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BMW 3-Series (E90 E92) Forum
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N52 cranks no start need some help (ista codes included)
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08-24-2018, 08:28 PM | #1 |
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N52 cranks no start need some help (ista codes included)
Final update:
Finally got her started again. Turns out the cylinder walls were flooded with gas from all the cranking. I put a cap full of oil down each cylinder, cleaned the spark plugs with carb cleaner then she started right up. Thanks for all the help everyone, I probably would have been stuck if not for all the help. This can be marked as solved if a mod sees this. For future reference, if you are trying to diagnose a bad fusable link with a multimeter, test for voltage with your key in the on position. This threw me off because with the key off, everything was getting power from the fuse. Update: no spark. starter turns turns turns Here is an updated scan after i fixed the issue with valvetronic. View post on imgur.com My indicators had already been broken before this and AUc is unplugged because all the plastic covers are out of the car. the only thing that stands out is the starter code but the car cranks everytime. the cranks are a little weak but it still sounds like it would start if it had spark. would a weak starter prevent spark?? i am not getting any crank sensor codes but ista did not pick up any engine movement while cranking. The no communication codes are also gone, i think those could have been caused by a loose battery cable not sure but they were all gone today. the car still did not start. Any help is welcomed Original post: Hey guys i have been trying to troubleshoot a no start on my 2009 e82. Im getting low voltage at valvetronic codes and no spark which makes me think its a wire harness problem. Im also getting a crankshaft position sensor code which would explain the no spark. I would just like some advice on what to do next before i start throwing parts at her thanks. Ista D scan Last edited by Uytre1234565; 10-23-2018 at 11:48 AM.. |
08-25-2018, 03:26 AM | #3 |
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Clear it and try again, nah but go through the test procedures for all the DME and EGS codes, that should really narrow it down
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08-25-2018, 07:55 AM | #4 |
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08-25-2018, 11:41 AM | #5 |
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[QUOTE=Uytre1234565;23638024...no start on my 2009 e90. Im getting low voltage at valvetronic codes and no spark which makes me think its a wire harness problem. Im also getting a crankshaft position sensor code which would explain the no spark.[/QUOTE]
Fault Code 2A94 = P0335 is telling you the reason your engine won't fire when the starter cranks. The DME uses the Crankshaft Sensor signal to time the pulsing of the injectors and timing of the ignition. Without that signal you have NEITHER spark from the coils/plugs NOR injector pulse. VVT faults would NOT affect spark NOR prevent starting. They COULD put you in limp mode. Remove the intake manifold, inspect the connector and associated wiring for the Crankshaft Position Sensor (next to the Starter) and if those are OK, change the Crank Sensor (~$90 with new bolt). Then record ALL code info (code #s & Freeze Frame Data) on ALL the codes you have. Clear ALL codes. Drive the car several times, and then check to see what codes have returned (581E EGS signal fault is almost certainly due to failing Crank Sensor & should NOT return). You have a LOT of codes there, time to start checking other things off the list when you get it running. I have NO idea why ISTA can't communicate with CAS, EKP or MRS (as shown in 1st 3 lines of your attachment). It would be interesting to know how many OTHER communication faults ISTA shows? Likely some type of bus/communication fault. However, the FIRST questions are: At WHAT mileage were the communication faults saved, and are they NOW present? Transmission fluid/filter needs changing. AUC (Outside Air Quality) sensor may be unplugged (veh. Right side of microfilter). George |
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09-25-2018, 11:52 AM | #6 | |
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09-25-2018, 02:49 PM | #7 |
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yes.
that's how the DME tells the fuel pump to run. it looks like there's a bunch of communications errors, including CAS. You could also have a security issue because of no communication. I'd start with trying to figure out why your entire can bus seems to be broken. |
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09-26-2018, 08:51 AM | #8 |
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If your CAS, has no communication it cant send the signal wire to release the starter to engage it. The fact that you multiple multiples not communication including the K-can and PT-Can along with DME internal faults. You have bigger issues ...Whats the history, any issues prior ?
