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Using ASD Technique to troubleshoot your Apple Mac


By:  Arshad Jackie  /  On:  Aug 28, 2019




Apple Service Diagnostic, or ASD for short, is Apple’s in-house diagnostic tool used by technicians to isolate and fix hardware issues. This isn’t a one-size fits all operation. Each Mac, or “family” of Mac computers, will have its own ASD release. To test a MacBook Air from 2013, you’ll need the ASD release that accompanied that specific hardware configuration. Newer post-2015 Mac models use a completely different system, which runs via the internet and requires a login.





How to use Apple Diagnostics
Disconnect all external devices except keyboard, mouse, display, Ethernet connection (if applicable), and connection to AC power.
2. Make sure that your Mac is on a hard, flat, stable surface with good ventilation.

3. Shut down your Mac.

4. Turn on your Mac, then immediately press and hold the D key on your keyboard. Keep holding until you see a screen asking you to choose your language. When Apple Diagnostics knows your language, it displays a progress bar indicating that it’s checking your Mac:

5. Checking your Mac takes 2 or 3 minutes. If any issues are found, Apple Diagnostics suggests solutions and provides reference codes. Note the reference codes before continuing.

6. Choose from these options:To repeat the test, click ”Run the test again” or press Command (⌘)-R.
For more information, including details about your service and support options, click ”Get started” or press Command-G.

7. To restart your Mac, click Restart or press R.
To shut down, click Shut Down or press S.





ASD Codes
ADP000 – No problems found on the computer.

CNW001, CNW003, CNW004, CNW005, CNW006 – There are problems with the Wi-Fi module on the computer.

CNW007, CNW008 – No Wi-Fi networks detected. Available Wi-Fi networks are missing, or the Wi-Fi module is defective;

NDC001, NDC003, NDC004, NDC005, NDC006 – The camera is defective.

NDD001 – There is a problem with the USB module. Disconnect all external devices except the keyboard, mouse, and Ethernet adapter. Run the test again. If this code appears again, Contact Our Service Center

NDK001, NDK003, NDK004 – There is a problem with the keyboard;

NDL001 – There is a problem with the Bluetooth module;

NDR001, NDR003, NDR004 – There is a problem with the trackpad;

NDT001, NDT002, NDT003, NDT004, NDT005, NDT006 – There may be a problem with the Thunderbolt module. Disconnect external Thunderbolt devices and run the test again. If this code appears a second time, contact the service center.

NNN001 – The serial number could not be found. The computer needs maintenance, contact the service;

PFM001, PFM002, PFM003, PFM004, PFM005, PFM006, PFM007 – There is a problem with the System Management Controller (SMC);

PFR001 – There may be a problem with the firmware of the computer;

PPF001, PPF003, PPF004 – There may be a problem with the fan;

PPM001 – There is probably a problem with the memory module;

PPM002, PPM003, PPM004, PPM005, PPM006, PPM007, PPM008, PPM009, PPM010, PPM011, PPM012, PPM013, PPM014, PPM015 – There may be a problem with the built-in memory;

PPP001, PPP002, PPP003 – There is probably a problem with the MagSafe power adapter. Try unplugging the power adapter from the Mac and the outlet, then reconnecting it again. Run the test again. If this code appears a second time, contact the service centre;

PPP007 – There may be a problem with the power adapter, or it is not connected. To check the power adapter, reconnect it to the computer and the outlet. Run the test again. If this code appears a second time, contact the service center.

PPR001 – There is probably a problem with the processor;

PPT001 – The battery could not be detected;

PPT002, PPT003 – The battery needs to be replaced soon. It is functional, but its capacity has decreased.

PPT004, PPT006 – The battery needs maintenance. The battery is defective, although this may not affect its performance or capacity;

PPT005 – The battery is not installed correctly. Shut down and shut down the computer;

PPT007 – The battery on the Mac needs to be replaced. The battery is functional, but its capacity has been significantly reduced. Before replacing the battery, you can continue to use it without harming the computer.

VDC001, VDC003, VDC004, VDC005, VDC006, VDC007 – Probably, there is a problem with the SD card reader;

VDH002, VDH004 – There is probably a problem with the storage device;

VDH005 – Unable to start recovery of macOS;

VFD001, VFD002, VFD003, VFD004, VFD005, VFD007 – There is probably a problem with the display;

VFD006 – There is probably a problem with the graphics processor;

VFF001 – There is probably a problem with the audio hardware component.







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