I have the original ECU in my heater and am able to read and clear codes.
If you're controlling your heater with the overhead central electronic console then you most likely have the OEM ECU as well.
If that's the case then you might want to insure the blue diagnostic wire is connected as it should be under the drivers seat.
There should be a blue wire connected to a blue/white wire via a rectangular plug as pictured below:
I've never heard of the issue wherein the heater output remains in low heat mode when high heat is required...
You might want to confirm that you have a good solid 12.4 volts or greater at the heater when the glow plug is drawing current.
Low voltage at the heater can lead to various problems...
For me replacing the burner tube corrected the white smoke issue.
Specifically see this thread:
In general review these threads:
FWIW: Reading codes probably won't shed much light on the white smoke issue...
If you're controlling your heater with the overhead central electronic console then you most likely have the OEM ECU as well.
If that's the case then you might want to insure the blue diagnostic wire is connected as it should be under the drivers seat.
There should be a blue wire connected to a blue/white wire via a rectangular plug as pictured below:
I've never heard of the issue wherein the heater output remains in low heat mode when high heat is required...
You might want to confirm that you have a good solid 12.4 volts or greater at the heater when the glow plug is drawing current.
Low voltage at the heater can lead to various problems...
For me replacing the burner tube corrected the white smoke issue.
Specifically see this thread:
espar failure
thanks again Oneman, I did see this post before but it makes a lot more sense now, and I ordered some connector parts thru digikey. but what source to get diagnostic compatible connector thru? I did email Roy Murkin at Le Tonkinois to see if he could cut off a connector off a discarded D4...
sprinter-source.com
In general review these threads:
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sprinter-source.com
FWIW: Reading codes probably won't shed much light on the white smoke issue...
