Smg cranks but no start

[Rod.bearings]

Ok from the codes I don’t think it is dme, shows that in my inpa codes. Would a pedal code affect my start?

it currently cranks because I coded out the clutch safety, I will try deleting ews

[George Hill]

If the SMG has low pressure then I don't think OP car can crank, but it does. I think he might have issue of EWS authenticating with the DME. He might need to code out the EWS.

Re-read what I wrote...

[sapote]

Here's my quick method to starting an SMG car with an SMG issue.

If the SMG has low pressure then I don't think OP car can crank, but it does. I think he might have issue of EWS authenticating with the DME. He might need to code out the EWS.

[George Hill]

Is the SMG computer plugged in? Did you connect one of the DME connectors to the SMG by accident?

Here's my quick method to starting an SMG car with an SMG issue. Connect everything like it should be, 100% and you'll need an EWS deleted DME installed. Then access the EWS module, disconnect the wiring harness, slightly trim a 20a fuse and stick it into the connector. The EWS connect has (2) big spade terminals that almost perfectly fit a fuse, what you have done is now bypassed the EWS and when you turn the key to crank the engine will crank. With the engine cranking the DME will see the engine RPM and start. *Note you can do this with a stock DME, but you have to be able to plug in the EWS connector to the module AND jump those wires, it's just a bit more of pain to do.

[eacmen]

Pulling at straws here…

Pull the ecu connectors out and inspect pins for corrosion and/or burn marks.

If you can still read codes from DME I don’t see how it would be in programming mode. Maybe the comm between cluster and DME is bad?

[oceansize]

I know it is a trivial thing and I'm sure you have checked but do verify that your battery is good. I've seen some weird stuff due to a low or bad battery.

Have you cleared the codes? I'm asking because there are some codes that will prevent the car from starting until cleared.

[Rod.bearings]

Little update. Checked the passenger engine ground it looks good. Pulled the blue DME relay and the "engine service soon" light disappeared so the relay seems to be good because most say the CEL doesn't light up when this is broken. 5 fuses inside DME box are good and also all the fuses associated with fuel pump and dme inside the glove box. I dont believe the DME is bricked but somehow its stuck in a flash mode or something.

[sapote]

Check the DME relay and fuses under the Ebox.

[heinzboehmer]

I tried a force program in winkfp, it flashed successfully but its still all the way hot. Next questions is will the DME even connect if their is a loose ground? Or whats a good sign the DME is bricked?

Try messing around with MSSFlasher, it's a pretty powerful tool. If your DME is bricked, you can probably get it back by BDM flashing it. This thread has some good info: https://nam3forum.com/forums/forum/s...lp-bricked-dme

Also, if you have access to another E46 M3, you could try swapping in their DME. Would need to sync/code out EWS, but it would be an easy way to verify that the DME is your issue.

[Rod.bearings]

I love your username, that's all.

Thanks haha, its my IG username too since I have a E92 M3 also

No codes? Temp sensors possibly? Have tried the hidden menu cluster test and I believe you can see the temp from there as well? Battery voltage is good? Checked your grounds?

Codes are attached in the photos. Next up is checking the grounds on the weekend. Ill try the hidden menu but I doubt a temp sensor is preventing a starting issue, could be wrong.

Tenp gauge all the way hot and crank but no start means the DME is in programming mode.

Did you try flashing stock manual software with winkfp?

I tried a force program in winkfp, it flashed successfully but its still all the way hot. Next questions is will the DME even connect if their is a loose ground? Or whats a good sign the DME is bricked?

[heinzboehmer]

Basically I am trying to figure out why my cluster temp gauge is red hot. Is my dme fried? Or is it not getting power via a relay/ground?

Tenp gauge all the way hot and crank but no start means the DME is in programming mode.

Did you try flashing stock manual software with winkfp?

[oceansize]

No codes? Temp sensors possibly? Have tried the hidden menu cluster test and I believe you can see the temp from there as well? Battery voltage is good? Checked your grounds?

[cobra]

I love your username, that's all.

[Rod.bearings]

Basically I am trying to figure out why my cluster temp gauge is red hot. Is my dme fried? Or is it not getting power via a relay/ground?

[Rod.bearings]

The SMG pump motor continuously runs as in never shuts off? If so that would mean it can’t build the required pressure so either seals, motor, accumulator, or pressure sensor is bad. No pressure no shifts. You should be able to monitor pressure from INPA.

Yea 99% sure it’s smg, but since I’m manual swapping if like to find a work around to start the car.

Usually flashing to manual via ecuworx and coding out the clutch safety should bypass the smg but since the cluster isn’t communicating with dme I have another issue