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09-27-2018, 03:27 AM | #9 | |
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I'm having the same exact problems with similar codes. Back story: Recently changed my spark plugs and Coil Packs I used OEM Coils packs and NGK double Platinum spark plugs. The car was driving beautifully no problems.. prior I had this hesitation when I was accelerating .. but once I replaced everything the car was perfect. Last weekend I drove to Miami 3 hour drive and parked the car woke up the next morning and the car wouldn't start. It would crank but not start I have a brand new battery I replaced two months prior alternator was fine and at that exact point the car had no codes just would not start the next day i decided to jump it. The car started. I drove back the three hour drive with no problems woke up the next morning the car wouldn't start It would crank, start, and then immediately shut itself off. I tried jumping it again and didnt work i towed it to my shop. We changed out the crank shaft sensor now the problem has worsened the codes E598 9CB5 9CB8 A0B3 931D 9408 9C6C A0B2 93D0 CLEARED CODES NOW AFTER THE CRANKSHAFT SENSOR I HAVE THESE CODES 2A37 2A94 29E0 2A45 2A77 2A3F 581E 5E19 5E1A I cleared the second set of codes and the car started after that the car drove but in limp mode it was idling high revving on its own. not goog |
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09-27-2018, 06:53 PM | #10 | |
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The car recognizes the key and cranks every time so I think the CAS is fine, I’m thinking there might be an issue with the DME. I’ve checked all relays/fuses and everything looks good. I even have battery voltage at my coils so it’s just not sending the signal it seems. Thanks for all the replies! |
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09-27-2018, 10:10 PM | #11 | |||
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I know you said you checked fuses, but I would begin by rechecking fuses F11 (20A) and F37 (30A) per the attached TIS Circuit Diagram for the Valve Gear & Crank Sensor. This is the circuit for the components involved in timing DME pulse/activation of injectors & coils: https://www.newtis.info/tisv2/a/en/e...ording/vOpiTYU Also, you say you have checked for spark at one of the coils? Did you remove coil, attach spare plug to coil and ground plug threads -- should spark every two rotations of engine, ~ 2 times per second, during cranking. Coil connectors should have 12V+ at Orange wire, pin #3, of each connector, and that is constant voltage via F39 (30A) when Terminal 87 is active: https://www.newtis.info/tisv2/a/en/e...nition/vBlJ2fy Please let us know what you find, George |
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09-30-2018, 05:33 PM | #13 | |||
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Please let us know what you find, George Quote:
View post on imgur.com Fault codes View post on imgur.com View post on imgur.com Video of me spark testing |
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10-01-2018, 08:25 AM | #14 |
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Was your car affected by the B+ cable to the junction box recall?
Remove your glovebox and inspect the right hand side for brown burn marks around the middle of the right hand side. Going by your fault codes and control unit tree status, you have no wake up signal from the CAS to various control units (DSC, EKPS and no terminal R signal to the MRS (airbags). It would be worth checking Fuses 36 and 55 of the junction box https://www.newtis.info/tisv2/a/en/e82-128i-cou/iFlWSbX https://www.newtis.info/tisv2/a/en/e82-128i-cou/igwMrN7 These supply power to the CAS but if it accepts the key then I'd expect the fuse to be good. Also confirm you have an E82 128i per the VIN rather than an E90? Are these screenshots the latest? I only ask as the fault list appears different to your original one. I'm not sure of your experience with ISTA/D so I'm not sure how much guidance you require or if it would be better to truck the car to a dealer but i have a few other suggestions: Replace the battery with a fully charged known good battery but wait 5mins after disconnecting the existing one. Reset the 30gf relay in the Junction Box control unit functions. I am also concerned your FRM may have died from the battery going flat. Do your front windows and turn signals work? |
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10-01-2018, 10:21 PM | #15 | ||
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1) Car cranks but will NOT fire or even sputter 2) You have 12V+ at the coil Orange wires, Pins#3 of coil connectors 3) You get NO spark from external/grounded plug during cranking 4) You just replaced the CPS, but still have the same "Crank but NO start" symptoms. 5) You cleared P0335/2A94, Crankshaft Position Sensor Fault, presumably NO SIGNAL received by DME during cranking, after replacing the CPS, and STILL have that code recurring after clearing, presumably EVERY time you crank the starter(?) 