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Automotive diagnostics, vehicle evaluations, technical documentation, and corrections to our published training guides.

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For inquiries and manual corrections, use our approved temporary contact: [email protected]. We are preparing the domain-based ATD addresses below. These are proposed names, not yet active. The site will only enable live contact buttons once delivery and reply tests pass.

General inquiries / proposed

[email protected]

Training corrections / proposed

[email protected]

Both can route to one monitored mailbox. Use the temporary Gmail contact until both domain addresses pass inbound and outbound tests.

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ATD INQUIRY
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Technical feedback is welcome.

Report unsafe steps, incorrect pin assignments, unclear diagrams, better sourcing, or topics worth adding. Please identify the edition and page, explain the concern, and include credible support if available.

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ATD will review submitted material before making a revision. Please omit customer-identifying records unless you have explicit permission to disclose them.