No signal to any fuel injector on my 97 e320
Thread Starter
Junior Member
Joined: Feb 2004
Posts: 17
Likes: 0
96 S320 and 97 E320
No signal to any fuel injector on my 97 e320
Tested with a noid light. With a voltmeter i saw +12v to ground on one lead and +6.5v to ground on the other. Checked my S320, noid light worked and lead to ground that was +6.5v showed 0v on the S320.
Anybody care to comment?
UPDATE - Found this a few minutes ago:::
On vehicles starting model year 1996 (HHT Diagnosis Version 46), the
RCL system is enhanced with a so-called drive authorization system,
stage 2 (DAS).
The activation of the drive authorization system (DAS) is initiated by
the RCL control module and transmitted to the engine control module
via the CAN data bus.
After activation of the drive authorization system (DAS), the fuel
injection system is rendered inoperative by the engine control module.
The drive authorization system (DAS) can be activated or deactivated
with the infrared remote control transmitter or the master key.
The engine control module and RCL control module are permanently
locked with one another by an identification code. This identification
code can not be erased (see HHT actual values “DAS“ menu
selection 3/6).
Anybody care to comment?
UPDATE - Found this a few minutes ago:::
On vehicles starting model year 1996 (HHT Diagnosis Version 46), the
RCL system is enhanced with a so-called drive authorization system,
stage 2 (DAS).
The activation of the drive authorization system (DAS) is initiated by
the RCL control module and transmitted to the engine control module
via the CAN data bus.
After activation of the drive authorization system (DAS), the fuel
injection system is rendered inoperative by the engine control module.
The drive authorization system (DAS) can be activated or deactivated
with the infrared remote control transmitter or the master key.
The engine control module and RCL control module are permanently
locked with one another by an identification code. This identification
code can not be erased (see HHT actual values “DAS“ menu
selection 3/6).
Last edited by ddz; Aug 12, 2012 at 03:29 AM. Reason: update
Newbie
Joined: Nov 2020
Posts: 2
Likes: 0
1997 e320 m104
Hi ddz, I realize this is an old post and I hope this question reach you.
the car is 1997 e320 (210.055) with m104.995 engine
I have been having a misfire on cylinder #6 and still cant get to the source of the problem; note car still start and run.
The basic tests been done and code didn't move to any other cylinder (always p0306):
spark plugs, coils and wires... all good.
I switched injectors between 6 and 3, code is still p0306.
Trying to trace back, when engine off and key is in on position, I get the same readings on the injector connector pins:
one is 12v and the other is 6.5v
I am really confused because when engine is running, injectors seem to work..
why does it read 6.5v and is it normal?
how did you fix the issue?
any help is appreciated
Thanks!
the car is 1997 e320 (210.055) with m104.995 engine
I have been having a misfire on cylinder #6 and still cant get to the source of the problem; note car still start and run.
The basic tests been done and code didn't move to any other cylinder (always p0306):
spark plugs, coils and wires... all good.
I switched injectors between 6 and 3, code is still p0306.
Trying to trace back, when engine off and key is in on position, I get the same readings on the injector connector pins:
one is 12v and the other is 6.5v
I am really confused because when engine is running, injectors seem to work..
why does it read 6.5v and is it normal?
how did you fix the issue?
any help is appreciated
Thanks!
Newbie
Joined: Nov 2020
Posts: 2
Likes: 0
1997 e320 m104
after doing some basic testing as mentioned befor, I hooked up the ecu, battery and everything back; the car drives great and relatively smooth with no misfires codes triggered. Found out that only when I push it little hard say over 4000 rpm.. is when it misfires..
read that besides the obvious coils wires plugs, an upstream o2 sensor going bad (no code triggered yet) can cause that..
as for vacuum leaks, I also was tracing any leaks; the previous owner had the lines in and out the vacuum distributer (just next to the ecus box shown in the pic) hooked up very weirdly and I have been trying to find the right vacuum diagram. I know the grey line goes by the firewall and eventually to the intake manifold, but not sure if any branches before the intake, like is there even vacuum lines connected to the the trans 722.605 as other models do; and for sure no idea where that yellow check valve should be..
I did reconnect the red, white, green lines correctly, but still dont know about the yellow valve
(I plan to clean the egr pipe as well..)
again thanks and any help is appreciated
