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Hi, on my 407sw 2.0hdi the esc & abs warning lights both came on, fault codes that would not clear were c1300 & c1320. The latter being left front wheel sensor that I have replaced & the abs light has gone out, but esc warning is still on. Fault code c1300 is pressure sensor supply. I know that the pressure sensor is in the pump, but before I go to the trouble of replacing the pump can I check the wiring to the sensor in any way? I already have a second hand pump & have tried swapping the ecu over, but made no difference!
 

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I suppose you mean more than just continuity.

You can check abs sensor by sticking a meter in it and seeing the voltage spike.

If you have a suitable wiring diagram could you probe it at whatever module it goes into and see the same voltage spike, maybe, never did this before myself, but i guess it would work.
 

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Discussion Starter #3
Already replaced the abs sensor, it's the pressure sensor I would like to know if there is anyway to check the wiring?
 
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