No check engine light, no DLC communication

Tiny
TALAL275
  • MEMBER
  • 2005 TOYOTA COROLLA
  • 1.3L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 190,000 MILES
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.
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Thursday, December 16th, 2021 AT 8:04 PM

3 Replies

Tiny
JOE F
  • EXPERT
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

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Thursday, December 16th, 2021 AT 8:27 PM
Tiny
TALAL275
  • MEMBER
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.
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Friday, December 17th, 2021 AT 1:17 AM
Tiny
JOE F
  • EXPERT
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
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Friday, December 17th, 2021 AT 4:22 PM

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