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      TIPS & FEATURES AEuro-Forum - READ!!   10/25/2016

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34 posts in this topic

VIN: WBAVB76020NE95398
Production Month / Vehicle Year: July / 2007
Make: BMW
Model: 335
Engine: L6 3.0L Turbo N54
Transmission: Automatic 6-Speed
Mileage: 73735
Affected System: Electrical / Electronic Controllers / Control Units / System Control Communication
Description of Issue: NO Communication / MIL Light
Scan Tool: Autologic (Blue Box)
Related Repair History: None
Diagnostics / Tests Performed:

Car runs but in reduced power mode.

Using AL Bluebox there is no communication with ANY module in the car.
At diagnostic connector

  • Pin 16 B+
  • Pins 4, & 5 Grounds
  • Pin 9 shows activity at DME
  • Pin 7 has NOTHING

Checked continuity from pin 7 to JBE (X14271,  Pin33) OK.

Checked PT CAN resistance at JBE connector (X14272, Pins 1 & 2) 60 ohms. 

  • Scoped with Ignition ON, shows network activity although some spikes
  • Checked K CAN activity at JBE connector (X14271, Pins 29 & 31), shows network activity.

Thinking this is the JBE module taken a dive, not allowing any Gateway functions?

Thoughts or suggestions?

Regards

Chris

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I'd be interested if an OBDII scan tool would see anything, just to
confirm that it is not the scan tool.  You know, it's always the simple things?

The JBE, I believe, is the Gateway to this vehicle.  You may be on
to something, by your diagnosis so far.  And let's see.......the JBE??

YEP...........Good Chance.  Let's see what the others say.

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Functions of the JBE:

The JBE performs the following functions:

  • Gateway to diagnostic cable
  • Gateway between PT CAN and KCAN
  • Activation of the bi-stable relay for cutoff in the case of standby current violation (same as MPM on E60)
  • The relay is only fitted for certain optional equipment (e.g. CCC, MASK, TCU, ULF). If a bi-stable relay is fitted,
    an IBS is also fitted.
  • Power window functions (sensor system (depending on variant): Hall effect sensors 2 for passenger side at rear
    and 2 for driver's side at rear; switches:  Rear passenger door, driver's side at rear; drives: passenger side rear, driver's side rear)
  • Windscreen washers (contacts: reset contact at front, reset contact at rear; activation: relay for wiper stage 1 and
    wiper stage 2, rear wiper relay)
  • Central locking functions (activation of all drives)
  • Air-conditioning functions (sensor system (depending on variant): Automatic air recirculation control sensor,
    refrigerant pressure sensor, rear stratification control; activation (depending on variant: auxiliary water pump,
    water valve, control valve in the air-conditioning compressor)
  • Functions for instrument panel (sensor system: fuel level sensor 1, fuel level sensor 2, coolant level,
    washer oil level, parking brake switch)
  • DSC button (switch: DSC button)
  • Mirror/Washer jet heating (activation: Washer jet heating and basic version of the mirror heating, together
    via an internal electronic switch). Activation of mirror heating not if LIN mirrors are fitted. Then activation via
    LIN from FRM
  • Seat heating (activation: PWM signal for basic version of seat heating, driver's side and front passengers side).
    Not if seat module is fitted on corresponding side. Then activation via seat module of corresponding side
  • Heated rear window (activation: relay for heated rear window)
  • Headlight-cleaning system (activation: relay for headlight cleaning system)
  • Roller sun-blind (activation: electric motor for roller sun blind)

Picture0001.jpg

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Hi,
i don't remember which, but we had to use the short Autologic jumper cable to link to some of these cars.

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JBE is likely.  
Just make sure the connections are clean......NO corrosion or water allowed. 

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Hi guys, got an update on this.

Thanks Angelo for suggesting another tool. 
Using a GScan I could not access any modules using the BMW software, however with ODB2, I could gain access.

With that I had 1 fault present, P3090 - fuel rail pressure, minimum pressure incorrect. 
I started the car, it was now dead cold from overnight, and observed fuel rail pressure which was about 10000 kPa/idle
and the car was running fine. 

After about 2 mins the car went into reduced power mode, rail pressure was now at 500 kPa.

SO .... looks like I have 2 separate issues! (yay)

1. HPFP failing, causing the drivability/reduced power problem

2. Communication issue.  Still need to look into this more but I'm picking it's the JBE module not allowing
access through the diagnostic line. 
It appears that everything on the car works as it should so to me that says that the networks/modules are all talking
as they should, I just can't see that with a tool.

