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BMW E90, E92, E60, E63, E64, E61 LOGIC7 AMPLIFIER DIAGNOSTICS&REPAIR

$550 Any BMW Amplifier, Option 677, 688, 752 fiber optic 2002-2019 except B&O amplifier.

This post is about another type Logic7 BMW amplifier. This top HI-FI DSP Logic 7 Part 65129181743 was found on the following vehicles:

1′ E81 (02/2006 — 12/2011)
1′ E87 (02/2003 — 02/2007)
1′ E87 LCI (01/2006 — 06/2011)
1′ E88 (11/2006 — 10/2013)
1′ E82 (11/2006 — 10/2013)
3′ E90 (02/2004 — 09/2008)
3′ E90 LCI (07/2007 — 02/2012)
3′ E91 (02/2004 — 08/2008)
3′ E91 LCI (07/2007 — 05/2012)
3′ E92 (05/2005 — 02/2010)
3′ E92 LCI (11/2008 — 06/2013)
3′ E93 (09/2005 — 02/2010)
3′ E93 LCI (11/2008 — 10/2013)
5′ E60 (12/2001 — 12/2009)
5′ E60 LCI (10/2005 — 09/2010)
5′ E61 (10/2002 — 02/2007)
5′ E61 LCI (11/2005 — 05/2010)
6′ E63 (05/2002 — 07/2010)
6′ E63 LCI (04/2006 — 07/2010)
6′ E64 (09/2002 — 07/2010)
6′ E64 LCI (04/2006 — 07/2010)

65129166897

(03/01/2008 — 10/03/2008), Exchangeable retrospectively

65129170386

(09/01/2007 — 04/09/2008), Bilaterally exchangeable

65129166334

(09/01/2007 — 06/15/2007), Bilaterally exchangeable

65129150899

(03/01/2007 — 11/19/2007), Bilaterally exchangeable

65129141001

(03/01/2007 — 11/23/2006), Exchangeable retrospectively

65129121635

(03/01/2006 — 08/11/2007), Exchangeable retrospectively

65126982299

(09/01/2005 — 03/12/2007), Exchangeable retrospectively

65126973621

(02/11/2005 — 10/15/2010), Bilaterally exchangeable

65126972156

(02/07/2005 — 02/03/2005), Bilaterally exchangeable

65126960923

(11/29/2004 — 07/13/2005), Exchangeable retrospectively

65126958656

(07/29/2004 — 05/17/2011), Bilaterally exchangeable

65126951669

(05/27/2004 — 09/09/2005), Bilaterally exchangeable

65126945781

(03/01/2004 — 10/28/2004), Bilaterally exchangeable

65126943491

(11/17/2003 — 03/23/2004), Bilaterally exchangeable

65126939783

(10/01/2003 — 03/15/2004), Bilaterally exchangeable

65126938639

(06/30/2003 — 10/18/2006), Bilaterally exchangeable

65126936640

(06/02/2003 — 05/20/2011), Exchangeable retrospectively

65126935923

(04/01/2003 — 10/20/2006), Exchangeable retrospectively

65126935697

(02/24/2003 — 06/23/2003), Exchangeable retrospectively

65126933392

(01/23/2003 — 03/13/2003)

This amplifier is different than E65 Logic7 amplifier, it runs different software and cannot be installed on either. This amplifier has 9 channels vs E65 with only 5 channels. This amplifier controls all the speakers on the car, so if it goes bad you will not hear any sound in any speaker.
But not always amplifier is the problem, in some cases other modules go bad, interrupting MOST network and you will not hear any sound even with working amplifier. So here i will explain how to diagnose if it is the amplifier or something else went wrong.

This amplifier has a diagnostic LED, which will show lots of things you most likely don’t know about. Here you can see where it is located. So look at that LED, turn on the radio and look at it:

basically:
blinking yellow -check or bypass sat tuner or Bluetooth tel module
no yellow– amp is bad
steady yellow but no sound or bad sound- amp is bad

1. Steady yellow means its getting input fiber optic signal from the head unit (CCC or CIC) and output signal travels to the head unit correctly through other units , so you should hear the sound in most cases, but rarely it also could be some software glitch with CCC, when you don’t get sound with working amp. Try CCC reset.
2. Blinking yellow means AMPLIFIER IS WORKING and getting input signal from the head unit, but output signal is somewhere lost due to the next bad unit in the loop. So you just need to find a bad unit and either bypass it or replace it with a working one. Most common units to fail are: Sirius satellite unit, Bluetooth telephone unit

