[J21J]

Hi, I've got an E90 318d with the M47 engine. It cranks but does not start. The car has been to a garage but they couldn't get to the bottom of it.

The 2 fault codes of interest are 3E90 crankshaft sensor signal and 4C18 message error terminal 15 CAS.

They tried a new crank sensor amongst other things and it didn't work.

I've got access to a snap on diagnostic and inpa however I was hoping someone has a link for downloading ISTA as apparently it has a troubleshooter.

Any help and advice would be much appreciated

[ctuna]

Diesel support will be limited here as we didn't get them in the US for the e90
series. Also there is a diesel subforum here. Some versions of Ista online may
be limited to . Suggest going to the coding subforum if you have issues.

bmw boards and links
https://www.bimmerfest.com/forums/forumdisplay.php?f=99
https://www.e90post.com/forums/forumdisplay.php?f=27
https://www.e90post.com/forums/forumdisplay.php?f=2
https://www.e90post.com/forums/forumdisplay.php?f=122
https://www.e90post.com/forums/forumdisplay.php?f=368
https://www.e90post.com/forums/forumdisplay.php?f=16
https://bimmerretrofit.com/store/
https://www.e90post.com/forums/forumdisplay.php?f=378

diagnostic manual ista/inpa
https://www.google.com/url?sa=t&rct=...xo19teM9vkTF-C
https://www.google.com/url?sa=t&rct=...7x8H3pN8h1fMuF
https://bimmerprofs.com/diagnostics-inpa-part-1/
https://www.google.com/url?sa=t&rct=...lkXEhlQYy4i9Nb
https://www.bimmerforums.com/forum/s...-P-actually-do
https://www.bimmerfest.com/forums/at...1&d=1590283589
https://www.google.com/url?sa=t&rct=...kBbC27TJLX3BGe
https://www.google.com/url?sa=t&rct=...WekqhcC6hsgK2c
primary links
https://www.e90post.com/forums/showthread.php?t=1681573
https://www.nathansbmwworkshop.com/b...or-dean-videos
ista problems
https://www.e90post.com/forums/showthread.php?t=1661945
https://www.e90post.com/forums/showthread.php?t=1581663

[J21J]

Thanks for the pointers

[gbalthrop]

Originally Posted by J21J

... E90 318d ... M47 engine. It cranks but does not start... 2 fault codes of interest are 3E90 crankshaft sensor signal and 4C18 message error terminal 15 CAS... I've got access to a snap on diagnostic and inpa however I was hoping someone has a link for downloading ISTA as apparently it has a troubleshooter...

If you already have INPA installed, and a K+DCAN Cable, I would connect INPA to vehicle and View/Save/Post the following Screens as 1st step of Diagnosis:
1) INPA > Functional Jobs > F2 Identification;
2) INPA > Functional Jobs > F4 Error Memory, ALL Modules.

See attached pdf's for:
1) 'E9x References', which provides links for downloads of INPA, E89 Datens & ISTA, ALL from MEGA.
2) 'INPA Tutorial Quickstart' which contains ScreenPrints of those two INPA FJ Screens, HOW to view them, and HOW to Save/Post them.

After checking current Fault Codes, the NEXT Steps would be to connect to DDE and get: (a) Fault Details & (b) Freeze Frame Data (Snapshot of engine/ DME conditions at moment fault code saved). AFTER having viewed and SAVED all Fault Details, CLEAR Fault Codes and see what returns, repeating the Fault Details View/Save/Post.

Here is the INPA Menu Path to view DDE Fault Details. Since I don't have a DDE (rather: DME on N52KP) the Menu Path below is for my MSV80 DME. The path will likely differ for your DDE 5.0 or DDE 6.0, depending upon which M47 version you have, but the general Menu organization should be similar:
INPA > DDE 5.0/6.0 (M47 TU/TU2) > F4 Error Memory > F1 Read Error Memory > F3 Error Memory with Freeze Frame Data

On my MSV80 Variant DME, there are THREE different levels of detail related to Fault Codes, and "F3 Error Memory with Freeze Frame Data" has the MOST Detail. There will be a LOT of Technical German on the Screen, but Google Translate does a decent job, IF you know "Technical English".

