[shyne]

Hi

I recently picked up a 07 335i at 63k. Car drives nice, came with a couple problems that I hope to fix one by one.

I currently have a major fault with my climate control. I have 8 faults for the vent flaps. The climate control lights up and the knobs and buttons all work. The vents just aren't responding. It is currently stuck on defrost and max heat.

Codes:
9C48: Mixed air flap left (LIN)
9C49: Mixed air flap on the right (LIN)
9C4A: Fresh air / circulating air / dynamic pressure flap (LIN)
9C4B: Defrost flap (LIN)
9C4C: Footwell flap (LIN)
9C4E: Layering flap (LIN)
9C50: Rear ventilation flap (LIN)
9C52: Ventilation flap (LIN)

I also have two more LIN faults that I suspect may have something to do with this.

Roof Center Function:
DE8B: LIN error 0xDE8B

Rain sensor:
DE8B: LIN error 0xDE8B

I have tried to reseat connectors, and have confirmed that the motor is getting power.
Any tips?

[gbalthrop]

Originally Posted by shyne

I recently picked up a 07 335i at 63k. Car drives nice, came with a couple problems that I hope
to fix one by one. I currently have a major fault with my climate control. I have 8 faults for the vent flaps. The climate control
lights up and the knobs and buttons all work. The vents [Flap Motors] just aren't responding. It is currently stuck on defrost
and max heat. [8 Hex-codes for Flap Motors, 9C48 - 9C52]
I also have two more LIN faults that I suspect may have something to do with this. [Actually that is same DE8B fault Code saved
in Fault Memory of two different Modules, FZD & RLS]
I have tried to reseat connectors, and have confirmed that the motor is getting power.

Hi Neighbor! Welcome to the Forum!
Certainly low mileage for a 2007 Model. Please be aware that MAJOR electrical changes occurred effective 3/1/2007, in
MIDDLE of 2007 Model Run, so when posting with any issue related to wiring, electrical function, fuses, contents of E-box, etc.,
make SURE to indicate build Month/Year or preferably Last-7 Characters of VIN.

So we can give best advice for your current situation, as well as suggestions for improvements, please indicate what Scan Tool
or Diagnostic Software (INPA/ISTA) you have available, and if you have Laptop or Android Device.

You say "The climate control lights up and the knobs and buttons all work." If you have INPA, you can connect to the IHKA Module
and test that each button's signal is received by IHKA when the button is pressed. Such INPUT's to a Module can be tested
using INPA (or ISTA) in most any Module. HOW have you tested each IHKA "button". Technically the Flap actuation buttons
on the sides of the IHKA Control Panel are such buttons, and INPA DOES test their function, filling a circle when button pressed.

Do the Blower Speed buttons function to increase/ decrease blower speed? If the Defrost button on right side of Control Panel
were pressed, that should over-ride current blower speed setting and cause blower to run at 100% Speed. Similar thing should
happen when MAX button in center of Left T-stat is pressed. Just want to make sure we have isolated the CAUSE of your issue
to the LIN Bus Flap Motor Control.

When you say you have "confirmed motor getting power", which motor, and HOW did you confirm that? Measure system voltage
at X4706/4, Red Wire? Note that would ONLY confirm that X01198 is plugged into rear of IHKA Module, which supplied power.

First, I do NOT think the FZD & IHKA issues are related as the LIN Bus is a Local Interconnect Network (LIN) Bus and the
two listed, along with a 3rd LIN Bus between FRM & Mirrors are SEPARATE from each other, so that a fault in FZD/RLS
connection does NOT affect IHKA Flap Motor Function via IHKA LIN Bus.

What IS important to observe about the attached IHKA LIN Bus diagram:
1) The attachment shows ONLY the first four Motors in the LIN Bus "Series String", so that the pertinent portion is enlarged;
2) The LIN Bus Green wires are in SERIES (Left to Right), so that if there is an issue between the IHKA Connector, X01198/1 and
the Defroster Flap Motor Connector X4706/2, there is NO bus communication with ANY Flap Motor, including the Defroster
Flap Motor at the START of the Series Chain.

