D4164T - How to decipher ECM(ECU) pinout ?

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D4164T How to decipher ECM(ECU) pinout ?

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How to decipher ECM(ECU) pinout ?

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Apr 23rd, 2021, 23:03

cadrjr

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Last Online: Aug 24th, 2021 20:48

Join Date: Aug 2020

Location: dublin

How to decipher ECM(ECU) pinout ?

I am debugging an EGR problem with my '07 V50 1.6 diesel.
I first cleaned the EGR, then I replaced the EGR - to no avail.

Looking into this problem more deeply ,I have ascertained that the sensor part of the EGR Value works fine, but I have scoped the PWM drive to the EGR motor and there is nothing there.

So, I guess either there is a wiring fault between the EGR Valve and the ECM
or the ECM itself is defective (blown EGR motor driver).

I'm trying to trace the wires from EGR Valve to ECM.
I attach the relevant part of Volvo wiring diagram.
The 2 ECM pins I'm interested in are labelled B:15 and B:16.
What I need to know is how to find these on the ECM Connector. The Volvo wiring diagrams don't list the ECM pinout as far as I can see and Volvo do not seem to use the standard Bosch pin numbering.

EGR_wiring.png

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ECU_CONNECTOR_lFloiYj.jpg (251.6 KB, 8 views)

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