Grid heaters not working since high idle cold start enabled at dealer

[Seanjj]

It seems since I brought my truck into the dealer for the 3 cylinder high idle cold start enabling my grid heaters haven't worked. I see the wait to start light come on but the voltage doesn't change. I have to plug it in even at 0'C now or it won't start. Lots of white smoke for the first few minutes when I do get it running . Could there be another problem I'm missing maybe? Can a dealer possible program stuff to mess up or maybe accidentally delete my grid heaters somehow?

[klcammie]

Any codes? sometimes when working on truck I knock the little wire to grid heater relay loose and they wont work. Of course when I do that I get a code.

[Mopar1973Man]

Check your wiring for the grid heaters. See if the fusible links have failed. See if the any P0380 or P0382 codes.

[Seanjj]

These codes showed up in the order as follows. PCU 0500,1694,1693. ECU 0234,1693.

[Seanjj]

There is a smaller waste gate boost elbow installed.

[Seanjj]

One morning I had the check engine light stay on but it was gone when

I fired it up again.

[lrhull]

What are the perameters for when the grid heater should come on and off

[lrhull]

Found my answer: http://articles.mopar1973man.com/general-cummins/32-air-system/102-grid-heater

[Mopar1973Man]

These codes showed up in the order as follows. PCU 0500,1694,1693. ECU 0234,1693.

 

http://articles.mopar1973man.com/2nd-generation-24v-dodge-cummins/59-obdii-error-codes/190-p0500-no-vehicle-speed-sensor-signal

 

http://articles.mopar1973man.com/2nd-generation-24v-dodge-cummins/59-obdii-error-codes/232-p1694-no-bus-message-received-from-companion-module

 

http://articles.mopar1973man.com/2nd-generation-24v-dodge-cummins/59-obdii-error-codes/165-p0234-turbo-boost-limit-exceeded

[Seanjj]

The P0234 is probably cause by a heavy foot and the smaller boost elbow. P0500 I heard is from spinning the tires and not really moving, not sure if that's totally true. But with the torque of these truck on icy streets it happens a lot .

[Mopar1973Man]

Some times you get a condition where the rear axle is spinning but the front axle isn't moving then the ABS computer gets confuse and trips the P0500 code because how can half a truck but motionless and the rear half is moving 25 MPH. ABS computer can't compute that.

[Seanjj]

So I took it to the dealer this morning because I wanted them to check and make sure they never set something off. They told me it was my relays and it happens a lot ... I checked for codes as soon as I got back in the truck. Now it says PCU 0500,1694, 1693 and ECU 0382, 1693. Why wouldn't that show up before I gave it to them?

[Mopar1973Man]

Double check your grid heater relay wiring. The trigger wires are just push on type.