So I would FIRST inspect the X4706 Connector at the Defrost Flap Motor. ISTA says to first remove "Glovebox with Housing"
to access the Defrost Flap Motor. If you need procedure, please let us know.
George

[shyne]

Originally Posted by gbalthrop

Hi Neighbor! Welcome to the Forum!
Certainly low mileage for a 2007 Model. Please be aware that MAJOR electrical changes occurred effective 3/1/2007, in
MIDDLE of 2007 Model Run, so when posting with any issue related to wiring, electrical function, fuses, contents of E-box, etc.,
make SURE to indicate build Month/Year or preferably Last-7 Characters of VIN.

So we can give best advice for your current situation, as well as suggestions for improvements, please indicate what Scan Tool
or Diagnostic Software (INPA/ISTA) you have available, and if you have Laptop or Android Device.

You say "The climate control lights up and the knobs and buttons all work." If you have INPA, you can connect to the IHKA Module
and test that each button's signal is received by IHKA when the button is pressed. Such INPUT's to a Module can be tested
using INPA (or ISTA) in most any Module. HOW have you tested each IHKA "button". Technically the Flap actuation buttons
on the sides of the IHKA Control Panel are such buttons, and INPA DOES test their function, filling a circle when button pressed.

Do the Blower Speed buttons function to increase/ decrease blower speed? If the Defrost button on right side of Control Panel
were pressed, that should over-ride current blower speed setting and cause blower to run at 100% Speed. Similar thing should
happen when MAX button in center of Left T-stat is pressed. Just want to make sure we have isolated the CAUSE of your issue
to the LIN Bus Flap Motor Control.

When you say you have "confirmed motor getting power", which motor, and HOW did you confirm that? Measure system voltage
at X4706/4, Red Wire? Note that would ONLY confirm that X01198 is plugged into rear of IHKA Module, which supplied power.

First, I do NOT think the FZD & IHKA issues are related as the LIN Bus is a Local Interconnect Network (LIN) Bus and the
two listed, along with a 3rd LIN Bus between FRM & Mirrors are SEPARATE from each other, so that a fault in FZD/RLS
connection does NOT affect IHKA Flap Motor Function via IHKA LIN Bus.

What IS important to observe about the attached IHKA LIN Bus diagram:
1) The attachment shows ONLY the first four Motors in the LIN Bus "Series String", so that the pertinent portion is enlarged;
2) The LIN Bus Green wires are in SERIES (Left to Right), so that if there is an issue between the IHKA Connector, X01198/1 and
the Defroster Flap Motor Connector X4706/2, there is NO bus communication with ANY Flap Motor, including the Defroster
Flap Motor at the START of the Series Chain.

So I would FIRST inspect the X4706 Connector at the Defrost Flap Motor. ISTA says to first remove "Glovebox with Housing"
to access the Defrost Flap Motor. If you need procedure, please let us know.
George

Neighbors indeed! I am also in the area.
I am the second owner of the car now.
The last 7 of the vin are P033648 and the build date is 01/2007 according to mdecoder.

At the moment I only have access to bimmerlink to read and erase codes for the time being. I plan on getting a laptop and cable soon to gain access to INPA, ISTA, and DIS. Hope it helps me figure out the rest of the issues that came with the car.

The defroster and max buttons on the climate control work as intended, they change blower speeds to 100%.
I have previously already took my glovebox out to take a look at connector X4706 following advice from you in other threads with similar issues.
I confirmed there is voltage at the connector which made me come to the conclusion there is no BUS communication. I don't know where to find the reason for that.

Thanks for the help

[gbalthrop]

Originally Posted by shyne

... last 7 of the vin are P033648 and the build date is 01/2007... have access to bimmerlink... The defroster and max buttons on the climate control work as intended, they change blower speeds to 100%... took my glovebox out to take a look at connector X4706... I confirmed there is voltage at the connector [?] which made me come to the conclusion there is no BUS communication. I don't know where to find the reason for that.

I entered your VIN in ISTA, and the diagrams for IHKA I attached to prior post are SAME as for your 1/2007 build 335i E92.

When you say: "I confirmed there is voltage at the connector" (X4706), I presume you mean specifically: Battery voltage, 12.x V, at X4706/4, the Red wire at Socket #4 of Connector X4706? As I interpret the SSP wiring diagram, there is ALWAYS Battery Voltage at that Socket. The Motor is ONLY activated via the Flap Motor Electronics when a signal is supplied via the LIN Bus (Green wire at Socket #2).

