[GreekboyD]

My buddy has this issue. Looks like glow plugs #1 and #5 need to be replaced. Is there a diagram of where they are located on our 335d vehicles?:



Thanks!

[GreekboyD]

I came up with this but he wants to know the sequence and location of each glow plug:

Link

[Brad335d]

4A5F - P066D

Information saved in
DDE

Fault code
4A5F - P066D

Fault text
DDE: Glow control unit: Glow control unit, output stage,
cylinder 2, faulty

Fault description
The preheating control module detects a defective output
stage for activation of the glow plug at cyl. no. 2.

Condition for fault identification
Test condition:
The LIN message is transmitted every 500 ms.
Voltage condition:
The LIN message is transmitted every 500 ms.

Condition for fault memory entry
Debounce (1200 ms)

Action in service
Replace glow-plug preheating control module.
Replace glow plug 1.

Fault effect and breakdown warning
Poor starting at low temperatures.
Proceed to the nearest BMW Service facility.

Driver information
Warning light:
MIL

Service instruction
Remove glow plugs with engine warmed to normal
operating temperature to avoid damage to the cylinder head.

© 2014 ALLDATA LLC. All rights reserved. Terms and Conditions



4A1F - P067F

Information saved in
DDE

Fault code
4A1F - P067F

Fault text
DDE: Glow control unit: Glow control unit, output stage,
cylinder 6, faulty

Fault description
The preheating control module detects a defective output
stage for activation of the glow plug at cyl. no. 6.

Condition for fault identification
Test condition:
The LIN message is transmitted every 500 ms.
Voltage condition:
The LIN message is transmitted every 500 ms.

Condition for fault memory entry
Debounce (1200 ms)

Action in service
Replace glow-plug preheating control module.
Replace glow plug 1.

Fault effect and breakdown warning
Poor starting at low temperatures.
Proceed to the nearest BMW Service facility.

Driver information
Warning light:
MIL

Service instruction
Remove glow plugs with engine warmed to normal
operating temperature to avoid damage to the cylinder head.

© 2014 ALLDATA LLC. All rights reserved. Terms and Conditions

[Brad335d]

RELATED TSB ON GLOW PLUGS:




SI B13 12 10
Fuel Systems
January 2011
Technical Service
This Service Information bulletin supersedes SI B13 12 10 dated December 2010.

[NEW] designates changes to this revision

SUBJECT
Various Glow Plug and Glow Plug Control Unit Faults Stored in DDE
MODEL
E90, E70 with M57Y engines
[NEW] SITUATION
The vehicle may exhibit a long crank or rough idle in colder ambient temperatures. The Service Engine Soon lamp is on.
One or more of the following faults can be stored in the DDE:

^ 4A1F combustion preheating control unit output stage cylinder 1 faulty
^ 4A2F combustion preheating control unit output stage cylinder 2 faulty
^ 4A3F combustion preheating control unit output stage cylinder 3 faulty
^ 4A4F combustion preheating control unit output stage cylinder 4 faulty
^ 4A5F combustion preheating control unit output stage cylinder 5 faulty
^ 4A6F combustion preheating control unit output stage cylinder 6 faulty
^ 494A combustion preheating control unit, diagnostic feedback
CAUSE
Internal fault with the glow plug control unit
CORRECTION

If one or more of the above faults are stored, replace the glow plug control unit and all six glow plugs. Refer to Repair Instructions REP12 21 520 (glow plug control unit) and REP12 23 505 (glow plugs) for component replacement.



PARTS INFORMATION



WARRANTY INFORMATION

© 2014 ALLDATA LLC. All rights reserved. Terms and Conditions

[GreekboyD]

You rock Brad. Thanks man.

[Hoooper]

I hate to thread jack, but Brad can you look up alldata for 4BAC? You can PM me to keep this thread clean if you have it.

[Brad335d]

Sure since I don't know the year of you 335, I'll use a 2011 for the search, the codes are mostly all the same.

PM with the code description sent.

[mattm]

Can you look up this too:


Motor Control:

Engine / Motor
Glow plug
Code: 004A7E

Glow plug
Code: 004A09

Message failed
Code: 004A74

message fault
Code: 004A79

Receive news of IBS LIN-bus communication
Code: 0049A5

Any thoughts or suggestions? It would not clear the faults on a restart via Carly. It would clear the code while the car is on.

[copster3811]

Mattm, did you get an answer? I am have having the same problems... 049A5, 04A74 and 04A79.

[Owen81]

Lin-bus codes are usually due to the glow plug module. Replace it.

[mattm]

Yes, the glow plug module was swapped. And five months later, I sold the car. I was happy with cash in hand and seeing the taillights turn the corner.

[copster3811]

Thanks for the reply!

Your solution was also backed up by ISTA-D which I just obtained this week... Replace the module it is.

I just did the CBU, so I will have to take the intake back off...

[Owen81]

The manifold doesn't have to be removed to replace the module if you are good with your fingers:

[apexit4]

Can anyone confirm if code 4A0F indicates a failing glow plug control module? I tried a google search on the code but didnt come up with anything definitive.

[335stoner]

i could be wrong, but i think the "0" indicates the module. #1,2,3,4,5,6 indicates glow plug cylinder location.

from what i have noticed in the past with these cars if you are getting a glow plug then also check your coolant temps. FWIW so far with any of these codes i have not actually found a bad glow plug. replacing the module fix "bad" glow plugs. i Ohm them out and all read the same.

[apexit4]

Originally Posted by 335stoner

i could be wrong, but i think the "0" indicates the module. #1,2,3,4,5,6 indicates glow plug cylinder location.

from what i have noticed in the past with these cars if you are getting a glow plug then also check your coolant temps. FWIW so far with any of these codes i have not actually found a bad glow plug. replacing the module fix "bad" glow plugs. i Ohm them out and all read the same.

Thanks for the detail response. What kind of readings do you typically see when you Ohm them out?

[335stoner]

Originally Posted by apexit4

Thanks for the detail response. What kind of readings do you typically see when you Ohm them out?

.6 i don't remember the exact read out if it was ohm, kilo or mega

a glow plug is a simple heating coil. few things when reading them... for the most part as long as it they all read about the same or doesn't read dead short or open.

if one is bad it should be clearly out of whack to the rest of them.. if you read the comments in my video linked you i tell someone how to get a glow plug reading with the intake on from the wire harness along with what wires are to which glow plug.

[Chief Orman]

Just to reiterate...don't replace the glow plugs just the module...

[Based335d]

+1 replacement of module cleared error 4A5E.