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No start and communication to ECU

Tiny
RICHARD'S
  • MEMBER
  • 2008 CHEVROLET CAPTIVA
  • 2.4L
  • 4 CYL
  • 4WD
  • 20,000 MILES
I have the vehicle listed above with a z23sed engine. What happened is that when you turn the ignition key to on it turn on but the gauges are not moving throttle body is not responding and fuel pump is not responding. All instruments are working but on side of engine fuse on a fuse block there is no power.I have diagnose it but I didn't have an access on engine side of a car. Can I be help?
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Saturday, December 7th, 2019 AT 9:29 AM

9 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,513 POSTS
Hello,

There is a powertrain relay #47 that needs to be checked. here is guide to help and the relay location in the diagrams below:

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Check out the diagrams (below). Please let us know what happens.
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Sunday, December 8th, 2019 AT 5:19 PM
Tiny
RICHARD'S
  • MEMBER
  • 6 POSTS
Good day Ken,

I have receive your advice but my Fuse box is different to the one you sent. Now I can't find the relay you advance about. I have sent you how my fuse box looks like.
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Friday, December 13th, 2019 AT 2:44 AM
Tiny
RICHARD'S
  • MEMBER
  • 6 POSTS
I tried to send you a photo of how my fuse box looks like but your reply box doesn't give me the option to attach photos.
I am trying to locate the relay based on the diagram you sent me but I can't find it because the fuse box on the diagram is very different to my fuse box.
May you please double check the exact model written above on my first question and send me the diagram of the exact model so that I can be able to locate the relay.
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Friday, December 13th, 2019 AT 3:08 AM
Tiny
RICHARD'S
  • MEMBER
  • 6 POSTS
Or maybe the model might consist of different fuse boxes, if that's the case please send me all the options.
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Friday, December 13th, 2019 AT 3:11 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,513 POSTS
There should be a link below the text box that is for uploading pictures and videos do you see it? I found this for the engine control relay let me know.
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Friday, December 13th, 2019 AT 11:29 AM
Tiny
RICHARD'S
  • MEMBER
  • 6 POSTS
There's no link for photos and videos, there's a textbox only.
I noticed I cannot reply to you via email, can you maybe provide a link where I can upload photos or an email where I can send photos please? My fuse box is very different to the diagrams I'm struggling to locate the relays that you mentioned.

The only relays I find namely: Main relay, starter relay, fan aux relay, fuel relay, fan main relay, fan control relay, horn relay, wiper speed relay, run relay, defrog relay, park LP relay, FRT fog relay, H/L LO relay, HL/HI relay, and H/L washer relay.

Could they be using a different name on my diagram maybe?
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Sunday, December 15th, 2019 AT 1:13 AM
Tiny
KEN L
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Hmm, what browser or phone are you using? The main relay would be the one to test.
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Monday, December 16th, 2019 AT 12:33 PM
Tiny
RICHARD'S
  • MEMBER
  • 6 POSTS
I'm using opera mini, Samsung.
I checked all the relays, and all the fuses, they all seem to be okay.
The only fuse that doesn't have power on both sides is anti theft, When the car is on, the dash board flashes a key lock and a spanner sign, and it doesn't turn off, what could be the cause of that?
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Tuesday, December 17th, 2019 AT 6:12 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,513 POSTS
It sounds like the browser is not showing the link for some reason. I will have your tech guy look at it. The wrench sign is telling us there is a code. lets run the computer to see what comes up. here is a guide:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Please run down this guide and report back.

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Tuesday, December 17th, 2019 AT 11:58 AM

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