In this video, we demonstrate the process of diagnosing and replacing a faulty evaporative emission system valve in a 2015 Toyota Corolla DDC.
The specific error code we are addressing is P2420, indicating a stuck-off position of the evaporative emission system switching valve.
First, it’s essential to determine whether the issue lies with the wiring or the valve itself. We explain the diagnostic steps to pinpoint the root cause of the problem.
We then proceed to demonstrate the testing of the valve’s functionality using a scan tool to check for power and control signals from the PCM. We emphasize the critical points to consider when conducting these tests to ensure a comprehensive diagnosis.
After confirming that the valve is indeed faulty, we show the process of replacing it with a used valve from a salvage yard, providing a cost-effective alternative to purchasing a new one.
Throughout the video, we emphasize the importance of thorough testing and the significance of each observation in the diagnostic process, ensuring a precise resolution to the issue.
Ultimately, we aim to provide a comprehensive guide for diagnosing and addressing similar issues with the evaporative emission system valves in Toyota Corolla vehicles, promoting efficient and cost-effective solutions to these common problems.
What is the issue with the 2015 Toyota Corolla DDC?
The issue with the 2015 Toyota Corolla DDC is the P2420 code, which indicates a problem with the evaporative emission system, specifically the vacuum switching valve stuck in the off position.
How was the issue diagnosed?
The issue was diagnosed by checking the valve’s control and functionality. The wiring and power supply to the valve were tested, and the valve itself was replaced with a used one to resolve the issue.
What steps were taken to diagnose the valve issue?
The diagnostic process involved testing the power supply, control from the PCM, and the functionality of the valve. Additionally, the wiring diagram was consulted to identify the relevant wires for testing and troubleshooting.
What actions were taken to resolve the issue?
To resolve the issue, the faulty valve was replaced with a used valve obtained from a scrap yard. After replacing the valve, it was tested to ensure proper functionality and resolve the P2420 code.