No Yellow LED, but you can see blinknig red LED deep inside most likely means 3 things:
1. amp is bad
2. no power getting to the amp check last 2 thick wires red and brown 12V should be present always, otherwise check fuses in the trunk.
3. No fiber optic input getting into the amp from head unit, but in this case you should see a red LED on for 15-20secs, this means amp is waiting for a signal and if no signal present it will go to sleep mode. Easy to check, you should see a blinking red LED in the CAR CONNECTOR with the amp fiber optic connector disconnected. If its blinking it means head unit is sending signal to the amp and amp CPU has to accept it and send the output signal back to other units and head unit eventually. Rarely, But if no red led present in the connector it means no signal is coming from the head unit due to either bad head unit or some fiber optic wire damage. If you remove head unit and you see a red light blinking, you should see the same blinking at the amp connector.

So basically you should get steady yellow LED at the amp, which will indicate the network is working, bypass not working modules and if amp is good you will get sound back to your car!

These amps are much better design compared to E65 design, but they still go bad due to following reasons:

Water damage especially on convertibles 6 series, almost always we see this problem: It happens when water drainage pipes get clogged up with dirt and thanks to smart design all water leaks onto the amp and other units. Please always clean those pipes with compressed air and some soap. On 3 series we see rear taillight bolts getting loose and therefore it leaks water inside.
Actual CPU failure or other things go bad inside the amp. We can help in this case, but can not guarantee 100% success, usually we see 60-70% success rate vs 90% e65. Good thing these amps are quite cheap on Ebay or junk yards, or new from the dealer 1200$.

HOW TO BYPASS NON WORKING MODULE??? EASY! GET THIS P/N FROM ANY BMW DEALER 61136917541, YOU CAN GET IT ONLINE FROM ECS TUNNING ECS TUNNING FIBRE OPTIC JUMPER. YOU HAVE TO REMOVE INNER PART WITH SOME FLAT SCREWDRIVER OR A KNIFE, YOU CAN ALSO USE ZIP TIE IF YOU PLAN TO

IF YOU DECIDED YOU NEED HELP WITH AMP REPAIR 550$ PAYPAL PAYED TO LOGIC7REPAIR@GMAIL.COM.

We have also EBAY add, so you can see real feedback.CLICK THE PAYMENT LINK ON THE TOP OF THIS PAGE, MAKE A 550$ PAYMENT, PRINT A RECEIPT AND INCLUDE IT IN THE BOX WITH YOUR AMPLIFIER OR ASK UNIT AND SEND IT TO OUR ADDRESS (SEE BELOW). USUALLY IT TAKES 1-2 DAYS TO REBUILD IT AND 2-3 DAYS SHIPPING. INEXPENSIVE AND FASTEST SHIPPING IS USPS PRIORITY MEDIUM BOX (12$).

BAVLOGIC, LLC
3600 FM 1488 RD
Ste 120 PMB-156
CONROE, TX, 77384-3817
(415)323-3412

THIS AMP IS QUITE COMPLEX INSIDE AND YOU CAN SEE NOT MANY OFFER THIS REPAIR, SOME OFFER IT AT 500$++ FOR A REASON, IN SOME CASES LIKE BAD WATER DAMAGE OR SUCH ITS NOT EVEN FIXABLE.

How to Troubleshoot MOST bus or how to find the faulty MOST unit ON ANY BMW, AUDI, PORSCHE, VW, MERCEDES BENZ and other cars with OPTICAL FIBRE OPTIC MOST network

86 Replies

In this post we will be describing how to diagnose MOST bus failure in any BMW, AUDI, PORSCHE, ROLLS ROYCE, RANGE ROVER HSE, BENTLEY with MOST fiber optic bus. every car has different configuration, but principle is still the same!

So in 2000 they introduced newer multimedia bus, called MOST, IT IS VERY NICE AND FAST NETWORK, SO THERE IS ENOUGH SPEED TO CONTROL EVERY MULTIMEDIA DEVICE AND THEY ELIMINATED LOTS OF COPPER WIRES IN THE CAR. NOW SOUND IS FULLY DIGITAL AND CLEANEST (BC NO SIGNAL LOSS ON THE WIRES), SO IT IS A GOOD THING, BUT ITS MORE COMPLEX AND NOT VERY RELIABLE.