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P3090 (29F2) Fuel Rail Pressure Fallen Below Minimum Pressure
 

P3090 (29F2) Fuel Rail Pressure Fallen Below Minimum Pressure .jpg

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12 55 06 (01-01-2008) N54 DIAGNOSIS FOR DME FC 29DC & 2FBF - REVISED 
 

12 55 06 (01-01-2008) N54 DIAGNOSIS FOR DME FC 29DC_2FBF - REVISED 1.jpg

12 55 06 (01-01-2008) N54 DIAGNOSIS FOR DME FC 29DC_2FBF - REVISED 2.jpg

12 55 06 (01-01-2008) N54 DIAGNOSIS FOR DME FC 29DC_2FBF - REVISED 3 .jpg

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Got a new JBE control module for this and fitted it with NO change.  
Still NO Communication to any module, still can't auto identify or read VO.  

Any suggestions where to from here?

Cheers

Chris

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Can you scan the CAS and see the key??  Any Codes Related to communication
in the CAS Module.  If I'm not incorrect, the CAS is a Gateway Module in this vehicle.

This is a strange one.  CAN you SCAN the Entire vehicle WITHOUT the key inserted in the CAS??

I'm hoping the Autologic is not sending you down the wrong path.

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Time to go "harness-hunting". 

Some of these models (E90/E92/etc...) were known to develop open/short circuits in the CAN-bus due to
chaffing of the wiring-harness across sections of the body & frame.

Peter can probably dig up the Service-Bulletins on this. ?  

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Is your Autologic fully up to date?
Any bent pins on connector? OBDII side or Autologic side? The two ground pins on our AL connector have a
tendency to get BENT.

I have seen poor pin contact at OBDII cause a lot of issues with communications so its probably worth a look,
especially if the vehicle is happy and does not show any signs of a "bad" network.

Also, this is one of the vehicles that had issue with the main power lead going into JBE, I believe there may
have been a recall for this, or at least an SIB. There is a repair kit available for this.

JBE should be CGW on this vehicle.

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I believe that I mentioned the JBE WAS the Central gateway, but I wanted to just throw that out there
to confirm this.  Thanks David!

And that "Chaffing" Bulletin, is in the technical Library and the InfoServer, as the last time
we had this issue on a POST, I pointed the tech to the SEARCH Engine and he found it.

I have a great group of guys here. 
We are small in number, but we are Spartans in the fight!

Bring on the Persian Hoards!  "Molon labe" "Come and get them!"

Thanks guys!

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Can't scan any module in the car, either with quick test or individually, absolutely nothing.  
OBD2 will allow COMMUNICATIONS to the DME........but I'm sure that takes a different path, bypassing the JBE.

Yeah time to go back to the wiring.

No pins bent in the AL connector but I'll check out the OBD plug for any terminal issues.

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What about that B+ lead to JBE?

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At the OBDII connector:

Pin #1: Terminal 15 from CAS

Pin #6 & #14 CAN High / Low from JBE

Pin #16 - Terminal 30 from JBE

Pin #9 - DME

Pin #4 & #5 -GND

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Hi Jivi.
This is the earlier version, doesn't have terminals at pins 6 & 14 for CAN to the JBE.
It only has Pin #7 DME

BUT .... Pin #1, terminal 15 from CAS, should that have B+ with Ignition on?  
Currently there is nothing, hmmmm. 

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Picture0001.jpg

Picture0002.jpg

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Yes,
Pin #1 has to have 12VDC  with the key ON (This is terminal 15)

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Ah, so CAS may not be turning on T15, therefore no key on power.
NO communication with scan tool?
Makes sense!

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Try this, UNPIN the wire in slot #1.

Install jumper wire with pin from #16 to pin#1

See if you get communication

Then we can look at CAS and JBE for faults

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20 hours ago, Jivi Khehar said:

Try this, UNPIN the wire in slot #1.

Install jumper wire with pin from #16 to pin#1

See if you get comms.

Then we can look at CAS.JBE for faults

That would be easier if you were using a DLC Breakout box    http://www.automotivetestsolutions.com/dlc-breakout-box.html    i have an older one from AESwave    from around 1997 ....  https://www.aeswave.com/aes-linespi-smart-bob-p8754.html  

Mine predates the LEDs but is still very useful 

And in VW  land if you loose T15 or T30 to the DLC very often it is because the cigarette lighter fuse popped  because there is too much drain or a penny has been  inserted by a mischievous child .....

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breakout box odb2.jpg

Call Skip at Baum Tools: 800-848-6657

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3 hours ago, Jivi Khehar said:

breakout box odb2.jpg

Call Skip at Baum Tools: 800-848-6657

Yes, i have linked that very tool in previous posts. However, last night i could not find it in their search window tool

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I have 3 of these.

Works great & you get an extra 6ft of cable extension.

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