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Old 12-15-2013, 12:39 PM   #1
Andrihanen
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Exclamation bmw e46 320i check engine light problem

hi, my check engine light and low coolant light does not come on when i turn on the ignition, but when i do the instrument cluster test they both come on? does anybody know about this problem?
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Old 12-15-2013, 01:03 PM   #2
jfoj
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Look coolant light should not come on, but SES/CEL/MIL light should light when ignition it turned on just before the crank position.

Suggest you read codes and/or trigger a code and make sure the SES/CEL/MIL light actually lights are works as expected.

Many ways to spoof the SES/CEL/MIL light.

Pull the MAF connector and see if you can trigger a MAF code and the SES/CEL/MIL light if you do not see any current codes when reading the DME.
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Old 12-15-2013, 01:28 PM   #3
Andrihanen
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I have read the codes, there were 2 codes, p1622 and p0159. But i have fixed it now. And there are no codes, but the check engine light does not work, not even when the codes were there. It only works on the instrument cluster test.
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Old 12-15-2013, 01:51 PM   #4
jfoj
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The light has been spoofed.

Probably someone put a resistor, probably 250-1k Ohm and/or maybe a diode, on the line from the DME output to the dash, then put ground on the side between the resistor and the cluster. Doing this does not much Voltage difference between the circuit so the SES/CEL/MIL would not light. The light/LED sees negative on both sides so it will not light.

Then the SES/CEL/MIL light would not come on under normal circumstances, however, the cluster test is internal and would still light the SES/CEL/MIL light.
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Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temp, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose temp switch O-ring - BMW #13621743299

Last edited by jfoj; 12-15-2013 at 01:52 PM.
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Old 12-15-2013, 02:01 PM   #5
Andrihanen
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I have looked after the dme, it look normal there, no signs of anything. And on the back of the instrument cluster it also look normal.
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Old 12-15-2013, 10:32 PM   #6
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I do not know if the DME has a specific SES/CEL/MIL light output or if it is transmitted on the CAN bus to the IKE?

Probably something hacked on the instrument cluster?

Time to research and compare other like cars.
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Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temp, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose temp switch O-ring - BMW #13621743299
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Old 12-16-2013, 01:11 PM   #7
Marek555
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When is your car produced? Check engine light doesn't work before mid 1999 produced cars. And same goes for low coolant light.
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Old 12-16-2013, 01:18 PM   #8
Andrihanen
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It's produced in 1998. Are you sure about that? Then why would the car have the check engine light and the low coolant light in the instrument cluster? And why would it light up in the instrument cluster test?
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Old 12-16-2013, 03:11 PM   #9
Marek555
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Yes, I am sure, both my 328i E46s (produced 1/99 and 4/99) did the same thing and you can check some youtube E46 startup videos. Low coolant light still works, but it comes on only when coolant level is low.

Last edited by Marek555; 12-16-2013 at 03:12 PM.
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Old 01-06-2014, 09:01 PM   #10
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Quote:
Originally Posted by Marek555 View Post
When is your car produced? Check engine light doesn't work before mid 1999 produced cars. And same goes for low coolant light.
Hi,

I have recently purchased a 99 model 328i manufactured in June 98 and my CEL does not light up on startup either. I have not checked codes yet, waiting for 20 PIN under hood adapter from ebay.

In fact the only light on left cluster that lights on startup is the EML. On right side cluster all good with airbag and others lighting up. I will try dash test too to see if it lights up.

I was searching for some answers too and came across this post, although I am surprised to hear that it would not work. Does anyone know why it would be not working on startup for early models of E46?
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Old 04-10-2016, 03:37 PM   #11
ncabrita
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Hi,

any news about this subject?

i have the same problem with the same car and same 320i 1999 engine . The Check engine light stoped working no matter what codes i have.


Also i found that if i remove fuse 14, doesnt make any diference in starting the car!!

anyone could help please.

thanks
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Old 11-16-2016, 04:07 PM   #12
fredrikaksdal
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Having same issue, anyone found a solution?
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Old 11-16-2016, 06:13 PM   #13
jfoj
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After spending more timing studying up on OBDII/EOBD, the vehicles outside of North America do behave differently.

OBDII was phased in starting in 1996 in North America, but EOBD was phased in at different times in different markets. So if your car was not supposed to be EOBD compliant the SES/CEL/MIL may not light up when the key is turned on and it is also possible that the SES/CEL/MIL may not even turn on during a fault condition.

