ECU

Tiny
EMMAYO
  • MEMBER
  • 2002 HONDA CRV
I took a honda crv for scanning. The scanner could not connect to the ecu but could scan the abs and srs systems. Pls whats the next step to take
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Tuesday, July 19th, 2011 AT 1:47 AM

8 Replies

Tiny
DANLESABRE
  • MEMBER
Check the fuses
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Tuesday, July 19th, 2011 AT 4:24 AM
Tiny
EMMAYO
  • MEMBER
Could it be that the ecu needs to be replaced. How is it related with the fuses
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Tuesday, July 19th, 2011 AT 9:12 AM
Tiny
KHLOW2008
  • EXPERT
You could have a bad ECU or wiring between the DLC and the ECU.

Try using a different scan tool to see if it works.

Fuses provides power supply to the ECU amnd DLC, so if you have a power supply fault, the scan tool would not work.
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Tuesday, July 19th, 2011 AT 1:43 PM
Tiny
EMMAYO
  • MEMBER
Thank you all.
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Tuesday, July 19th, 2011 AT 4:52 PM
Tiny
ASEMASTER6371
  • EXPERT
It sounds like there is a conflict on the communication bus. If one or more computers cannot communicate with each other, you need to disconnect one at a time till you can communicate. This is best donen by a shop that is expierenced with this diag.

Roy
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Tuesday, July 19th, 2011 AT 6:33 PM
Tiny
EMMAYO
  • MEMBER
@ASEMaster. Disconnect what from what?
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Tuesday, July 19th, 2011 AT 9:51 PM
Tiny
ASEMASTER6371
  • EXPERT
You have around 5 or 6 computers in your car. These control units all talk to each other and when one cant talk, a communication error starts. It is hard to say which one being as I cannot touch the car. Locating each unit and disconnecting the power will disable it and thats how you do it. At the aldl connector, there should be a certain voltage on the communication bus line. It needs to be checked as each unit is disconnected.
This is why I said you are better off letting a shop help you as they have the expierence with these diags.

Roy
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Tuesday, July 19th, 2011 AT 10:01 PM
Tiny
EMMAYO
  • MEMBER
Thanks
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Wednesday, July 20th, 2011 AT 10:37 AM

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