Check bank 1-4 light on 95' OBD 1

Your crank sensors *do* go bad sometimes...but...it's more common that one of the wires/pins to them has come undone.


If you need the part: http://www.importecparts.com/volvolist.html has our crank sensors (Ferrari 348 part #130975) for $119 (volvo part# 1367645).

This site lists that Volvo part (1367645-7) and the Bosch part (0 261 210 029 ) as the same thing: http://www.ecplaza.net/search/1s1nf20sell/bosch.html

 

Hi Michael, You will get 1121 if the car is not running, this is normal. if you push the diagnose button again, what do you get?, there maybe more stored codes.

mark

 

Michael, Also, until you are sure you have all memorized codes, do not hold the buttons for more than 8 seconds, as this will clear the ecus. If you do clear the ecus, next time you start the car, let it idle for 20 minutes so they can learn engine parameters.

mark

 

Can someone post this procedure online please?

 

Here is the procedure & codes from the WSM, Motronic 2.7 only, there are 2 ecus & button, one under each rear quarter:
mark
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This procedure should work for all Ferraris with the Bosch Motronic v2.7 systems -- that is, all 512trs, the F512m, all 348s produced after a certain point in 1990, and 1995 355s.

The information below was posted many moons ago by our good friend and advisor Ernie on a competitor Ferrari web site... Attached please find a chart showing what the codes mean.

You may also review the useful information contained here.
http://www.the348.com/Tech/348.html#ECUcodes



When the "check engine" light comes on it means that some error has gone on with the opperation of the engine that the Engine Control Unit (ECU) has recognised. The ECU will then store the code/s in it's memory. Here are the steps for pulling the error codes from the 348 ecu's.

1) Remove the covers behind the seats so that you have access to the ecu's.

2) Place the key in the ignition and turn it to the (on) position, but do not start the car. You will see the lights on the instrument panel illuminated.

3) Push and hold down the button, located next to the ecu, for 5 seconds, then release it. When you are holding down the button, you now should see the check engine light illuminate for the ecu you are on. (check engine 1/4 or 5/8)

4) When you let go of the button you will see a pause then a long flash for 2 and 1/2 seconds, pause with no flash for 2 and 1/2 seconds, then begin the flashes of the engine codes. The long flash indicates the begining and end of the code. Then it repeats the same code, until you move on to the next code.

5) Each number of the code is flashed for 1/2 second followed buy a pause then the next number in the codes is flashed. For example you will get the long flash indicating that the code will start, a pause, three flashes, pause, two flashes, pause, one flash, pause, four flashes, pause, a long flash indicating the code is finished. If this were the series of short flashes you got, the code would be 3214.

6) After you pull a code you will notice that it just keeps repeating. To get to the next code what you want to do is wait until the long flash comes on after the code. When the long flash comes on you want to hold down the button for the whole flash and let go of it in the middle of the pause. You should then see the check engine light give you another long flash to indicate the begining of the next code.

7) When the last codes has been pulled, you will get nothing but long flashes telling you that there are no more stored codes.

8) Now that all the codes have been pulled you will want to clear the ecu of the stored codes. When the ecu's is giving nothing but long flashes, you need to push and hold down the button for 10 seconds to clear out the old codes.

9) If needed, repeat the process for the other ecu.
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I would imagine it's for the A/C compressor.

 

The output wire of the climate control system that leads to the compressor also leads to the ECUs, to let them know the compressor is active, so they can modify idle to compensate for the extra drag on the engine.

Check your engine connectors, under the ecus on the frame, make sure they are fully seated & locked, if they are, check the voltages.

Access wires going to pins #40 & 40 of each ecu to engine connectors, and check voltages. attached are diagrams from the Motronic 2.7 Diagnostic sheets, step #21 &#22

20008 left ecu
20009 right ecu
41052 left connector
41051 right connector

positive lead of meter goes to wire 40 & 41, neg lead goes to ground (pin #19 in attached dignostic sheet)
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