on.Anything else I can check before i bring it to the dealer and pay out the nose? Terminal 87? Please help Thanks joe.