Mercedes AMG M113, without compressor from factory (not M113K) but compressor DIY-added
V8 engine 15426378 firing order (CL500 or similar chassis)
[M113 engine] 3 valves and dual sparkplugs per cyl (16 sparkplugs total), no VVTI
Need some investigation (or hint, eg pinout) regarding M113 sectrig HALL sensor
- engine harness schematic might also cast some light on this?
- although both GND and output seems to be connected to ECU (camHALL GND not connected to other GND-s in the harness, only inside the ECU)
Primary trigger VR (1072 Ohm)
- Factory trigger seems to be "inverted",
- need to swap wires so that falling edges are correct at missing tooth
- This must be verified
- [scopeshot here] is good (wire swapping not needed if the same signal), may or may not be applicable...
Secondary trigger: 1 pulse per camrot Bosch 0.232.103.027 - camHALL mid pin is GND or output?
- is this HALL sensor for sure (with +12V supply) ? Output is LOW/HIGH or pulls to GND or something weird?
pinout (uncertain, maybe middle pin is GND?)
- GND from Bosch ECU/pin39 (low current connector) brown-green
- is middle pin the output or GND? pink = Bosch ECU/pin 40 (low current connector)
- pinX is +12V (in factory harness same net as injector shared +12V) red-blue
Big mistery with secondary trigger,
- Does not react to hammer moved near and away
- Apparently same sensor as in [this m112 video] (and even same pins 39,40 in the factory engine harness, although the factory harness is not actually used), but our sensor does NOT react.
- IN THE VIDEO, middle pin seems to be GND (although he attached red probe there, it shows negative)... 12V when no iron, and 0V when ferromagnetic tool is close
Possible causes
- maybe custom harness is miswired (certainly if the sensor middle pin is GND)
- perhaps HALL sensors ruined? Or just not operate properly while connected wrong...
- maybe some weird signal (frequency output like BMW/M52 ?)
DBW
- currently factory ECU drives it, but VEMS is prepared (with bridgeoutput driver)
Ignition
- 16 sparkplugs (dual sparkplugs per cyl)
- only 8 passive ignition transformers
URLS
- MembersPage/PeepPaadam/MercedesAMGSL - very similar
- MembersPage/MercedesSelFivePointSix
- MembersPage/AmgSlovakia much more sophisticated