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1990 Benz 300E 2.6 (mine) ; 1994 E320 Wagon (wife's) ; 1993 300CE Cabrio, needs some TLC
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7,229 Posts
On a M104 HFM, the fuel pump is controlled by relay K27, not the OVP (K1/1)

(MAS was used on later M103's)
 

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'89 S124 200D / '95 C124 E320 dogleg / '95 rod bender
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81 Posts
K27 is the nice green one with a 30A fuse on top? A0015429619? And it also controls auxiliary fan (stage II)? Fuse is fine, removed relay and bypassed 30 and 87. No fuel pump working, no start.
But the aux fans do engage at stage II when relay is bypassed.

No MAS relay behind battery. I can't find it in EPC either, maybe indeed it is not required on this car.
 

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Premium Member
1990 Benz 300E 2.6 (mine) ; 1994 E320 Wagon (wife's) ; 1993 300CE Cabrio, needs some TLC
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7,229 Posts
yeah, MAS was used on later CIS cars, prior to HFM-SFI

if jumping 30 to 87 didn't fire the pumps, there's a wiring problem. pin 30 of that relay should be wired directly to battery + by way of the X4/10 power terminal on the rear side of the suspension strut tower right in front of the battery, so check it with a volt meter to verify pin 30 is 12 or 13V relative to chassis ground.

pin 87 of that relay should go directly to the fuel pumps via X36, if you uswe a ohm meter on pin 87 to ground, you should see a few ohms, probably 3-5 or something, but certainly not K-ohms.
 

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'89 S124 200D / '95 C124 E320 dogleg / '95 rod bender
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81 Posts
I think it has power from X4/10 to pin 30 of the relay but I will check again to be sure. So the problem MIGHT be into the wiring from 87 to X36 or from X36 to fuel pump connection under the rear seat (right side). Hmm... It will be a busy Saturday, hope the rain stops!
Thanks!
p.s. only one pump on my car.
 

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'89 S124 200D / '95 C124 E320 dogleg / '95 rod bender
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81 Posts
OMG...

PIN 11
Anti-theft Alarm System(ATA):
DTC Readout / Possible Cause of Failure:
2 Alarm activated, trunk sensor circuit
3 Alarm activated, engine hood circuit
6 Alarm activated, front door circuit
12 Alarm activated, ignition circuit
20 Left front door actuator, No ground connection
23 ATA armed, Open to circuit 30

PIN 6 (107 124 126 129 201 140 1988-1993?????)
8 Voltage supply interrupted (Circuit 15R)

PIN 8:
HFM-SFI
PEC
Distributor ignition
HFM Sequential multi-port Fuel Injection/Ignition system
Pressurized engine control

Led stays on, no blinks
 

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'89 S124 200D / '95 C124 E320 dogleg / '95 rod bender
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81 Posts
Green fuel pump relay behind passenger side airbag, what a pain. Perfect condition... Wiring intact so far. Nothing.
 

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'89 S124 200D / '95 C124 E320 dogleg / '95 rod bender
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81 Posts
3 generic relays 0015426719 found:
behind instrument cluster,
in driver's footwell - right side, covered by the trim
in fuse cabinet.
Bypass is useless, no fuel pump working.

Anybody has pinout diagram for ATA control module made by TEMIC and also used in W202, 129, 140? That's what I have.
 

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'89 S124 200D / '95 C124 E320 dogleg / '95 rod bender
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81 Posts
ATA system disabled on a '95 E320 coupe (eur spec) Sportline with IRCL and TEMIC ATA module also used on W202, W140, W129:
-remove the (only) plug off the ATA module located under right side carpet, same as earlier models.
-locate generic starter relay (might be behind instrument cluster, mine is on the left side of center console close to accelerator pedal.
-bypass relay (bridge pin 30 and 87).

DONE.
IRCL (infrared central locking) works fine and the fire department didn't call me so we'are good.
 

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1983 BMW 633CSi {yeah i know},88 300CE, 93 300TE, 94 SL500, 98 ML320, 01 cl500, 02 ml320
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160 Posts
hello, i did the fix on my 93 300te when the alarm failed after i played with the stereo wires {i was sitting in the post office lot and bored, most expensive stamp ever}...hot wired 1 and 2 pin on the ata.....anyway the fix worked like a charm.....car starts every time now.....but i want my alarm back..and the power door locks ! i have tried 3 different modules {124 820 5626} and none have worked...i pulled them from wrecked 93-95 wagons...what am i doing wrong in the install ? disconnect battery, install, reconnect and nada on 3 of em.....love electronics any ideas ?
 

