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, we think middle pin is HALL output, red-blu is +12V)
- GND from Bosch ECU/pin39 (low current connector) brown-green
- is middle pin the output, correct? 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,
- Ours does not react to hammer moved near and away (when powered +12V, of course)
- 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 signal output as assumed (he attached probes reversed in DVM, never mind)... 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