ECU connector pin diagram

jdejonghe · Aug 10, 2025

Hi, I own a 2006 CRV i-CTDI (gen2), and I have to check the connection of the ECU.
I have a P0602 fault code, which indicates the ECU may not initialize correctly. This problem is intermittent and happens when temperature is high. So I want to check if the ECU is correctly connected, in particular check 12V, ground and others...
Anyone know where to find a diagram of the ECU connector?
Thanks

UK-Kev · Aug 10, 2025

@jdejonghe

Hello and welcome

Attached pdf is the only information I have and relates to the older Honda diesels.
NOTE: Please check the your Bosch ECM has the same serial number before use,

jdejonghe · Aug 11, 2025

Thanks! My ECU is a bosch AG151609050153 but maybe it has the same connectors? On the picture you sent, pins 01, 15, 16 are labelled +12V, do you know if it is permanent 12V or if some are powered only when key is turned? As I have an ECU initializing problem, I think maybe thre is a signal input when key switch is on that is supposed to launch init process, and maybe sometimes this signal is not there...

UK-Kev · Aug 11, 2025

Yes those # PINS require a positive + feed for the ECM to work, so answer to your question is yes.

You say your ECM has a different serial number so may not be the same for yours - Why not contact Bosch Europe Auto and tell them your serial number and ask them for the generic wiring diagram.

ECU connector pin diagram

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