OK in a quick research this seems to be the issue but will need to get
the car to check and see:
http://www.peachparts.com/shopforum/diesel-discussion/351031-w210-glow-plug-issue-97-e300d.html
Looks like if the connector is not connecting then the IP won't pump any
fuel, which is why the guy suspected the IP.. Damn wouldn't it be cool
if it is just a bad connector!
--FT
tjts1 <http://www.peachparts.com/shopforum/members/tjts1.html> tjts1 is
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Join Date: May 2009
Location: The slums of Beverly Hills
Posts: 6,228
Quote:
Originally Posted by *treiberg* View Post
<http://www.peachparts.com/shopforum/diesel-discussion/351031-w210-glow-plug-issue-97-e300d.html#post3383292>
Back to this issue again. Car has been running fine for several months,
with only a few times where light wouldn't come on, but usually if we
just waited an hour or two, we would finally get the glow plug light and
then car would fire up. But now I cannot get glow plug light on and
engine will not start without it. Here is a tally of what I have
investigated:
-glow plug resistance appears to be fine, all in the 0.6 to 0.8 ohm range
-glow plug relay seems to be fine, at least I see it providing 12V to
output blades when I energize it, and you can hear relay click
-replaced the K40 relay
-problem appears to be worse when engine or ambient is hot
The problem appears to be that the signal to energize the relay is not
working. I cannot consistently get 12v at the two input wires to the
glow plug relay. My understanding is that this starts with the ignition
switch, but it is also enabled by the temperature sensor located under
the manifold. I wonder if this sensor has gone bad...??
Also, I need to start the car to move it. So I figured if I just apply
12V to the input side of the glow plug relay, then it will pass power to
the glow plugs and I will be able to start it after 10-15 seconds - sort
of bypassing the electronics that send the 12v. However, when I do this
the relay only pops on for 1-2 seconds and turns right back off again,
not nearly enough time to energize those plugs to allow me to start. Is
that relay somehow super smart and know that my 12v is different than
the one from the ECU?
If anyone out there has some input, or can even provide a wiring diagram
for a 97 E210 E300D, that would really help.
I went through this exact issue with my 97 a couple of weeks ago. First
of all trying to hot wire the GP relay is not going to work because this
GP relay is digitally controlled by the engine computer. Even if you
manage to hotwire it, the computer won't allow fuel to the IP if it
doesn't have clear communication with the GP relay. The GP relay has a
PIC16 micro controller in it. There is a small 2 wire (3 pin) plug on
the GP relay with a white and brown wire. Brown is ground and white is a
data line from the engine computer. Grab that plug and wiggle it a bit.
You'll see it has some play. The plug is poorly designed and
intermittently cuts the data signal between the engine computer and GP
relay.
The solution is fairly simple. Solder your own wires to pins 1 and 2 of
the 3 pin plug on the GP relay and use standard off the shelf plugs to
securely plug it into the car's wiring harness (brown and white wires).
Leave everything else the same. You will also need to connect to the
OBD2 port and delete the stored code (P0380 i think).
Heres an older thread where we discussed the issue and the fix.
GP relay help - 1997 E300 om606.912
<http://www.peachparts.com/shopforum/diesel-discussion/358272-gp-relay-help-1997-e300-om606-912-a-2.html>
My car went from intermittent no start to totally reliable starts after
this modification. MB issued a service bulletin about this very issue.
Quote:
SUBJECT: DEALER TECHNICAL BULLETIN 31/98
31/98-1 RECALLS AND SERVICE CAMPAIGNS: WHEN REPAIRING ANY VEHICLE,
ALWAYS CHECK THE VEHICLE MASTER INQUIRY FOR OPEN CAMPAIGNS
31/98-3 GROUP 07 - ALL DIESELS AS OF MY 96 (210.020, 210.025): For
conditions of code P1482 (preglow control module) in engine ECU, in
addition to the tests outlined in Diagnostic Manual 1.1 and 1.2,*please
check the electrical line and connectors between the preglow control
module and the engine ECU (signal wire / ground and voltage supply) for
possible intermittent contact, open contact, short to ground and / or
power.* If all checks OK, replace preglow control module. These
additional tests are necessary to obtain a more precise definition of
code P1482. In case of warranty, please use Damage Code according to
identified problem.
H. Polz, Service Engineering
HPdg 12-18-98
On 1/22/20 4:53 PM, Buggered Benzmail wrote:
Hmmmm I’ve got the smashed $500E300... do some swap. don’t like white
much but it looks half nice. $500 would be more like it...
https://www.facebook.com/marketplace/item/172589444114706/
1200$
Needs injection pump or pump rebuild
Ran and drove perfect
Drivetrain good for 1million miles diesel
--FT
Sent from iPhone
--
--FT
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