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I need schematic diagram of: Bosch MOTRONIC ME 7.3 H4 ignition system

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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SOURCE: i want to repair my bosch digital motor


Posted on Mar 02, 2011

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SOURCE: Hi I need a schematic

I have several manuals. TDi correct? Which engine? Email me with those specifics and I will send the manuals to you.

Posted on Jun 29, 2011

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After battery Replacement

All vehicles with Bosch Motronic fuel injection system, when starting the engine after the battery was discharged or disconnected, switch on the ignition for approx. 10 seconds and then switch it off again. This makes sure that the old adaptation

on May 19, 2008 | 2006 Audi A8

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Wiring diagram of 7 pin ignition module manufactured by bosch

Lindie, try the link below.
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
diagram of 7 pin bosch ignition module Google Search

Apr 24, 2016 | Cars & Trucks

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I have 1986 porsche 944 it start and shuts of what could be the problem.

I hate to say it, but, if it starts cleanly and quickly on all cylinders its likely to be a switch/sensor/ thermoswitch etc.
Does it run cleanly?
Are the fluid levels correct?
The fuel injection has a cold start system but the ECU needs information from intake manifold, water temp and incoming air flow to maintain its running.
Get on the web and go to Porche owners forums or find your nearest (Bosch?) agent to help.
Wikepedia says there are 3 engines and they use Bosch Motronic systems. See what yours has and search for diagrams/handbooks etc on the web/ebay. There's piles of stuff out there for Bosch systems.

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1996 Opel Kadett/Astra 200i no power to ignition coil

do you have coil trigger on either wire to the coil? if so then apply 12 volts to the other wire to see if car will start.

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Im looking for an on-line firing order diagram for a 1997 land rover disco with a 4.0 v-8

Telephone: Fax: VAT Registration No.:
Notes Specified value Measured value
Ignition system
Ignition coil Make Bosch
Ignition coil Type 0 221 122 392
Ignition coil supply voltage + with ballast V 11,0
Primary resistance Ohm 0,67-0,82
Firing order 1-8-4-3-6-5-7-2
Distributor (ECM) Make Lucas
Distributor (ECM) No. 42583A
Contact breaker gap/trigger air gap mm 0,20-0,35
Cylinder layout

Manufacturer: Land Rover Model: Discovery (90-98) 3,9 Engine code: Output: 134 (182) 4750 Tuned for: R-Cat Year: 1994-98
© Autodata Limited 2007 14/05/2011 V6.410-

8 7
6 5
4 3
2 1
looking from front of disco

May 14, 2011 | 1997 Land Rover Discovery

2 Answers

DTC code-P1618 = fault in lead between aw 50-52 and motronic 4.3. what does this mean and were is it on the car . its a vovlo s 40 year 2000, made 09/99 motor is 1.9 gas auto trans

aw50-52 is the transmission. motronic is the fuel system. it means the two modules are not communicating with each will need a pinout diagram for these modules and go from there.its difficult to remove computers on late volvos without the speciall tool.furthermore getting an acurate diagram other than a volvo service manuel [paper service manuels were discontinued in 2000].will be near impossible. in this case it makes sense to bring to the dealer.

Apr 18, 2010 | 2000 Volvo S40

1 Answer

Timing mark for 89 735i

Timing INSPECTION AND ADJUSTMENT Distributor Not Removed EXCEPT MOTRONIC MODELS NOTE: Ignition timing on late model vehicles is constantly being adjusted by the Digital Motor Electronics (DME) engine control system. No manual timing adjustment is necessary or possible. In order to adjust the ignition timing dynamically, the engine must be at operating temperature and running at a specified rpm (see the Tune-Up Specifications chart). A stroboscopic timing light and tachometer are needed for this operation.
  1. Disconnect and plug the vacuum line(s) at the distributor.
  2. Attach a timing light and tachometer according to the manufacturer's instructions.
  3. Raise the idle speed to that listed in the Tune-Up Specifications chart under Ignition Timing.
  4. With the idle speed adjusted to the proper rpm direct the stroboscopic timing light beam straight down through the opening in the flywheel housing flange adjacent to the starter, and align the steel ball pressed into the flywheel with the timing mark on the flywheel housing.
  5. Loosen the distributor hold-down bolt and rotate the distributor as necessary.
  6. After the adjustment has been made, tighten the hold-down bolt and recheck the timing at the specified rpm to make sure that the setting was not disturbed during tightening.
MOTRONIC MODELS Although the timing on vehicles equipped with the Motronic control unit cannot be adjusted, the timing can still be checked. On cars with the Motronic control unit, the only cure for improper timing is to replace the control unit. Also, timing must be within a certain range, as the computer changes the timing slightly to allow for various changes in operating condition. In other words, the timing does not have to be right on the mark, but anywhere in the specified range. To check the timing, proceed as follows:
  1. Look up the control unit number found on the casing of the assembly. If you vehicle is a 3, 5 and 6 series vehicles, the control unit unit is located in the glove box. If your vehicle is a 7 series, the control unit is in the right side speaker cutout. Find the unit number on the underside of the assembly and then cross reference the number to the corresponding number on the Computer Controlled Ignition Timing Chart.
  2. The engine should be at normal operating temperature. The rpm level should be within the specified range as well.
  3. Connect a tachometer and a timing light to the engine. Start the engine and check the rpm. If it is not correct see the appropriate checks under Idle Speed and Mixture Adjustment. Operate the timing light to see if the timing is within the range specified on the chart. If it is significantly outside of the specified range, the control unit must be replaced.

Apr 16, 2009 | 2000 BMW 7 Series

1 Answer


replace the overvoltage protection top with 10a fuse in it next to the motronic behind the battery

Sep 04, 2008 | 1987 Mercedes-Benz 300-Class

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