No power getting to the fuel pump relay?

Tiny
ANDRIN ATEM
  • MEMBER
  • 2005 HYUNDAI TUCSON
  • 2.2L
  • 4 CYL
  • TURBO
  • 4WD
  • AUTOMATIC
  • 17,654 MILES
Please this is a diesel engine, please can you provide me with any instructions relating to ECU signals for the fuel pump, also power and ground for the ECU terminal. Diagrams for power and ground.
Friday, April 4th, 2025 AT 10:53 AM

4 Replies

Tiny
STEVE W.
  • MECHANIC
  • 15,233 POSTS
The attached are the pump relay and the ECM connector as well as the control info. This truck was sold in the US but we never got the diesel version. As such our service information doesn't really cover it.
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Saturday, April 5th, 2025 AT 1:24 AM
Tiny
ANDRIN ATEM
  • MEMBER
  • 397 POSTS
Well after scanning the car, I noticed a lot of U0 codes, if by some means you can sort out and send to me the Can High and Can low diagram, and the block diagrams for the modules, I can solve this problem.
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Sunday, April 6th, 2025 AT 6:33 AM
Tiny
STEVE W.
  • MECHANIC
  • 15,233 POSTS
These are the data lines for the US version, they should be close to the one you have. The OE doesn't list them like this. However, a U0 just means the modules are not talking. That could be as simple as a failed ECU or one of them shorted the network.
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Sunday, April 6th, 2025 AT 2:31 PM
Tiny
ANDRIN ATEM
  • MEMBER
  • 397 POSTS
Thank you Ken.
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Sunday, April 6th, 2025 AT 3:09 PM

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