The low voltage current that should go to the resistor/output stage unit/regulator when operating the control is missing. The switch should be sending 12-volts to terminal #86 when in RUN and START. The next day it might start and today it won't crank at all. However the car had electrical power. Older BMWs have it in the trunk near the battery, so check both these locations. thanks.
Cranking – This refers to the starter motor actuating and turning … and “turning over” the engine (the engine is rotating). A timer will also show on your cluster. The lock button in the car didn’t work, wipers wouldn’t work. If the testing indicates that you have circuitry/wiring problems that must be traced, and you need more detail that what is offered in your Bentley repair manual, we can order the applicable BMW ETM (Electrical Troubleshooting Manual) for your BMW. We may have a faulty sensor or the pin may be missing from the flywheel. Before replacing an ECU, we must diagnose all other possibilities. For these applications, it’s best to refer to the applicable Bentley repair manual for mounting position and test parameters. Test for 12-volts at the origination point for the ECU main input power. 8a: Main input power to ECU – Using the Bentley repair manual or the applicable wiring diagrams, determine what pin(s) is the main power input for the ECU (the “turn-on” wire).
The engineers at BMW saw the potential issue with this and created a solution—sort of. Just be carefull not to rev the engine too high. My 2002 BMW 530I has been doing really wierd things, steering column, goes up and down, in and out, my interior lights, randomly flash, steering wheel buttons, for radio , work randomly, the cruise control, and horn not working , side mirrors do not tilt down when in reverse, the visor lights etc work randomly!
Is a tune up in order? Please help . A common problem for 6-7 year plus BMW is the ground link between engine and frame. The headlights and taillights stay on for a while even after turning light switch off and car off. Use the Bentley repair manual to locate the fuel pump relay. Interior lights work as do blinkers. . One set is yellow on green and black on green and the other I believe is red on blue and brown on blue. NO, 12-volts – You likely have a short or open circuit between terminal 30 in the relay socket and the battery power connection at the origination of the input wire . We tried to jump start the car, but still had no power. Apply 12-volts directly to the pump to verify that it does not run. . We will now test some of the critical ECU input signals. and V8 engines use combinations of crankshaft and camshaft position sensors. The fuses? – E63, E64 (6 Series) to March 2007. If the sensors test as OK, we will have to perform more in-depth diagnostics, and these tests will be outlined in the Bentley repair manuals.
It generally fires when airbags deploy. Do not turn on dash lights. The Bentley repair manual covers this. Any ideas?? Relays cannot be visibly inspected. At this point, you need to get the basic diagnostic info.
This will require wiring diagrams for the specific year and model of your BMW. This guide shows you how to test an alternator in your car using a digital multimeter. I have a 2010 BMW X3.
The crankshaft and/or camshaft position sensor design and mounting varies through the years and models of BMW production. YES, 12-volts – Fuel pump relay is likely faulty.
Different Nameplates, Different Expectations, Engine Build: Evo Wagon – Turbocharged Evo 9 Engine, Cartridge (Gen 1) Wheel Bearing Installation, Limited-Slip Differentials And Diagnostics, Delphi Expands North American Product Line, Schrader TPMS Academy Introduces ‘TPMS Tech Talk’, 500-Plus New 3-D Product Images In Spectra Premium Catalog, Bosch, Hunter Engineering Collaborate On ADAS Calibration, Tech Tip: BMW ELV Won't Release - No Start, No Crank, 300,000+ VW 2.0L TDI Diesels Need A Good Home And Shop, Check the PCV Valve If You Suspect Oil Fouling. We will now test the solenoid, the starter motor and the battery power to the motor. Cause #1: Relieve the torque from the steering wheel and repeat the starting operation. The condition may be intermittent. BMW 335i 2008, I have a BMW 2007 525i is set here for long time cuz we lost the key I charge the battery bought a new key coded key and the key will not turn in the ignition assemble comes up with a key and a line through it sometimes a steering lock symbol comes up what's the problem, I drove my 2008 750li parked it went out the next day to start would not start crank nothing no lights i tried to jump it still nothing can someone help me. Do not swap the wires between ignition coils. NO, 12-volts – You likely have a short or open circuit between terminal 30 in the relay socket and the battery power connection at the origination of the input wire . Cause #2: In the case of a customer complaint, before connecting to the BMW Diagnosis System, duplicate the “no-crank” complaint. Stereo, dash lights, windows, etc.
A critical input, for the ECU to generate the spark and injector output, is the crankshaft position sensor and/or camshaft position sensor signal. These will need to be addressed. We will give the general differences and diagnosing: Early Motronic – 6 cylinder, single and double cam, Motronic models (Distributor cap mounted directly to the front of the cylinder head) up through the mid to late ‘80s, such as; 325e/es & 528e thru 11/86, 533i, 535i thru ‘88, 633csi, 635csi & L6 thru 5/87, 733i, 735i & L7 thru 87, and also the M3, M5 and M6 thru 93. 101 N Haven St Suite 301 Therefore, if the valve were fully closed, or closed too much, this could cause a no-start. Further wire/circuit testing will be required. 2004 330ci 149,000 miles, auto transmission. I plugged it back. To deactivate this feature try the following: A BMW may refuse to start in warm weather especially in areas that get very hot on summer days.
Then I had another idea: What if the key fob is dead, and the car doesn’t know the remote is in the car? will this require reprogramming. 8b) Using the wiring diagrams, determine where the ECU main input power is originating. Many thanks. Does the engine start now? .
Car has sat for a few weeks so thought might be battery but have driven it for a while and it behaves fine. Anybody know what's up?
What should I do now? 6: With no voltage at the solenoid “turn-on” wire, we must diagnose from the ignition switch START terminal, through the wiring, to its ultimate end at the solenoid connection. Have 2008 x3 BMW. There is likely a wiring problem or the ECU may be faulty. NO, 12-volts – You may have a faulty ignition switch, start relay (automatic transmission only), neutral safety switch (automatic transmission only) or a wiring problem in the circuitry between the switch and the coil input wire. The car will not start at random times. Am I dealing with a control problem or is another unit in between? Is A Tow Truck Really Required? The next day I came out remote didn’t work, so unlock the doors start it windows didn’t work on either side and in the back.
Next, check connections at the battery and ground points.
What year is your 525i? how do u work it? A technician once told my wife that he has to buy a ralay under where the key switch is connect to stable the current going to the starter so that it will start good but I’m here now and yes it will start most times but still will have the problems that I listed and I feel like removing that relay so please if u can help me with this request, I have a 2006 bmw 530xi just replaced starter and new battery was starting up fine forgot to register new battery now ignition don't come on and no crank no start took battery back got another new battery checked all fuses still ignition don't come on fully and no crank no start. One dealer said it was a fuel pump and replaced it. I have a 1989 BMW 325i convertible that is giving me problems starting at times. Wear safety glasses and wrap fuel hose connection with a large rag, to catch the pressurized fuel. Or ….. one, or more, of the critical input signals is faulty and the ECU is not able to generate the spark and fuel outputs. I can’t do anything w out it running. If the sensor tests OK in the resistance test, check the full length of the sensor’s wiring, up to the plug. So I charged up the battery and it worked great took it for a drive everything worked. – Check that the key holder locks the key in position, and that the steering lock unlocks (an audible “clunk” can be heard when the key is inserted). And the only clue we had was the window that moved ever so slightly. 13: Verify that the fuel pump fuse is not blown (the Bentley repair manual will detail the fuse locations).