So IF you have BOTH 12V+ at the Red wire (X4706/4), and Ground at the Blue wire (X4706/1), then you need a "signal" or message via the green wire to cause the Motor to CHANGE Flap Position. Since BMW did NOT consult with me prior to this design, I'm NOT sure how to detect the "Signal" from IHKA Module to the Flap Motors via the LIN Bus. ISTA offers a few clues.

I would think that if the Green LIN BUS Wire is connected to X01198/1 at the rear of IHKA Module, there is NO short to ground in that Green Wire, AND the IHKA Module is functioning properly (which by all indications it IS given Blower Speed control), then you SHOULD be able to Measure a change at X4706/2 (Green Wire). That would be a change in ONE, Some, ALL of the following when you press the Defrost Button on right of Climate Control Panel with Ignition ON:
1) Voltage measured with Red Meter probe on Socket X4706/2 and Black meter probe on Chassis Ground;

2) Change in "Duty Cycle"/ Frequency measured at same socket by more sophisticated Meter;

3) Change in Wave form using an oscilloscope.

I've never measured LIN Bus output myself, using ANY of those 3 devices. YOU are hereby appointed as 'Beta Tester'.

It is possible that the Green Wire is "Pinched' or Shorted-to-Ground at some place between X01198/1 & X4706/2 at the Defrost Flap Motor. So with both of those Connectors disconnected, test either end of the Green wire for continuity (~0 Ohms resistance) to Chassis Ground.

I would suggest trying Any/All of those approaches and reporting back with actual meter readings, thoughts, questions, etc.
George

[shyne]

Originally Posted by gbalthrop

I entered your VIN in ISTA, and the diagrams for IHKA I attached to prior post are SAME as for your 1/2007 build 335i E92.

When you say: "I confirmed there is voltage at the connector" (X4706), I presume you mean specifically: Battery voltage, 12.x V, at X4706/4, the Red wire at Socket #4 of Connector X4706? As I interpret the SSP wiring diagram, there is ALWAYS Battery Voltage at that Socket. The Motor is ONLY activated via the Flap Motor Electronics when a signal is supplied via the LIN Bus (Green wire at Socket #2).

So IF you have BOTH 12V+ at the Red wire (X4706/4), and Ground at the Blue wire (X4706/1), then you need a "signal" or message via the green wire to cause the Motor to CHANGE Flap Position. Since BMW did NOT consult with me prior to this design, I'm NOT sure how to detect the "Signal" from IHKA Module to the Flap Motors via the LIN Bus. ISTA offers a few clues.

I would think that if the Green LIN BUS Wire is connected to X01198/1 at the rear of IHKA Module, there is NO short to ground in that Green Wire, AND the IHKA Module is functioning properly (which by all indications it IS given Blower Speed control), then you SHOULD be able to Measure a change at X4706/2 (Green Wire). That would be a change in ONE, Some, ALL of the following when you press the Defrost Button on right of Climate Control Panel with Ignition ON:
1) Voltage measured with Red Meter probe on Socket X4706/2 and Black meter probe on Chassis Ground;

2) Change in "Duty Cycle"/ Frequency measured at same socket by more sophisticated Meter;

3) Change in Wave form using an [...]

Hi George,

Sorry for the late response I have not had the time to work on the car due to work.

I finally got some time and was about to start diagnosing. I decided to take a real good look at the connector and came to the realization my pins do not correspond to the diagrams. Here are the connectors colors as follows:

1/ Yellow
2/ Brown
3/ Red
4/ Yellow-Black
5/ OffWhite?
7/ Green
9/ Brown-Black

I am completely stumped.
The other black connector seems to match up fine.

[bmwbob89]

I seem to remember reading a post about wires pinched in the center console area. Control for the rear vent assemble. Worth trying to find the post.

Found it:
https://www.e90post.com/forums/showt...r+console+area

[shyne]

Originally Posted by bmwbob89

I seem to remember reading a post about wires pinched in the center console area. Control for the rear vent assemble. Worth trying to find the post.