The FIRST suspect in any "Crank, NO Start" situation is Power Supply to the DDE. The DDE Main Relay and the 4 fuses it powers, to power the DDE, are all located in the "E-Box" under the Bonnet/Hood. Please provide Last-7 Characters of VIN, so we can provide correct ISTA wiring diagrams. If you install ISTA, you can view those documents WITHOUT being connected to vehicle.

If you will attach those INPA ScreenPrints we can suggest "Next Steps". INPA actually offers MORE DATA than ISTA, so I would BEGIN with that, since you already have it installed.
George

[J21J]

I was hoping you would arrive George. you are something of a legend I have read many threads where you have helped others experiencing electrical issues similar to mine.

Thanks for the links I have a good base now to start on.

[J21J]

The last 7 digits of the VIN, VC13482

[lnxguy]

Are you getting RPM while cranking? OEM or bust for the CPS as well.

[J21J]

No rpm while cranking. No fuel seems to be coming but I don't know if that's because of the no crank signal.

[gbalthrop]

Originally Posted by J21J

No rpm while cranking. No fuel seems to be coming but I don't know if that's because of the no crank signal.

Your Fault Codes in Post #6 indicate all 4 Glow Plugs NOT heated/activated, and Crankshaft Sensor Signal NOT received. Since the DME supplies power to the Crank Sensor (B6203) AND the Glow Control Unit (A2402), the 1st thing I'd check:
1) Is DDE Main Relay (K2003a) being Activated when Ignition ON?

INPA, F6 Activations, should quickly show if that relay is being activated to power the DDE. Attached to NEXT Post are INPA ScreenPrints from my MSV80 DME, showing the F6 Activations, GROUP 2 Menu, and also the Activation Screen for the Relay. Wiring Diagrams for YOUR 318d, M47 are also attached, showing the specific connections for the 2 wires to A2402, and 3 wires to B6203.

Also shown are the Location (in the E-box under Bonnet) of the Main Relay and the fuses F01-F04 on the fuse carrier, A8682. So you can test if relay working, or if Fuses (F03 particularly) are powered by relay. If you would like test suggestions, please let me know, reporting what done/determined to date.

I would open INPA > DDE 6.0 > F6 Activations and search menu(s) for DDE Main Relay (KL87) Activation. Terminal 87 is the terminal powered when the Main Relay is activated (Ignition ON). When you see a fuse or component power supply diagram with "87" above it, that indicates supply is switched by terminal 87 or DME/DDE Main Relay.

When you first open the INPA KL87 Activation Screen, you are simply observing DDE Main Relay Status and voltage (if any ;-) while under DME control. If you have NO voltage and the "Status" is NOT ON (empty circle), then try pressing F1 to Activate the relay. Let us know what you find and we can suggest "Next Steps". Also, Note the Brown Ground wires, which are as important as Voltage Supply.
George

[gbalthrop]

Attached are ISTA ScreenPrints of my MSV80 DME KL87 Activation, identified in prior post, & related to 318i, M47.
George

[J21J]

Originally Posted by gbalthrop

Your Fault Codes in Post #6 indicate all 4 Glow Plugs NOT heated/activated, and Crankshaft Sensor Signal NOT received. Since the DME supplies power to the Crank Sensor (B6203) AND the Glow Control Unit (A2402), the 1st thing I'd check:
1) Is DDE Main Relay (K2003a) being Activated when Ignition ON?

INPA, F6 Activations, should quickly show if that relay is being activated to power the DDE. Attached to NEXT Post are INPA ScreenPrints from my MSV80 DME, showing the F6 Activations, GROUP 2 Menu, and also the Activation Screen for the Relay. Wiring Diagrams for YOUR 318d, M47 are also attached, showing the specific connections for the 2 wires to A2402, and 3 wires to B6203.

