RIP CM2250, 2013, 800,000km 20,000 hrs

[snailexpress]

(06-28-2021 )Hermjeji Wrote:  

(06-27-2021 )snailexpress Wrote:  How ECM is old?

ECM is original - 2013.

(06-27-2021 )snailexpress Wrote:  On diagram is ECM connector and it's not what you have in your hand.

Could you explain this? The diagram showcases a 14 pin connector, that comes from the water-in-fuel sensor. That's what I traced to. This 14pin then splits off and goes to ECM connector A and B.

Is picture with electric diagram from Quickserve? If so the Quickserve will give you generic information about connections.
For example: ECM, OEM connector, pin 24 is connected to WATER IN FUEL SENSOR as SIGNAL.
ECM, OEM connector, pin 26 is return (ground) for WATER IN FUEL sensor.
This is where you need to start troubleshooting harness. From ECM harness plug OEM pin 24 to
sensor pin "signal" - continuity. Same pin to the ground or + 5 v pin - infinity.
ECM plug OEM pin 26 to sensor pin "return" - continuity
14 pin connector you referring for is optional. I don't have it on my Volvo. You have it but numbers of wires different. On other brand it could be 10 pin connector.
If you 100% sure the connector is right check the continuity between sensor and 14 pin plug, from 14 pin plug to ECM OEM connector pins.
All connectors must be disconnected and battery too.