Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Output Diagnostic Test Mode (DTM) (function 03): Notes
2001 Audi A6 Avant QuattroSECTION Notes
NOTE:
- Output Diagnostic Test Mode (DTM) is only possible with engine idle and ignition switched on.
- Output Diagnostic Test Mode (DTM) is aborted if engine is started or an RPM signal is recognized.
- In output Diagnostic Test Mode (DTM), individual actuators (with the exception of the fuel injectors) are activated for approximately 1 minute unless the next actuator is selected earlier by pressing the button.
- Actuators are checked either acoustically or by touch.
- The electric Fuel Pump (FP) runs during all of output Diagnostic Test Mode (DTM).
- Engine must be started before repeating output Diagnostic Test Mode (DTM). (ECM must recognize an engine speed of above 300 RPM).
Output Diagnostic Test Mode (DTM) activates the following components in the specified sequence:
OUTPUT DIAGNOSTIC TEST MODE ACTIVATION SEQUENCE
| Activation sequence | |
|---|---|
| 1 | Evaporative Emission (EVAP) canister purge regulator valve -N80- |
| 2 | Secondary Air Injection (AIR) solenoid valve -N112- |
| 3 | Secondary Air Injection (AIR) pump relay -J299- |
| 4 | Intake manifold change -over valve -N156 - |
| 5 | Camshaft adjustment 1 (Valve 1 for camshaft adjustment -N205- and valve 2 for camshaft adjustment -N208-) |
| 6 | Leak Detection Pump (LDP) tank ventilation system |
| 7 | Cylinder 1 fuel injector -N30- |
| 8 | Cylinder 4 fuel injector -N33- |
| 9 | Cylinder 3 fuel injector -N32- |
| 10 | Cylinder 6 fuel injector -N84- |
| 11 | Cylinder 2 fuel injector -N31- |
| 12 | Cylinder 5 fuel injector -N83- |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.