No check engine light, no DLC communication

2005 TOYOTA COROLLA
190,000 MILES • 1.3L • 4 CYL • 2WD • AUTOMATIC
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TALAL275
  • MEMBER
  • 2 POSTS
Car listed above has no check engine light, engine cranking but no start.
I checked all the fuses, they are okay, sweped the EFI relay with no luck, also I checked the earth next to the throttle body it's okay.
Thanks for helping me.
Dec 16, 2021 at 12:04 PM
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JACOBANDNICKOLAS
  • Experienced Mechanic
  • 110,240 POSTS
The first thing we need to do is narrow things down. Chances are either spark or fuel has been lost to the engine.

First, take a look through this link. It explains the most common causes of a crank no start condition.

https://www.2carpros.com/articles/car-cranks-but-wont-start

Also, I want you to try something. See if the engine starts if you use starting fluid. If it does and then stalls, we will know its fuel related if there is no change, check for ignition spark. See link below.

https://www.2carpros.com/articles/how-to-test-an-ignition-system

Let me know what you find.

Joe


Dec 16, 2021 at 12:27 PM
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TALAL275
  • MEMBER
  • 2 POSTS
First, I want to thank you for supporting me.
The evap has short circuit and this related to the EFI cause no check engine light came.
That's all.
Many thanks mate.
Dec 16, 2021 at 5:17 PM
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JACOBANDNICKOLAS
  • Experienced Mechanic
  • 110,240 POSTS
Hi,

I highlighted the wiring for the injection system power supply. You mentioned checking the fuel EFI relay. Did you also check the circuit open relay? Are fuses good? Is there power to the black wire with a white tracer to each fuel injector? All should have power with the key on or in the start position.

Pic 1 below shows the power distribution related to the relays. Take a look at it and let me know if the things highlighted have been checked.

Also, if possible, let me know if you have spark to the plugs. The easiest way to check is to simply see if it starts for a few seconds using starting fluid.

Let me know.

Joe
Dec 17, 2021 at 8:22 AM
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