6) The car in question is a 2009 E90 N52, and that is the vehicle I have been addressing and providing circuit diagrams for. BTW, does your OZS (Oil Condition Sensor) work to read "Static" oil level with just the ignition on? If NOT, then that would further confirm a power supply fault from F11 as further described below. So it appears that either (1) your CPS (Crankshaft Position Sensor) is NOT getting 12V+ via the Orange wire from F11 per the following circuit diagram, (2) there is a problem with the signal wire from the CPS to the DME, or (3) a wiring/connector issue in the E-box or JB, or a fault with K6300 relay at the JB: https://www.newtis.info/tisv2/a/en/e...1-fuse/vCFKEe3 These TIS circuit diagrams are interactive, so you can click on any BLUE component ID# and get additional info on that component such as Installation Location or Connector View. Using a DMM (Digital Multimeter) check for voltage on either side of fuse F11, and check for voltage at the MAF Sensor (that is the easiest of the components powered by F11 to access). Here is the Installation Location of the MAF Connector, X6207: https://www.newtis.info/tisv2/a/en/e90-328i-lim/SB2ajn6 Here is the Connector View, showing Pin #3 in the center of the connector X6207 where the Orange wire supplying 12V+ from F11 connects. Check for 12V+ there with ignition on: https://www.newtis.info/tisv2/a/en/e...i-lim/HROdZZ4V If you do NOT have 12V+ at Pin#3 of X6207, then test for voltage at each connector UPSTREAM to the DME: X6960 (common for ALL 6 components), X60551, X6041, ALL in the E-box (remember to use Installation Location & Connector View, along with the F11 circuit diagram, to properly identify the pin at which to test voltage. Finally, AFTER rechecking for 12V+ on BOTH sides of the F11 fuse socket in the JB (Junction Box), if NO voltage there, then check X11002 on the forward side of the JB (you have to disconnect box, see TIS Procedure), and check for proper operation of the K6300 relay. Here are the Installation Location and Connector View for X11002: https://www.newtis.info/tisv2/a/en/e...x11002/RHF7wVl https://www.newtis.info/tisv2/a/en/e...i-lim/CSyBytQ3 Please let us know how it goes, George |
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10-04-2018, 06:50 PM | #16 | |
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The car is an e82 sorry that was my mistake in the OP and those screenshots are the most recent. I checked the fuses and they are good. I could not find the 30gf reset in ista but While poking around, I found that terminal 15-1 was only getting .84 volts and terminal 50-E isn’t getting power at all. Could that cause the no spark? My windows and turn signals work. Everything seems to function. The only small thing I noticed was my window glass doesn’t automatically go up when I close the door. Last edited by Uytre1234565; 10-04-2018 at 07:09 PM.. |
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10-04-2018, 07:09 PM | #17 | |||
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5. The crankshaft sensor code rarely comes up now after i changed it (did not get any crank codes today while testing) 6. The car is a 2009 e82 n52 that was my mistake. Quote:
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Still stuck with a no spark no start. |
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10-09-2018, 02:57 PM | #18 |
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Update: figured out what was causing the low voltage at valvetronic codes. one of the fuses on the battery was faulty so I swapped the connector to another fuse. The valvetronic codes are gone now but the car still does not spark!!
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10-11-2018, 02:25 PM | #19 |
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Here is an updated scan after i fixed the issue with valvetronic.
My indicators had already been broken before this and AUc is unplugged because all the plastic covers are out of the car. the only thing that stands out is the starter code but the car cranks everytime. the cranks are a little weak but it still sounds like it would start if it had spark. would a weak starter prevent spark?? i am not getting any crank sensor codes but ista did not pick up any engine movement while cranking. The no communication codes are also gone, i think those could have been caused by a loose battery cable not sure but they were all gone today. the car still did not start. Any help is welcomed View post on imgur.com |
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10-13-2018, 08:54 AM | #20 |
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if the DME is not seeing engine RPM it will not fire the injectors or spark plugs.
that's the next issue. You're probably getting the starter error because the car knows it told the starter to go, but it's not seeing revs, so the car thinks the starter is dead. |
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10-20-2018, 07:01 PM | #21 | |
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So original problem was the fuseable link on the battery but during my diagnosis, I ended up killing my starter from all the cranking. I’ve replaced my starter but the Fuel pump seems to be dying down as well. I haven’t started her up yet( it got late didn’t want to get neighbors angry, she’s a little loud). But I will test on my next day off and update this thread when I get it started. |
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10-21-2018, 08:38 PM | #22 | |
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I the dme and Cas was out of synce...I had same error codes.. You need to synce the two...the car will not start until they are communicating..... If you are not getting any power to your dme starter wire in green harness in engine bay....it may be a synce issue. |
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