So to start you need to understand that all MOST (multimedia) modules in the car work in the closed loop, which means if any device in the loop fails-none will be working.MOST bus primary signal (optical red light signal) is generated inside of the main computer, which is your main screen CID (control display or CID in E65 car only, other BMW have main computer incorporated into head unit or CCC/CIC/NBT etc), then it travels through all MOST network devices (ask unit, amp, navi, fm tuner, phone etc. depending on how many options you have) and comes back into main head unit. Basically all units connected in the loop- one unit fails=broken network! Once you understand this principle, you can easily find broken unit or network interruption, don’t forget dealer will charge up to 500-1000$++ for such a serious job! You don’t believe me? go and try, then you will understand how priceless with post is.

Your E65 E66 or Rolls Royce phantom ( yes don’t be surprised it is the same exact car as your 760li btw) car has MOST bus failure if:

-cannot hear any sounds or music

-cannot see tracks playing on the display

-fm stations not available

-navi isn’t functioning

For other BMW like e60/e90/e70/e89/f01 and others MOST BUS FAILURE symptoms are little different because primary head unit has 4-5 modules (SVS, ask unit, MOST GATEWAY, NAVI, Radio tuner) combined and therefore everything will work except for those secondary modules:
-amplifier no sound and you see mute icon on the radio or screen
-TCUM or telephone module
-SAT NAV receiver
Here is the MOST DEVICES order diagram , but this is only valid for basic order and only for pre 2006 cars, you might have way more devices in the network, so you have to figure it out yourself by looping eac modules and draw a diagram of the modules.
Here is a quick video showing how to find a bad unit in real time:

FOR 2006-2008 E65 E66 cars basic order will look like this:

MMIGT(screen)>>CDC>>AVT(if you have it)>>TEL>>SAT(hd RADIO)>>L7>>SVS>>NAVI>>ASK>>OOPS(GLOVE BOX MOST LOOP)>>MMIGT

FOR E60 E90 E63 E89 E90 E92 E93 and so on:

HEAD UNIT CCC/CIC/NBT>>L7AMP>>SAT>>TCU>>MULF>>HEAD UNIT

On these cars in most cases i see sat and amplifier unit failure very often, telephone module goes bad too but not that often.CCC navi units have a high rate failure, but the good thing once you replace it, you replace 5 modules at once, so its more reliable and much easier to find a faulty unit because you only have 2 or 3 modules to diagnose and all of them located in the trunk. We also offer CCC or CIC repair service
So to find out the faulty unit you either need to see a dealer (but even dealer makes mistakes), but here is an easy solution if you don’t have anything, and if you do it right it always works:

You need basically to find out where the most signal gets lost, after what device you don’t see the red light. In other words you will be checking the red light after every device in the network, and the one which is not sending the red light signal is your FAULTY MOST UNIT. OOPS is the last diagnostic connection located in the glove box and it has lollipop attached and it has to be looped there, some people think it is a spare jumper, but its not, without this jumper you will interrupt the network!

most common MOST devices failure (descending from most common to less):

-SAT SIRIUS unit always goes bad, we will offer repair of this unit soon

–TCU TELEPHONE BLUETOOTH MODULE RECENTLY WE SEE TONS OF THEM FAILING!

-Logic7 amp AMP

-ask cd unit ASK

-navigation NAVI

-fm tuner

-CD itself main screen CID

-cd changer CDC

-SVS (gets flooded with hydraulic fluid from trunk opener cylinder, if you see sticky fluid on the NAVI, SVS- replace asap)

other modules. depending what you have in your car

Always check if you have red light in the glove box, disconnect that jumper and check for the light, if you found and bypassed bad unit correctly you should see the red light in the glovebox and then you can install the jumper and everything should start working. I know it sound complicated but once you understood how it works it is kind of very easy.

BUT PLEASE DO NOT BLINDLY BYPASS EVERY MODULE, LIKE LOTS OF PEOPLE DO, YOU MIGHT FIND THE PROBLEM, BUT ITS NOT EFFICIENT AND SOMETIMES YOU CANNOT DIAGNOSE IT RIGHT. ALSO MAKE SURE EVERY MODULE HAS 12v POWER. BASICALLY EVERY MODULE NEEDS FIBER OPTIC SIGNAL AND 12V POWER ATTACHED TO FUNCTION.TO WAKE UP MOST NETWORK IT IS ENOUGH TO OPEN/CLOSE THE DOOR, YOU DON’T HAVE TO START THE CAR, THE THING IS MOST GATEWAY WILL GO TO SLEEP AFTER 10 MINUTES IF NETWORK IS BROKEN AND TO WAKE IT UP YOU NEED TO OPEN/CLOSE ANY DOOR OR TURN ON THE RADIO.