Also shown are the Location (in the E-box under Bonnet) of the Main Relay and the fuses F01-F04 on the fuse carrier, A8682. So you can test if relay working, or if Fuses (F03 particularly) are powered by relay. If you would like test suggestions, please let me know, reporting what done/determined to date.

I would open INPA > DDE 6.0 > F6 Activations and search menu(s) for DDE Main Relay (KL87) Activation. Terminal 87 is the terminal powered when the Main Relay is activated (Ignition ON). When you see a fuse or component power supply diagram with "87" above it, that indicates supply is switched by terminal 87 or DME/DDE Main Relay.

When you first open the INPA KL87 Activation Screen, you are simply observing DDE Main Relay Status and voltage (if any ;-) while under DME control. If you have NO voltage and the "Status" is NOT ON (empty circle), then try pressing F1 to Activate the relay. Let us know what you find and we can suggest "Next Steps". Also, Note the Brown Ground wires, which are as important as Voltage Supply.
George

Unfortunately my DDE 6.0 doesn't seem to have an option in INPA to check KL87.

How can I check K20003a is being activated. Is the red wire coming into K2003a on terminal 30 carrying 12 volts? So presumably I should check terminal 87 is carrying 12 volts exiting the relay with a multimeter? What about the ground on terminal 85, how can I test the integrity of this?

Suggestions for A8682 would be appreciated.

[J21J]

I have attached a CAS status screenshot. Voltage Hall12 and VoltageHALL34 will flicker very briefly with around 10.5 volts every few seconds with just the ignition on and no attempt at starting. Is this abnormal?

[Tambohamilton]

Might be an overly basic suggestion, but 11.44v is weak...tried charging?

[gbalthrop]

Originally Posted by J21J

I have attached a CAS status screenshot. Voltage Hall12 and VoltageHALL34 will flicker very briefly with around 10.5 volts every few seconds with just the ignition on and no attempt at starting. Is this abnormal?

THAT is NORMAL. I'm NOT sure what the two Hall Sensor Voltages actually represent, but my N52K 328xi has ALWAYS done that. NEVER a steady voltage on either Hall Sensor Bar Graph/ Value.

If you do NOT have a DDE KL87 Screen in F6 Activations, Check EACH of your F5 Status Screens. On my MSV80 N52K DME, the FIRST F5 Status Screen has KL87 Voltage in upper left display, just above RPM. On my MSV80 Menu Sequence, that path is:
INPA > DME (MSV80) > F5 Status > F2 Analog > F1 Measured Values Group 1

While one would like to see at least 12.0V reading for system voltage, If there is enough Voltage to crank the Starter, the engine SHOULD fire if the DDE Main Relay, Glow Plugs, and Sensors powered by the DDE are activated/ powered. ONE TEST you could do with the CAS screen you attached above:

1) with INPA CAS Terminal Diagnosis Screen displayed, watch the KL50 Voltage Value & Bar Graph as the Starter Cranks. On my N52K engine, the Voltage Drop (decrease in voltage) is ~ 2.0 Volts during Starter Cranking.

Your Diesel engine starter MAY have MORE draw & Voltage Drop than my N52K, but at least that will give some clues. What I DO SEE on your CAS Terminal Diagnosis Screen that causes concern:
You KLR (Terminal R or Radio) voltage is nearly 2 volts LOWER than KL15 or the Two CAS Fuses, KL30L & KL30E. My KLR voltage is always same or nearly so as KL15 or KL30G. The KL15 Wakeup is always a bit lower.

That causes some concern about the CAS Terminal Function, but at least the KL50 Start Signal is working. BTW, WHAT is your RPM during Starter Cranking (see F5 Screen suggested above)?
George

[J21J]

The brown wire from k2003a has 0.9 volts on it with the ignition on on. Is that pointing at a ground issue or is that normal?

With the ignition on there is 12 volts coming into k2003a via terminal 30.
There is 12 volts exiting k2003a via terminal 87.

There is 12 volts entering all fuses in A8682 & 12 volts at all 3 red & white wires exiting A2076.

I will check rpm during cranking next and voltage drop on CAS status on inpa.