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Old 10-06-2010, 10:47 AM
baudenfj baudenfj is offline
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Join Date: May 2009
Location: Nashville, TN
Posts: 57
Is my EA/CC/ISC control module shoot?

Dear Forum Gurus...

my e320 1995 wagon is in limb home mode! The RPM are limited to 1500 rpms and it idles at 1000rpm! I know everybody would say wiring harness - NO it is not it was replace... Next would be the OVP... NO it is new also...

The next ones would say read the error code! Here we goo... (YES I cleared the old ones!)

PIN 8 shows...
- 8 Idle speed control (ISC) system at upper or lower control stop or CC or EA indicates "limp
home" mode.

45 Fuel safety shut-off of electronic accelerator or cruise control active

Pin 14 shows...

2 EA/CC/ISC control module (N4/1) or Safety contact switch (M16/1s1) or Stop lamp
switch or Cruise control switch or Actual value potentiometer or Starter lock-out/back-up
lamp switch or engine speed signal or vehicle speed signal or closed throttle position
switch or safety relay in EA/CC/ISC control module

11 Closed throttle recognition signal to engine control module (HFM-SFI or Left LH-SFI)
Fuel safety shut-off to engine control module (HFM-SFI or left or right LH-SFI)

Now things get trickier! - Not knowing what to do I replaced the ETA! Mainly because in the manual there is a scenario described between a mismatch between the readings from the two potentiometers in the ETA if the cruise control is not activated...

HOWEVER I replaced the ETA and same story..

I will check the wiring next but what I noticed that the ETA seems to be operated at 5 V! This is highly unusual for a car electronic and would it point to the unit itself being shoot?

Has anybody one of these units laying around in the Nashville area so I could check it? Obviously it has to work and come out of a running car!

OR anybody with a scan tool which can read the sub codes!

ANY other suggestions?

Cheers,...
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