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Premium Member
1990 Benz 300E 2.6 (mine) ; 1994 E320 Wagon (wife's) ; 1993 300CE Cabrio, needs some TLC
Joined
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7,229 Posts
the factory ATA (alarm) has nothing to do with the power locks, they are controlled by the 'convenience module' under the back seat.
 

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Premium Member
1990 Benz 300E 2.6 (mine) ; 1994 E320 Wagon (wife's) ; 1993 300CE Cabrio, needs some TLC
Joined
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7,229 Posts
I have 3 W124 cars, all with their ATA's unplugged, the 93 and 94 with the starter disable relay jumpered, and the electric locks work on all of them. so does the convenience feature (hold door lock key and all windows+sunroofs close). I've made no other mods to the circuitry.
 

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1983 BMW 633CSi {yeah i know},88 300CE, 93 300TE, 94 SL500, 98 ML320, 01 cl500, 02 ml320
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160 Posts
and BTW, i used your quick fix on the 1-2 post ATA to get the car home....i appreciate your help..i just fixed the issue of restoring it to normal.......it was the fuse !
 

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1983 BMW 633CSi {yeah i know},88 300CE, 93 300TE, 94 SL500, 98 ML320, 01 cl500, 02 ml320
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160 Posts
you jumped the relay...i did the ATA
 

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1983 BMW 633CSi {yeah i know},88 300CE, 93 300TE, 94 SL500, 98 ML320, 01 cl500, 02 ml320
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160 Posts
ok...and again...i have read all the posts i need to about jumping the ATA and the relay
my point is...nobody pointed out the obvious in any post about fuse "c"....every body wants to jury rig it........not one mention about "c"
 

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Premium Member
1990 Benz 300E 2.6 (mine) ; 1994 E320 Wagon (wife's) ; 1993 300CE Cabrio, needs some TLC
Joined
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7,229 Posts
I disabled the ATA because the alarm was going off randomly, due to 20-30 year old microswitches and wiring and/or failed ATA module innards. all fuses were good, replaced with fresh copper/brass Flossr ceramic fuses.
 

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This is my write-up for those people who have a funky alarm like mine. I have been putting this off for a while now, but decided to tackle it since i had the cluster out for some other work....

The problem: alarm goes-on when i unlock the car from the driver's door.

Solution: Disable the alarm. You can try to fix it, but i understand it will cost a fortune, and too much of a headache for me. Besides, i don't need it !!!

Step 1: Disconnect the car battery so that the alarm does not go-off, or you get hit by an airbag while removing the cluster.

Step 2: Locate the alarm. In my case, it is under the passenger's feet. remove the floor mat and the foam-backed carpet piece. Unbolt the bolt holding the black plate in place. The alarm is the black box on the left with two big plugs going into it (second picture).





Step 3: Unplug those big plugs. On pre 1993 cars, this should be sufficient to disable the car. Not the case though for 1993+ cars as they have an immobilizer feature that is triggered when the alarm is disabled. so my car would not start after unplugging those two plugs.



Step 4: You have to find the relay with the name k38. It is located under the instrument cluster. by jumpering this relay, you will be able to by-pass the immobilizer, and have a fully functional car without the alarm. So proceed to removing the instrument cluster as seen below, that is the nastiest part of the job as that thing is tricky....in the picture, the cluster is removed



Step 5: Locate the k38 relay. it is in the upper left corner of the cluster space. it is shiny silver in color on my car....pull it out by hand- easy!!





Step 6: in order to bypass the immobilizer feature, you need to jumper pins 30 and 87 on the relay, see the picture below. I ran a copper wire between the two pins. Make sure the wire is as flat as possible so that the relay seats properly





Step 7: put the relay back in place. connect the battery without tightening the terminal. try to start the car, if it starts, remove battery and install cluster.

Step 8: tighten battery terminal, and enjoy your car with no annoying alarm !!!!!👍 Easy job over all. the hardest part was removing the cluster.....

Good Luck
Hi i have 93 e320 the alarm wont switch off and car wont turn over mine is slightly different to yours as the k38 and alarm system is under the bonnet i have tried jumping pins but still wont turn over indicators still flash even when i dicconect the 2 plugs to the alarm there is a red led on the console by the gear stick which i dont remember on my other car as it looks after market could this be an after market system no fobs with car just a key thanks
 
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