Found it:
https://www.e90post.com/forums/showt...r+console+area

I don’t think that’s it. I believe pins 1 and 7 have been swapped around for some reason.
All wiring diagrams show that pin 1 should be a lin bus wire. Although the rest of the colors don’t match up exactly the same to the diagrams, I can make an educated assumptions that they all are in the right place.
For example,
1/ Yellow
2/ Brown (Ground)
3/ Red (12v)
4/ Yellow-Black (Evap temp sensor)
5/ Yellow (Footwell temp sensor sensor)
7/ Green
9/ Brown-Black (Ground for temp sensors)

7 Should be vent temp sensor and 1 should be lin bus wire.

Why is this a thing?! Nonetheless I am about to spend some money on a depinning kit and test this theory of mine soon. The heat is coming up fast and I do not want to have no ac

[gbalthrop]

Originally Posted by shyne

... I decided to take a real good look at the connector and came to the realization my pins do not correspond to the diagrams. Here are the connectors colors as follows:
1/ Yellow
2/ Brown
3/ Red
4/ Yellow-Black
5/ OffWhite?
7/ Green
9/ Brown-Black
I am completely stumped.
The other black connector seems to match up fine.

I can't tell what Connector you are referencing. Also NOT sure what "other black connector seems to match up". What I was suggesting in Post #4 was to test voltage or duty cycle at X4706/2, Green Wire, at the Defroster Flap Motor Connector, Pin #2.

If there is NO change in that reading when Defrost Flap button is pressed on Right side of Climate Control Panel, THEN you would pull the Climate Control Module, disconnect X01198 at the Rear of the Module, making sure it was previously CONNECTED SECURELY (common fault is NOT latching that Connector correctly, resulting in NO/ Intermittent connection in at least some of the wires).

Then inspect Pins & sockets for any damage, corrosion, etc, and test continuity in wiring between X01198 & X4706, Pins 1, 2 & 3. I would also test for short to ground in the Green wire running from X4706/3.

Attached to NEXT Post is an ISTA ScreenPrint for the X01198 Connector, with Connector View identifying the pin numbering. That ScreenPrint shows the following wire colors and functions for the Connector Sockets numbered as follows:

1) Green, LIN Bus wire
2) Blue, Ground Signal for all 8 flap motors
3) Red, Supply Signal for all 8 flap motors
4) Yellow/Black, Supply to Evaporator Temp Sensor
5) White, Supply to Footwell Temp Sensor
7) Green, Supply to Ventilation Temp Sensor
9) Brown, Ground for 3 Temp Sensors

ALL 7 wires are SAME cross-section area: 0.35 mm-squared. I would carefully examine connector for TINY numbers outboard of the sockets, identifying each of the 12 sockets, and also verify that it has a latch similar to that shown in the Connector View.

Also attached to NEXT Post is Pinout or PIB showing function of each pin in the X01198 IHKA Module Connector. NOTE: X01198 PIB shows use of Sockets 1,2,3, 6,7,8,9; THAT DIFFERS from SSP as to connector Socket Numbers.

Please let us know what you find,
George

[gbalthrop]

Attached are ISTA ScreenPrints of Heating & Air Conditioning Functions SSP, showing IHKA X01198 wires to X4706
at the Defrost Flap Motor, and also Pinout/PIB which differs in the Connector Sockets used at X01198.
George

[shyne]

Originally Posted by gbalthrop

I can't tell what Connector you are referencing. Also NOT sure what "other black connector seems to match up". What I was suggesting in Post #4 was to test voltage or duty cycle at X4706/2, Green Wire, at the Defroster Flap Motor Connector, Pin #2.

If there is NO change in that reading when Defrost Flap button is pressed on Right side of Climate Control Panel, THEN you would pull the Climate Control Module, disconnect X01198 at the Rear of the Module, making sure it was previously CONNECTED SECURELY (common fault is NOT latching that Connector correctly, resulting in NO/ Intermittent connection in at least some of the wires).

Then inspect Pins & sockets for any damage, corrosion, etc, and test continuity in wiring between X01198 & X4706, Pins 1, 2 & 3. I would also test for short to ground in the Green wire running from X4706/3.

Attached to NEXT Post is an ISTA ScreenPrint for the X01198 Connector, with Connector View identifying the pin numbering. That ScreenPrint shows the following wire colors and functions for the Connector Sockets numbered as follows:

1) Green, LIN Bus wire
2) Blue, Ground Signal for all 8 flap motors
3) Red, Supply Signal for all 8 flap motors
4) Yellow/Black, Supply to Evaporator Temp Sensor
5) White, Supply to Footwell Temp Sensor
7) Green, Supply to Ventilation Temp Sensor
9) Brown, Ground for 3 Temp Sensors

ALL 7 wires are SAME cross-section area: 0.35 mm-squared. I would carefully examine connector for TINY numbers outboard of the sockets, identifying each of the 12 sockets, and also verify that it has a latch similar to that shown in the Connector View.

