92 500sl wheel speed sensor checking, ASR problem
#1
07-14-2010, 02:58 PM
92 500sl wheel speed sensor checking, ASR problem
Hello,
After a few days of searching, I have determined that my 1992 (9/91) 500SL convertible (73k miles) does NOT have the dreaded biodegradeable wiring. As I mentioned in earlier posts, the ASR and ABS lights come on once you start the car and move away from a stop. The only fault code is showing up as an Electronic Throttle Actuator (ETA) problem, but the local shop said there was no signal coming from the rear wheel speed sensors.
I have the MB 129 factory wiring CD, but can't determine where the speed sensor signals come into the correct computer module.
What I think I know: 1) the ASR module is the most forward computer module oriented from left to right in the area in front of the passenger side firewall within the engine compartment. 2) The connector to this module is labeled N30/1 in the MB factory wiring CD. 3) The ETA may still be causing a problem due to an internal potentiometer. 4) The ETA is the small somewhat cylindrical device, dead center in front of the engine (never could find a picture of this???!! anywhere), controlling the rods and mechanical pieces going toward the back of the engine.
If anyone can correct my assumptions above, thank you in advance.
Cordially,
Jeff
After a few days of searching, I have determined that my 1992 (9/91) 500SL convertible (73k miles) does NOT have the dreaded biodegradeable wiring. As I mentioned in earlier posts, the ASR and ABS lights come on once you start the car and move away from a stop. The only fault code is showing up as an Electronic Throttle Actuator (ETA) problem, but the local shop said there was no signal coming from the rear wheel speed sensors.
I have the MB 129 factory wiring CD, but can't determine where the speed sensor signals come into the correct computer module.
What I think I know: 1) the ASR module is the most forward computer module oriented from left to right in the area in front of the passenger side firewall within the engine compartment. 2) The connector to this module is labeled N30/1 in the MB factory wiring CD. 3) The ETA may still be causing a problem due to an internal potentiometer. 4) The ETA is the small somewhat cylindrical device, dead center in front of the engine (never could find a picture of this???!! anywhere), controlling the rods and mechanical pieces going toward the back of the engine.
If anyone can correct my assumptions above, thank you in advance.
Cordially,
Jeff
Last edited by mbjeff; 07-14-2010 at 02:58 PM. Reason: spelling
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