Monthly Archives: January 2016

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

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

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

e60L7led

    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
  1. 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:

  1. Water damage especially on convertibles 6 series, almost always we see this problem: E64LEAKIt 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.
  2.  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

photo 2(1)photo 1photo 1photo 2photo 3

IF YOU DECIDED YOU NEED HELP WITH REPAIR, PLEASE SEND YOUR AMPLIFIER OR ASK UNIT OR BOTH HERE ALONG WITH 260$ PAYPAL PAYED TO LOGIC7REPAIR@GMAIL.COM.

We have also EBAY add, so you can see real feedback.CLICK THIS LINK BELOW, MAKE A 260$ 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$).

THIS AMP IS QUITE COMPLEX INSIDE AND YOU CAN SEE NOT MANY OFFER THIS REPAIR, SOME OFFER IT AT 500$++ FOR A REASON,

415**323**3412

 LOGIC7 AMPS

8000 Research Forest Dr.

Ste 115-316

Spring, TX, 77382




ALL BMW M54, M52, M60, M62, M62tu, M56, N62, N62B48tu and others!! Engine Overheating? No its not a head gasket problem!

Ok, i decided to create this post because i see lots of bimmers running hot or even overheating. You would say nothing new here, right? Well believe it or not lots of mechanics or shops trying to resolve this problem with no luck and in the end as a final solution they offer head gasket repair, which won’t fix anything.

So here are the main standard problems, applies to any water cooled engine:

  1. Radiator cap not sealing well or valve inside is not working anymore causing boiling in your cooling system due to pressure loss. Solution? replace radiator cap every 5 years even if its good.
  2. Any coolant leak will create pressure loss and introduce air in the system. Make sure there is no leaks. Use Pressure tester.
  3. Thermostat if bad, it stays open on these engines, and you usually get error code P0128 if heater inside burned or you get thermostat jammed error code. usually tstat lasts 70-100k easily.
  4. Water pump impeller can slip or even fall apart or bearing might seize causing total failure. Good thing these engines head gaskets are very strong and can sustain serious overheating.
  5. REPLACE TEMP SENSORS EVERY 70KMLS, THEY DO GO BAD AND SOMETIMES SHOW LOWER TEMPS THEN IT IS, ESPECIALLY WATER PUMP TEMP SENSOR, LOWER SENSOR IS KNOWN FOR  O-RING LEAK, APPLIES TO ANY BIMMER.
  6.  Main engine fan (electric) is bad or fan clutch not working anymore, though even with a bad fan clutch and fully working cooling system you will not get overheating, unless you are in Dubai traffic:) AC fan is very effective even with a bad fan clutch. Since 2004 BMW uses only electric fan for both AC and engine, so if it goes bad, you  will get overheating.

So, i was not going to create simple overheating article you can find anywhere, right? Its gotta be unique on this site! Here we go:

So what to do if there is no leaks and all hoses are new, gaskets etc, pressure tester confirmed no pressure loss, but engine still runs hot overheating transmission as well??? Did you know running hot will destroy all rubber gaskets and other rubber parts? Why? Because engine temps are not consistent like it  was designed! Ok, here is something nobody cares about when trying to fix overheating issues:

NORMAL TEMPS FOR 6cyl=94-98 max

NORMAL TEMPS FOR 8cyl=103-108 max

TO CHECK RUNNING TEMPS YOU NEED TO OPEN HIDDEN MENU:

1) hold reset odometer button until you see the menu

2) go to 19 unlock menu (press button once) and enter (hold the button to enter) the sum of your last 5 vin numbers:

ex: last vin 23657, so sum=2+3+6+5+7=23

3) now go back to menu 7 and hold the button until you see running temps, if you don’t, it means you enter unlock code wrong:

here is a picture of running temps with RECALIBRATED 87C thermostat, these are actually really good temperatures for this and other V8 engines! It will keep your cooling system healthy and will prolong the life of all rubber gasket seals including valve seals. Moreover it will reduce detonation so you’ll get extra power in the city driving! Imagine lowering cooling pressure from 200 to 120??? 200 is what your tire pressure is. It is a big deal, all rubber gaskets run under serious stress and we see tons of exploded hoses, coolant tanks and other expensive leaks like:

wheep hole 2000$ if you install oem pipe

rear cover plate (Tranny needs to be removed)

valley pan (intake removal needed)

Soon we will offer these cooler temp tstats.

img_4394

 

 

 

HEATER CONTROL VALVE! THIS VALVE DOES NOT LAST! RUBBER SEALS INSIDE BECOME BRITTLE, CLOGGING UP THE COOLANT CHANNELS GOING TO THE HEATER CORE! RESULT IS OBVIOUS=YOU CANNOT BLEED THE AIR OUT OF HEATER CORE=OVERHEATING! THIS ENGINE HAS SELF BLEEDING COOLANT SYSTEM, BUT IT WILL NOT WORK IF THIS VALVE IS CLOGGED.

HERE IS DISASSEMBLED HEATER VALVE FROM 2006 750LI with 98kmls. As you can see rubber seals are cracked and not flexible anymore, BUT if you have working auxillary water pump, you still get okay heat cabin, but system has air pocket, since you need very good flow when bleeding coolant system.

photo 1

HERE IS THE MAIN PROBLEM: YOU SHOULD SEE A NICE RUBBER SEAL AROUND THE VALVE, BUT ITS ALL BROKEN AND THE WORST PART IT CLOGGED RIGHT CHANNEL COMPLETELY:

photo 2 photo 3

img_4339SO GOOD RECOMMENDATION IS TO REPLACE IT EVERY 5-7 YEARS AND START EVERY COOLANT SYSTEM PROBLEM FROM THIS VALVE REPLACEMENT. IF THIS VALVE IS GOOD YOU CAN DRIVE YOUR CAR  EVEN WITH LEAKING COOLANT (I KNOW ITS NOT A GOOD IDEA), BUT YOU WILL NOT GET OVERHEATING ISSUES IF YOU KEEP ADDING COOLANT, BECAUSE ENGINE WILL BLEED ITSELF ALL THE TIME IF HEATER CORE HAS NO AIR POCKETS.  REMEMBER COOLANT SYSTEM IS THE MOST IMPORTANT SYSTEM IN YOUR CAR!

SO UNTIL YOU SEE OIL IN THE COOLING SYSTEM, OR COOLANT IN THE OIL OR EXHAUST SMELL FROM COOLANT TANK, DO NOT BELIEVE IN THE HEAD GASKET FAILURE. WHEN HEAD GASKET IS BAD, YOU  WILL KNOW IT FOR SURE:) V8, IS VERY STRONG ENGINE AND ITS NOT EASY TO DESTROY HEAD GASKET BY JUST OVERHEATING, DOESN’T APPLY TO STRAIGHT 6 THOUGH….