1992 500e ASRlight- help
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Joined: May 2005
Posts: 2
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1992 500e ASRlight- help
Hi guys my mechanic has been pulling his hair out with my 500e ASR light. There is lots out there but seems to be mostly shotgun part changing. Anyone have some constructive advice? Thanks as always
problem; ASR light on and stuck in limp home mode
1992 500e m/b
Tried Replaced upper and lower engine harness still has ASR//LH
With a launch scan tool I have a code 051 from the EA/CC/ISC module and 06 from DM module
051 Idle safety contact switch M16/1s2
06 Idle speed control incorrect fault from EA/CC/ISC
Testing the electric accelerator the switches show that they are working.
Using the scan tool the m16/1s2 is on until half throtle and then off
m16/1s1 is off until half throtle and then on
ohm test shows the same.
__________________
Thanks
2003 G55 sold
2000 G500 cab black/black
1992 500E black/black
2008 ML63 silver/black
2000 G500 silver/black
problem; ASR light on and stuck in limp home mode
1992 500e m/b
Tried Replaced upper and lower engine harness still has ASR//LH
With a launch scan tool I have a code 051 from the EA/CC/ISC module and 06 from DM module
051 Idle safety contact switch M16/1s2
06 Idle speed control incorrect fault from EA/CC/ISC
Testing the electric accelerator the switches show that they are working.
Using the scan tool the m16/1s2 is on until half throtle and then off
m16/1s1 is off until half throtle and then on
ohm test shows the same.
__________________
Thanks
2003 G55 sold
2000 G500 cab black/black
1992 500E black/black
2008 ML63 silver/black
2000 G500 silver/black
Junior Member
Joined: Apr 2010
Posts: 74
Likes: 0
From: Des Plaines, IL
1995 E320
Thats interesting, never would of thought a neutral switch would cause that issue, wouldn't the car not start with a bad neutral switch, or is that only if park switch is bad. i forget
Junior Member
Joined: Feb 2004
Posts: 32
Likes: 0
From: California, USA
1992 500E
IMHO, Jim is spot on. I had an ASR/Limp Home Mode problem in my 500E for months. Cruising down the freeway and BAM - LHM for no apparent reason. I checked all the usual suspects but still kept getting LHM. Until I changed the Neutral Safety Switch on the tranny ... fixed the problem. No more LHM.
