Intermittent, No circuit 50 signal to engine ecu, stall on light throttle
08-23-2024, 04:50 PM
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Sprinter mwb w906 2018
Intermittent, No circuit 50 signal to engine ecu, stall on light throttle
Hello I am hoping for some help with a sprinter w906 2018 314 CDI manual
The van will start once in 50 attempts.
The Ezs sends the circuit 50 signal but the dme doesn't receive it ( per xentry )
When the van starts, the dme instantly shows circuit 50 received and starts.
When the van does start, it stalls on very light throttle 1 -1.5k. literally impossible to hold it.
If I rev it to 2k+ it'll hold it all day but it will loose communications to xentry dme.
The engine can bus has correct voltages and resistance, interior can has correct voltages but mega ohms resistance. Unsure if it has terminating resistors or not.
The van has no fault codes
Had replacement ECU and front Sam
Start authorising every time
Just no start signal into dme.
Any thoughts on my next testing point ?
Oscilloscope on engine can bus ?
How to test if start signal is actually getting to dme ?
Issue with Ezs ? Only pretending to send signal ?
Could this also cause ruining issue ?
Any help would be gratefully received
The van will start once in 50 attempts.
The Ezs sends the circuit 50 signal but the dme doesn't receive it ( per xentry )
When the van starts, the dme instantly shows circuit 50 received and starts.
When the van does start, it stalls on very light throttle 1 -1.5k. literally impossible to hold it.
If I rev it to 2k+ it'll hold it all day but it will loose communications to xentry dme.
The engine can bus has correct voltages and resistance, interior can has correct voltages but mega ohms resistance. Unsure if it has terminating resistors or not.
The van has no fault codes
Had replacement ECU and front Sam
Start authorising every time
Just no start signal into dme.
Any thoughts on my next testing point ?
Oscilloscope on engine can bus ?
How to test if start signal is actually getting to dme ?
Issue with Ezs ? Only pretending to send signal ?
Could this also cause ruining issue ?
Any help would be gratefully received
