Emission Issues - Page 2

wpoll · #1 07-29-2018, 04:56 PM

Thanks for confirming, andrewwyn.

The cap I'm talking about is the factory dust cap that fits onto the 20-pin connector. Inside this cap there are jumpers and unless this cap is on the 20-pin connector (locked down) the inside 16-pin connector is dead.

If your cap is missing, then as andrewwyn suggested, you will need to jumper a few of the pins on the 20-pin in order to get the 16-pin functional.

Have a look at this thread...

https://xoutpost.com/bmw-sav-forums/...-icarly-2.html

andrewwynn · #2 07-29-2018, 04:58 PM

Awesome yes that's exactly what I'm talking about. Just two jumpers.

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wpoll · #3 07-29-2018, 10:37 PM

As long as that cap in installed (plugged in) the 16-pin OBD port in the car should work 100% for emission testing.

With the addition on the small wire link shown in the other pictures, the 16-pin ODB port in the car should work 100% for all diagnostics, emission testing included.

Ensure the 20-pin cap is on and go for the test. At least, that's how it should work.

If the emission testing station is trying to connect via the 16-pin when the 20-pin cap is off (open) it will fail.

cuban_bmwx5 · #4 07-29-2018, 11:40 PM

Quote:

Originally Posted by wpoll

As long as that cap in installed (plugged in) the 16-pin OBD port in the car should work 100% for emission testing.

With the addition on the small wire link shown in the other pictures, the 16-pin ODB port in the car should work 100% for all diagnostics, emission testing included.

Ensure the 20-pin cap is on and go for the test. At least, that's how it should work.

If the emission testing station is trying to connect via the 16-pin when the 20-pin cap is off (open) it will fail.

when i went in for the test the emission computer would not communicate with the car and the 20 pin cap was closed not open so i got a fail and i went to another place and i got the same thing.. but i just seen that picture u posted and my cap does not have that jumper i see that u have is that what i need?

wpoll · #5 07-29-2018, 11:47 PM

Quote:

Originally Posted by cuban_bmwx5

when i went in for the test the emission computer would not communicate with the car and the 20 pin cap was closed not open so i got a fail and i went to another place and i got the same thing.. but i just seen that picture u posted and my cap does not have that jumper i see that u have is that what i need?

You shouldn't need the jumper for just emissions testing - the jumper on the cap is to enable access to the modules other than the engine and trans (via the 16-pin ODB connector), as the later E53 cars have.

Emission testing via the 16-pin connector was a legal requirement in some countries from as early as 1995, hence BMWs half-arsed solution to get it working on the early E53 cars.

In your case either the cap is incorrectly installed, faulty or you may have some other issue. I guess adding the jumper can't hurt, so why not try it?

cuban_bmwx5 · #6 07-30-2018, 06:16 PM

Quote:

Originally Posted by wpoll

You shouldn't need the jumper for just emissions testing - the jumper on the cap is to enable access to the modules other than the engine and trans (via the 16-pin ODB connector), as the later E53 cars have.

Emission testing via the 16-pin connector was a legal requirement in some countries from as early as 1995, hence BMWs half-arsed solution to get it working on the early E53 cars.

In your case either the cap is incorrectly installed, faulty or you may have some other issue. I guess adding the jumper can't hurt, so why not try it?

where can i buy/find this jumper?

cuban_bmwx5 · #7 07-30-2018, 09:07 PM

Quote:

Originally Posted by wpoll

You shouldn't need the jumper for just emissions testing - the jumper on the cap is to enable access to the modules other than the engine and trans (via the 16-pin ODB connector), as the later E53 cars have.

Emission testing via the 16-pin connector was a legal requirement in some countries from as early as 1995, hence BMWs half-arsed solution to get it working on the early E53 cars.

In your case either the cap is incorrectly installed, faulty or you may have some other issue. I guess adding the jumper can't hurt, so why not try it?

is this wire good to use as a jumper?

andrewwynn · #8 07-29-2018, 11:29 PM

Wow are you saying I can add that jumper and no longer need to do wife's car obd under the hood?

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wpoll · #9 07-29-2018, 11:37 PM

I've not actually done it myself but folk here have and it's what I read, both on forums and in the technical literature (circuits etc.).

I don't know why anyone would not do this... unless they had other vehicles that use the 20-pin interface.

wpoll · #10 07-31-2018, 03:39 AM

Should work by the looks of it. So long as it contacts both the pins it is wrapped around properly, it will work fine. Pin 2 ties to pin 20, at least in all the images I've seen. Presumably the factory fitted cap connects pin 17 to either pin or pin 20 (not sure which) but it doesn't matter - the suggestion is that a jumper from pin 2 to pin 20 will allow for full ODB access on the 16-pin connector (when the 20-pin cap is in place).

Not sure this wil sort your emission testing issues but as I said, what's to loose?