Explicit information on some BMW E46 M3 engine install.
We suspect that ECU has HALL primtrig input and VR primtrig sensor is actually used, but no clear info from customer about either, so (what are we doing?)...
Not specifying (=> guessing) trigger type or falsely specifying serialnr (=>guessing) ECU serialnr (or, in this case both :-) makes support impossible (perhaps suitable for a Mr. Bean epizode though).
Be exact about the sensor type, measurement details so practical advice can be formed and support can be attempted.
Primary trigger
VR or HALL ?
Check basic things
If VR:
- measure VR sensor resistance (expected: 400..1400 Ohm)
- also measure (with ECU disconnected) between EC36/pin27 and EC36/pin26: is resistance the same ?
- with ECU powered and sensor connected: measure DC voltage on EC36/27 (expect +150..250mV)
If HALL trigger:
- measure HALL supply DC voltage (usually +5V, rarely +12V)
- optional (note): HALL supply current is usually 6..15mA
- please measure EC36/27 voltage with sensor disconnected (expect >4V)
- and with a 1k between primtrig sensor and GND (0.8 .. 1.5V expected).
- If not good: apply a 4k7 .. 6k8 "pullup" resistor between signal and +5V and repeat measurement.
- can you scope EC36/27 HALL signal ? 0.5V / 4V or similar ?
I hope that helps, we can continue with some useful input.
In anything trigger related the trigger type is important to mention. A working HALL sensor is used ? v3/10112 has HALL/HALL inputs and it will NOT work with VR sensor (as suspected to be the case); the spare ECU might have VR input and that explains why it works.
In VT report v3/10172 is explicitely mentioned (but probably wrong), it seems false. We think from the log filename the ECU is likely
v3/10112 (from oid10258):
1 x ECU VEMS V3
- withSDcard: no
- Service: normal
- secondary_trigger: HALL
- primary_trigger: HALL
- mounting-style: flanged case
- MAP connection: 300 kPa simplenipple
- LCD connection: no
- Knock input channels: 1
- ignition driver: 8
- Flyback: HighZ-only 30V flyback
- EGT input: no
- 1-wire interface: no
Note : 10172 was FALSE most likely, but v3/10172 from OID10493 has VR !!!! :
1 x ECU VEMS V3
- 1-wire interface: no
- EGT input: 1
- Flyback: HighZ-only 30V flyback
- ignition driver: 8
- Knock input channels: 2
- LCD connection: no
- MAP connection: 300 kPa simplenipple
- mounting-style: flanged case
- primary_trigger: EC36/27 VR
- secondary_trigger: EC36/13VR