THAT’S about it, IF YOU FOUND THE BAD MODULE YOU JUST SAVED 300-400$ AND TIME. REMEMBER LOTS BMW SHOPS STILL CANNOT DIAGNOSE IT RIGHT AND ALWAYS POINT TO ASK UNIT OR AMPLIFIER, “BECAUSE THERE IS NO SOUND”, WHICH IS NOT ALWAYS TRUE, I WOULD SAY IN 50% ITS NOT CORRECT EVEN FROM OFFICIAL DEALERS. WHY THEY MADE IT SO COMPLICATED AND NOT RELIABLE?? WELL THIS A FUTURE OF CARS AND TECHNOLOGY, YOU ARE THE ONE WHO ASKED TO HAVE ALL THESE TOYS IN THE CAR, SO YOU EITHER LEARN IT OR HAVE YOUR WALLET READY TO GET SKINNIER, OR BUY HONDA/TOYOTA….

Rolls Royce Phantom and BMW E65, E66 LOGIC7 AMPLIFIER AND ASK UNIT DIAGNOSTICS

212 Replies

The article below discusses common audio issues you may experience with your LOGIC7, standard ASK system, or both. The LOGIC7 amplifier and ASK module are used in the Rolls Royce Phantom and BMW E65, E66 models.

Please also click here to check our NEW product-Remote start for E65 E66 RR Phantom, nicest feature in your car!

THE AUDIO SYSTEM

The audio system is available in two variants, standard 6 speaker Hi-Fi, and BMW LOGIC7 also referred to as ‘Hi-Fi Professional DSP’, ‘Top Hi-Fi’ or ‘Premium DSP’.

The standard Hi-Fi system has the following configuration:

ASK Module:
– 2 Front Mid Range Speakers and Tweeters
– 2 Rear Deck Mid Range Speakers
– 2 Subwoofer Pre-outs (fed directly to Hi-Fi Amplifier)

Hi-Fi Amplifier:
– 2 Underseat Subwoofers

Summary:
Conventional analogue amplifier, analogue audio is received from the ASK module and amplified for the two subwoofer channels.

Common Failure Modes:
ASK:
– Failure of one or more front or rear deck speaker outputs, usually crackling, distorted or no audio output. This is an ASK related failure.
Hi-Fi Amplifier:
– The subwoofer amplifier is very reliable and rarely suffers any failure symptoms.

The LOGIC7 system has the following configuration:

ASK Module:
– 2 Front Mid Range Speakers and Tweeters
– 2 Rear Deck Mid Range Speakers

LOGIC7 Top Hi-Fi Amplifier:
– 1 Centre Mid Range Dashboard Speaker
– 2 Rear Door Mid Range Speakers
– 2 Underseat Subwoofers

Summary:
Digital amplifier with full DSP (Digital Signal Processing) and 7 channel graphic equaliser. The audio data is received from the ASK (Audio System Controller) via a fibre optic connection, it is decoded, processed to enhance the sound and staging effects before being converted back to analogue and fed to the internal 5 channel amplifier.

Common Failure Modes:
ASK:
– Failure of one or more front or rear deck speaker outputs, usually crackling, distorted or no audio output.
LOGIC7:
– Sub-woofer output failure, resulting in crackling, distorted or no bass output.
– One or more of the three mid range speaker output channels can suffer crackling, distorted or no audio output.

2002-2005 Pre Facelifted ASK UNIT (CD-Player)

2006-2008 Face lifted ASK UNIT (CD-Player)

Standard problems with ASK AUDIO CONTROLLER:

– crackling, static noise from front doors and rear deck speakers. No sound at all. Therefore it will affect all service sounds like:

-PDC (parking sensors) not beeping, no NAVI guide voice, door chimes, warning sounds etc.

– in some cases ask unit controller is not responding to fibre optic signals causing MOST fibre optic bus failure. But it does not mean the problem is your ask unit or Logic 7 amp, it could be any device in the MOST BUS network, to troubleshoot and find out which module is causing failure I will cover in details in my next post, stay tuned.

THIS VIDEO SHOWS HOW TO REMOVE LOGIC 7 AMPLIFIER

How to remove ASK CD PLAYER UNIT?? EASY!

LOGIC 7 TOP HIFI AMPLIFIER 2002-2008

FIRST GENERATION BAD DESIGN L7 AMPLIFIER 2001-2006:\

NOT ALWAYS FIXABLE…. 50% SUCCESS RATE.