Needs to know the model year of the vehicle and where you are located to understand how the SES/CEL/MIL is supposed to function.
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Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temp, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose temp switch O-ring - BMW #13621743299
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Old 11-16-2016, 11:55 PM   #14
fredrikaksdal
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The car is a 1998 modell 318i with the M43TUB19 engine. The car i located i Norway but it was imported from Germany in 2007. I havent read out the diagnostic codes yet, as i'm waiting for the 16pin OBDII to 20pin to arrive in the mail.
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Old 11-17-2016, 06:49 AM   #15
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So I do not know the European spec cars, if the 20 pin round DLC connector under the hood has a cap with jumper pins in it, there should be a 16 pin EOBD/OBDII port under the dash that should present DME and EGS codes. For all other modules in the car you will need to connect up to the round 20 pin DLC connector.

As for a 1998 model, it was no EODB compliant. It may present codes in the EOBD/Pxxxx format, but the SES/CEL/MIL would not likely come on before cranking the engine and the light may not even come on if codes are present. In North America the light is supposed to come on if something would cause the engine to output 1.5 times more pollution than the engine is designed to.

I believe EOBD was not implemented in central Europe until Jan 1, 2001 which means most likely on 2001 model year and newer vehicles delivered to central Europe were required to have full EOBD/OBDII support.
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Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temp, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose temp switch O-ring - BMW #13621743299
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Old 11-17-2016, 07:17 AM   #16
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I have both 16pin and 20pin, i read no codes from the 16pin. So i just have to wait untill the 20pin arrives.
I tried to force the light to come on by pulling the wires from the airflowmeter, still no light. Wich i think seems a bit strange, but i don't have enough knowledge about this yet. Will just have to wait until i get the 20pin cabel so i can read codes from all the modules.
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Old 11-17-2016, 07:41 AM   #17
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Quote:
Originally Posted by fredrikaksdal View Post
I have both 16pin and 20pin, i read no codes from the 16pin. So i just have to wait untill the 20pin arrives.
I tried to force the light to come on by pulling the wires from the airflowmeter, still no light. Wich i think seems a bit strange, but i don't have enough knowledge about this yet. Will just have to wait until i get the 20pin cabel so i can read codes from all the modules.
A few things:

1. The 16 pin connector under the dash WILL NOT work UNLESS the round 20 pin DLC cap is installed and it has jumpers in the cap.

2. The OBDII tool you are using needs to support the proper protocol for the vehicle.

3. Vehicles like yours that were build prior to the EOBD implementation in central Europe may not trigger a warning light even if there is a significant problem, even if you attempt to trigger a fault.

4. When you pulled the connector from the MAF in an attempt to trigger a fault, keep in mind that this would only have possibly set a "Pending" fault which WILL NOT trigger a light, even in the full EOBD/OBDII compliant vehicles. A fault needs to be detected at a minimum 2 times over at least 2 run cycles before it converts from a "Pending" fault to a "Hard" fault that would then trigger the SES/CEL/MIL if the vehicle supports EOBD/OBDII.
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Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temp, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose temp switch O-ring - BMW #13621743299
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Old 11-17-2016, 07:50 AM   #18
fredrikaksdal
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The 20 pin connector have jumpers in it, but not sure about the diagnostic tool i use. It should be working on E46, but i have also ordered bmw scanner 1.4.0 so will use that one next time.

Do you have any tips on how i may trigger the light so it flashes in instrument cluster?
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Old 11-17-2016, 07:56 AM   #19
jfoj
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Quote:
Originally Posted by fredrikaksdal View Post
The 20 pin connector have jumpers in it, but not sure about the diagnostic tool i use. It should be working on E46, but i have also ordered bmw scanner 1.4.0 so will use that one next time.

Do you have any tips on how i may trigger the light so it flashes in instrument cluster?
I do not have first hand experience with pre EOBD vehicles, but the SES/CEL/MIL may never trigger on pre EOBD vehicles. You have to fully understand the history of OBDII, what its purpose is and why it was developed and then you may understand why the pre EOBD vehicles differed from the 1996 and newer OBDII vehicles in North America.

You can perform a instrument cluster test to make sure the SES/CEL/MIL actually lights up, however, the DME software controls the function and behavior of the SES/CEL/MIL.

You could consider flashing the DME to a US tune, however, your vehicle may be configured differently and probably does not have Post-cat O2 sensors so there would probably be a continuous fault.
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Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temp, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose temp switch O-ring - BMW #13621743299

Last edited by jfoj; 11-17-2016 at 08:01 AM.
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Old 11-17-2016, 11:51 AM   #20
fredrikaksdal
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When performing cluster test the light illuminates. And the car have post-cat O2.

As said before, will just need to wait until I get proper diagnostic equipment to see what fault codes the car have. Hopefully the car will pass controle without the light working (don't think thats a requierment in Norway). Took a PVC (periodic vehicle test) test a couple of days ago, and it was then i became aware that the CEL light didn't work. And the car was a bit high on the Co2. The man who controlled it said that there was two fault codes stored that should av illuminated the CEL light.

Thank's for help so far anyway =)

Last edited by fredrikaksdal; 11-17-2016 at 11:52 AM.
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