Also attached to NEXT Post is Pinout or PIB showing function of each pin in the X01198 IHKA Module Connector. NOTE: X01198 PIB shows use of Sockets 1,2,3, 6,7,8,9; THAT DIFFERS from SSP as to connector Socket Numbers.

Please let us know what you find,
George

Hey George

Got the multimeter out this morning. Took my glovebox out, again.

X01198/1 is yellow on my harness for some reason, but there is continuity to X4706/2 so all should be fine.

What I did end up finding was a short to ground at X4706/3 when connector X4704 is plugged in. I tested with X4704 connected and unplugged and only got a short when it was plugged in. So I can make a guess that the issue is not with the wire between 4706 and 4704.

Took a little break but I think there may be a short further down the circuit.
I will test my theory further by repeating the same testing for the remaining connectors until I find the short. 8 connectors should be plenty fun

I will report back with updates soon. Let me know if you think of anything.

Update: Will check for short to ground on 4704/3 before doing all that work to see if that tells me anything

[shyne]

Update,

I think I found the issue. I moved onto the next stepper motor (M38 X4708).

When testing for a short on X4708/2 it only appears when X4704 is plugged in. When unplugged there is no short.

Is the conclusion that my fresh air/circulating air flap motor is causing the short? May try to pick one up on ebay shortly and see if that fixes my issues. If I’m not mistaken I’ll have to get it readdressed to my car.

[shyne]

Good news and bad news!

Good news is I found it. Bad news is the "fresh air / recirculating air flap motor" or "M111" is fried.

That'll do it I'm sure. Found one on eBay tested for $13.

It looks rather concerning I'd say though. I wonder what caused it to do that. I hope it doesn't cook itself immediately after plugging a new motor in.

[gbalthrop]

Originally Posted by shyne

... Good news is I found it. Bad news is the "fresh air / recirculating air flap motor" or "M111" is fried... I wonder what caused it to do that. I hope it doesn't cook itself immediately after plugging a new motor in.

The Photo appears to show heat discoloration at pins 1/2 (or is it 3/4?). If that is correct, the Flap Motor probably still works, but the PCB (Printed Circuit Board) is "Toast"(ed).

I would check the flap that the motor moves, to see that it is NOT seized, as that might damage replacement Flap Motor. With X4704 disconnected, will the Defroster Flap respond to switch change (with X4706 and X01198 connected)?

I don't know if the sockets 2 & 3 of X4704 need to be bridged to allow flap motors "Downstream of X4704 to be activated, but I assume they do. Otherwise, the LIN-Bus is "Open-circuit" beyond the disconnected connector. If Defrost Flap Motor works, but others do NOT with X4704 DIS-connected, I would simply bridge X4704/2 & 3 to give continuity to the LIN-Bus, and see if Mixed Air Flaps work to give Heat/Cool capability.

BAD NEWS: As for replacement Flap Motor, Both Bentley (pdf p.869, 640-16) and RealOEM.com (ad heaven/hell ;-) indicate that 7 of 8 Flap Motors are identical. UNFORTUNATELY, the ONE of EIGHT that differs is the "Fresh Air/ Recirculating Air Flap Motor -- the one YOU NEED. Here is Parts Catalog (AD) page:
https://www.realoem.com/bmw/enUS/sho...diagId=64_1454

At a glance, it appears the Recirc Flap Motor part# is: 64119339246
https://www.getbmwparts.com/oem-part...or-64119339246
Check your removed Flap Motor for 11-digit BMW part# and check the parts listing wherever you order to make SURE correct part. This appears to be situation where Amazon has correct #, and RealOEM does NOT.

getbmwpart.com (Silver Spring, MD) has best price, but charges for shipping. Hope whoever you bought part from knew the difference, but I'd be surprised if he DID.

Please let us know if the system tests OK with X4704 disconnected, and if you need to bridge Pins 2 & 3 of that disconnected Connector to get Flap motors Downstream to work.

