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Home >> Audi >> 1994 >> 90 CS Quattro >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Self-Diagnostic System >> Output Diagnostic Test Mode (DTM)

Output Diagnostic Test Mode (DTM)

NOTE: Perform output DTM with ignition on and engine off. Output DTM will be interrupted if engine is started or if ECM receives an engine speed pulse signal. Before entering output DTM, ensure fuses, circuit breakers and fuel pump relay are okay.

Enter diagnostics. See ENTERING SELF-DIAGNOSTICS. Select function "03", OUTPUT DIAGNOSTIC TEST MODE. Press right arrow button to advance through tests. During tests, check components by listening for noise or feeling component. Components are checked in the following sequence: fuel pump relay, Idle Air Control (IAC) valve, intake manifold change-over (IMCO) valve, EVAP control solenoid valve and EGR control solenoid valve. Before repeating output DTM, turn ignition off for about 20 seconds.

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