[W126 Coupe] ASR and Emissions Testing

[Jay Hirsch]

Without knowing the scenario whoever or where ever  your car was on the emissions dyno  did not know what they were doing.
keep cruisin
Jay
On Dec 2, 2011, at 10:16 PM, Richard K. Hallberg wrote:


> On 12/2/2011 8:00 PM, Steve Nervig wrote:

>> On Dec 2, 2011, at 4:51 PM, Richard K. Hallberg wrote:

>> 

>>> The tip worked.  Passed emissions with room to spare.  Arrived, turned off ignition, removed single philips-head screw, depressed spring-latch&  lifted connector latch-end first.  This was really quick.

>>> 

>>> Richard

>>> 

>>> On 12/2/2011 4:14 PM, Jonathan Hodgman wrote:

>>>> Rich,

>>>> 

>>>> You can also pull the cover on the ABS/ASR module and pop out the relays, takes about 3 min to do..:)

>>>> 

>>>> Jonathan

>>>> 

>>>> On 12/2/2011 3:39 PM, Richard K. Hallberg wrote:

>>>>> In Atlanta, GA the emissions test stations perform a programmed test with the rear wheels sitting on rollers (like a dyno).  My 91 560sec nearly jumped off the rollers with the ASR defeat switch on or off.  By pure luck, I found in the 126 Chassis&  Body Manual a note on page 1223 in section 42-0810 that mentions that  "The connector from the ABS/ASR control module (N30/1) MUST BE DISCONNECTED before driving on to the performance test bench or speedometer tester".  I don't recall any mention of this on mbcoupes or BenzWorld in the three years I have been a member.  Any thoughts??

>>>>> 

>>>>> I will try this trick at the emission test station and report back - hopefully works.

>>>>> 

>>>>> Richard Hallberg

>> Richard, I'm curious - you called it an ASR defeat switch. Is it a real defeat switch or is it the snow chain switch on the dash? If the later, that switch does not shut off ASR, it just modulates it a bit.

>> 

>> Regards,

>> Steve

> Steve, you are correct, I misnamed the switch.  The precaution, though, is unaltered.  If you have a problem with the ASR, such as mounting a spare wheel with a slightly (or not) different tire, Jono's suggestion of pulling the relays under the cover of the ABS/ASR module would would be a more tidy method of defeating an undesirable ASR response until you were able to rectify the problem, as the tire chain switch would not be a solution - it may be a fair assumption that it also would work if there were problems with ASR sensor signals.  The symptoms are unusual intermittent braking which are annoying, at the least.  Thanks for the clarification on my terminology - I was a bit unnerved at trying to figure a solution.

> 

> Thanks, again,

> 

> Richard

> 

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>> 

>> 

> 

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