GOOD AMPLIFIER DESIGN AFTER 2006. 4 CLIPS:

VERY GOOD SUCCESS RATE ABOUT 90%

BMW Logic7 amplifier is a fiber optic controlled amplifier with FIBRE OPTIC CONTROLLER AND HIGH SPEED 24 BIT DSP PROCESSOR, therefore you can not install regular aftermarket amp. It produces 5 channels:

-sub woofers under front seats 8″ shallow type

-rear doors

-front center speaker in the dash

Any problems with those speakers are related to the AMP and have nothing to do with the speakers most of the times, but sometimes sub woofers get flooded and therefore can be bad, causing amplifier failure. Speakers can be easily tested: it should show about resistance=4 Ohms.

Main problem is that modules inside the amplifier overheat and die, the only way to rebuild i is to replace it, unfortunately BMW or Becker made it impossible due to non standard mini modules. we redesigned the entire system and since 2009 we did not have any returns.

Please do not even think that capacitors went bad, it never happened, but you can always check them if they are ok, before replacing it (makes sense?). But since 2009 and ~280 amps fixed none of them had bad caps.

Another problem with Logic7 amps is that when it does not sound right, those burnt modules overheat entire amplifier causing Logic board to fail, so if your amp isn’t doing well its better not to use it and fix it ASAP.

In most of the cases, APPLIES TO CARS BEFORE 2004 (AFTER 2004 THEY CHANGED SOFTWARE AND SETTINGS ARE ADJUSTABLE EVEN WITHOUT ANY AMPLIFIER CONNECTED!) if Logic7 level AND EQ SETTINGS ARE adjustable in the menu (entertainment),

it means that logic board is still okay and it is fixable, but if you don’t have any sound, or if its cutting in and out, it means that Logic7 amplifier is causing MOST bus failure, and lots of things are not working in your IDRIVE:

-navigation isn’t working at all.

-is not showing consumption and other things.

-cd changer making noise trying to find a CD.

HOW TO BYPASS NON WORKING MODULE??? EASY!
HOW TO DIAGNOSE MOST BUS FAILURE ON ANY CAR WITH MOST FIBRE OPTIC NETWORKGET THIS P/N FROM ANY BMW DEALER 61136917541, YOU CAN GET IT ONLINE FROM ECS TUNNING ECS TUNNING FIBRE OPTIC JUMPER. YOU HAVE TO REMOVE INNER PART WITH SOME FLAT SCREWDRIVER OR A KNIFE, YOU CAN ALSO USE ZIP TIE IF YOU PLAN TO KEEP IT

In my next Post i will cover how to diagnose MOST bus failure and what device causing it, because it could be any device in the MOST bus network, and to find it out you either need bmw software and cable or i will explain the way on how to diagnose it without anything.

IF YOU DECIDED YOU NEED HELP WITH REPAIR, PLEASE SEND YOUR AMPLIFIER OR ASK UNIT OR BOTH (550$X2) HERE ALONG WITH 550$ PAYPAL PAYED TO LOGIC7REPAIR@GMAIL.COM.

We have also EBAY add, so you can see real feedback.CLICK THIS LINK BELOW, MAKE A 550$ PAYMENT, PRINT A RECEIPT AND INCLUDE IT IN THE BOX WITH YOUR AMPLIFIER OR ASK UNIT AND SEND IT TO OUR ADDRESS (SEE BELOW). USUALLY IT TAKES 1-2 DAYS TO REBUILD IT AND 2-3 DAYS SHIPPING. INEXPENSIVE AND FASTEST SHIPPING IS USPS PRIORITY MEDIUM OR LARGE BOX (15$).

if your car facelifted 2006 and up, its 99% guaranteed its fixable.

before 2005 logic7 amplifiers are not always fixable, so if you have cutting in and out, or it plays only from front speakers and Logic7 level is not adjustable, most likely we cannot help, but you can still bypass it and install standard amp, though it will not sound like original one, though much cheaper.

IF YOU ARE STILL HAVING PROBLEMS DIAGNOSING YOUR AMP FAILURE PLEASE GIVE US A CALL OR TXT IF NO ANSWER, SO WE WILL CALL YOU BACK, BUT PLEASE READ THE ARTICLE FIRST, IT EXPLAINS A LOT IF NOT EVERYTHING.

NOTE: If you don’t have any sound and cannot see NAVI, FM stations, CD tracks changing or playing, it means you have at least one device failure in the MOST network and you have to find out which one (most common are: NAVI, SVS, CD changer, ASK, L7, FM tuner) is causing this problem, i will be describing it in my next post.