new here have immobilizer questions

[aquaboyracing]

hey everyone just bought an 87 e30 325 is with 153,000 carefully driven miles off my dad lol. he let the car sit for a year inside his garage he changed out the battery to try to get car running for when i picked it up last weekend and now car will not start no fuel or spark. ive ohm ed out cps sensor it seems fine. i have jumped fuel pump relay and fuel pump will run. i believe it is the factory immobilizer stopping the car from starting. it did say code at first and i found a code that i believe is the correct one in owners manuel that was hand written obviously. it does not say code anymore when i turn ign on. how do i go about making sure its not the alarm system keeping the car from starting. the car ran fine and started every time till he parked it and changed out battery, we had to trailer it to my house. engine cranks fine but no power to coil or fuel pump. sorry to bring all my problems with me to this site lol i just want to be able to drive this beautiful piece of machinery. ive looked online as to by pass the immobilizer and find mixed results. if someone knows how to make sure immobilizer is bypassed and dosnt want to post for obvious reasons please pm me. ive played with it for two nights now and its starting to wear on me....btw its the obc with 13 buttons if that helps, any advise would be greatly appreciated

[jlevie]

Unless added, the car doesn't have an imobilizer (though it does have a lockout feature in the OBC). After changing the battery, it is normal for the radio to show CODE. That is the radio's anti-theft provision and has nothing to do with the engine.

No spark and no fuel will be:

No timing data to the DME
A problem with DME power or ground
No START signal to the DME
A bad DME

[dnguyen1963]

There is a code for the radio and one for the OBC. If you enter the wrong code for the OBC, the engine will crank all day without starting. If this is the case and you do not have the correct code, you will need to find another DME to switch out. I am not sure if you need another OBC because I am not quite certain that the code is NOT stored in the OBC. Did you ask your dad to see if he ever entered a code in the OBC?

Here is a procedure you can try:

EMERGENCY START PROCEDURE – IF CODE HAS BEEN LOST:

* Disconnect battery for 5 minutes, or more.

* Reconnect battery.

* Turn ignition key to position 1 (alarm should sound).

* A time display will appear and run down to zero (for 15 minutes).

* After 15 minutes, the engine can be started.

During the waiting period of 15 minutes, the code can be re-entered.

* Press CODE button.

* Input desired code.

* Press the S/R button.

* Start the engine.

[aquaboyracing]

i tried unhooking the battery and all different types of waiting with key in different positions btw i never hear a buzzer go off when i reconnect battery. the obc said code at first but does not anymore after i entered a 4 digit number i thought may have been the correct code. i will have to check dme tonight. and when i hook battery up i never see the obc count down i can just scroll through the different modes. range, timer, code ect. for some reason i thought that lock out on obc went to and immobilizer. under the drivers side dash there are two boxes what appears to be the ecm and then a black plastic box behind it. on passenger side behind glove box there is the motoronic bosch box and then another box mounted to the left of motronic box and bolted to underside of dash. correct me if i have these computers wrong or if one shouldnt be there. i do have a whole repair manuel but at this point does not seem to be very helpful. btw this was the first car i learned to drive stick in and now i own it i cant wait to get her back on the road its killing me inside. i think im bailing out of work to go play with it shhhh dont tell;D

[aquaboyracing]

i have even jumped the dme using three pieces of wire and car will still not crank doing this i thought this should by pass everything and make car crankn could it be one of the sensors on the bell housing that looks at fly wheel. i have not even looked at them yet

[FLG]

Once the battery is disconnected the code should be removed from the obc anyways. Idk about previous post, never seen a count down, but besides that dosnt seem to be your issue.

Are you saying the engine is not even cranking?

Could be bad starter, have you tried pop starting? (assuming 5 speed)

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[aquaboyracing]

No it cranks great no spark or fuel when we jumped main engine relay to try to make car crank it does not it will crank with key is it possible one of the sensors in bell housing could cause this... Ran out of time last night to check everything I wanted to. Because jumping three pins together with wire from dme did not make car crank I'm assuming it's not getting power

[nando]

There is a code for the radio and one for the OBC. If you enter the wrong code for the OBC, the engine will crank all day without starting. If this is the case and you do not have the correct code, you will need to find another DME to switch out. I am not sure if you need another OBC because I am not quite certain that the code is NOT stored in the OBC. Did you ask your dad to see if he ever entered a code in the OBC?

Here is a procedure you can try:

EMERGENCY START PROCEDURE – IF CODE HAS BEEN LOST:

* Disconnect battery for 5 minutes, or more.

* Reconnect battery.

* Turn ignition key to position 1 (alarm should sound).

* A time display will appear and run down to zero (for 15 minutes).

* After 15 minutes, the engine can be started.

During the waiting period of 15 minutes, the code can be re-entered.

* Press CODE button.

* Input desired code.

* Press the S/R button.

* Start the engine.

I'm pretty sure the CODE feature in the DME is not permanently stored. the DME has no non-volatile memory. It'll be erased/reset completely once you unplug it from constant power.

[jlevie]

The code feature is implement only in the OBC. When activated in the OBC every time the ignition is turned on it will ask for the code and until given the OBC relay will prevent the START signal from reaching the DME. Nothing in these cars has non-volative memory. So a battery disconnect will reset everything to the default state.

[aquaboyracing]

What could cause no start signal to dme if we're ruling obc out since I've disconnected battery and isn't asking for a code anymore

[FLG]

Have you checked all your fuses?

What part of PA are you in? I can't make promises but I'll be in Irwin visiting the gf tomorrow and Thursday.

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[aquaboyracing]

Ellwood city about 40 minutes from downtown Pitt I would be in decent shape if something mechanical but being new to e30 this wiring is screwing with me

[aquaboyracing]

And yes on the fuses

[FLG]

Was hoping you were a bit closer to irwin. Will have to play it by ear, very tight time frame when I get there.

Have you checked to see that the dme is getting switched and constant power from the battery? It's possible bad fusible link in the trunk which gives power to the dme (smaller wiring coming off the positive feed)

Idk the pins off hand but do a quick search for the dme pin out and check to make sure it's getting power. Should be 2 different pins, one is constant one is switched (when you turn on ignition)

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[aquaboyracing]

Just checked it's getting power constant and switched we found some thing last night that showed how to bridge the pins it should have made car crank... It did not. Fuse in trunk is good. I'm getting over my head I know I should probably check pins from ECM ... This Bentley Manuel is helpful but only so far lol