Either INPA or ISTA should be able to "Readdress Flap Motor" for NEW motor. Since it is the "One of Eight" that is different, I'm NOT sure WHY/IF it has to be "Readressed". My concept is that the other 7 being the same, they have to be TOLD what their position is, if NEW or changed position, so they know what signals in the LIN-BUS to follow.
George

[gbalthrop]

Attached is ISTA ScreenPrint of LIN-BUS circuit & X4704 Connector View for 2007 335i E92, so you know what sockets
to bridge. BTW, if you could measure the Voltage or Duty Cycle in the LIN-Bus wire during change signal for the Defrost Motor,
it would be appreciated.
George

[shyne]

Originally Posted by gbalthrop

The Photo appears to show heat discoloration at pins 1/2 (or is it 3/4?). If that is correct, the Flap Motor probably still works, but the PCB (Printed Circuit Board) is "Toast"(ed).

I would check the flap that the motor moves, to see that it is NOT seized, as that might damage replacement Flap Motor. With X4704 disconnected, will the Defroster Flap respond to switch change (with X4706 and X01198 connected)?

I don't know if the sockets 2 & 3 of X4704 need to be bridged to allow flap motors "Downstream of X4704 to be activated, but I assume they do. Otherwise, the LIN-Bus is "Open-circuit" beyond the disconnected connector. If Defrost Flap Motor works, but others do NOT with X4704 DIS-connected, I would simply bridge X4704/2 & 3 to give continuity to the LIN-Bus, and see if Mixed Air Flaps work to give Heat/Cool capability.

BAD NEWS: As for replacement Flap Motor, Both Bentley (pdf p.869, 640-16) and RealOEM.com (ad heaven/hell ;-) indicate that 7 of 8 Flap Motors are identical. UNFORTUNATELY, the ONE of EIGHT that differs is the "Fresh Air/ Recirculating Air Flap Motor -- the one YOU NEED. Here is Parts Catalog (AD) page:
https://www.realoem.com/bmw/enUS/sho...diagId=64_1454

At a glance, it appears the Recirc Flap Motor part# is: 64119339246
https://www.getbmwparts.com/oem-part...or-64119339246
Check your removed Flap Motor for 11-digit BMW part# and check the parts listing wherever you order to make SURE correct part. This appears to be situation where Amazon has correct #, and RealOEM does NOT.

getbmwpart.com (Silver Spring, MD) has best price, but charges for shipping. Hope whoever you bought part from knew the difference, but I'd be surprised if he DID.

Please let us know if the system tests OK with X4704 disconnected, and if you need to bridge Pins 2 & 3 of that disconnected Connector to get Flap motors Downstream to work.

Either INPA or ISTA should be able to "Readdress Flap Motor" for NEW motor. Since it is the "One of Eight" that is different, I'm NOT sure WHY/IF it has to be "Readressed". My concept is that the other 7 being the same, they have to be TOLD what their position is, if NEW or changed position, so they know what signals in the LIN-BUS to follow.
George

Hey George

Although I was not able to get more results from testing.. I did replace the motor with an identical replacement. The vent flaps all work now!!
I was too eager to see if it would work. Bridging pins 2 & 3 should work in theory.

I put the valeo part number and got the same motor shipped to me in 3 days from ebay for $12!

It appears it has calibrated itself now. There was a lot of motor movement as soon as I plugged in the new motor.

Thank you for your time and patience George it is greatly appreciated! I salute you for helping a lot of users on here and providing wiring diagrams after TIS went down. I will be moving onto my next issues and what do you know, you have already helped multiple users with those issues
This may not be the last time you see me documenting my fixes.

So in conclusion for anybody else reading this in the future:
-Climate Control Module seemed to be working, dials and buttons all worked but there was no communication or response to any input.
-I found the issue by looking for a short to ground in the LIN BUS wire on connector X4706/1
-Since the motors are wired in series I went from left to right on the wiring diagrams testing pins 2/3 at the corresponding connectors until the short was made apparent. For example, short was only there when the connector at the recirculation flap was disconnected which led me to the conclusion that the motor was the cause of issues.
-I opened the motor up to find that pin 1 and 2 were melted/burned.
-No readdress was necessary. I believe that getting the exact same part number you took is crucial to this step.

Goodluck to anyone taking this on.