Output Diagnostic Test Mode (DTM)

WARNING: This page is about a different car, the 2006 Audi A4, 2005 Audi A4, 2004 Audi A4, 2003 Audi A4, and 2002 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

The Output Diagnostic Test Mode (DTM) can only be performed with the engine stopped and the ignition switched on.
During actuator diagnosis, the individual actuators (with the exception of the injectors) are operated in turn for about one minute unless the next actuator is selected by pressing the Δ button.
The control elements can be checked acoustically or by way of touch.
The Output Diagnostic Test Mode (DTM) is terminated, if after 1 minute actuation time the next control element is not switched to, or the engine is started or an engine speed pulse is detected.
Before restarting the Output Diagnostic Test Mode (DTM) the engine must be started and the ignition switched off and on again.

The Output Diagnostic Test Mode (DTM) activates the following components in the stated order:

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	Wastegate Bypass Regulator Valve -N75-
5	Camshaft timing control
6	Leak Detection Pump (LDP) -V144-
7	Recirculating valve for turbocharger -N249-
8	Activate brake vacuum pump 1)
9	Coolant Fan Control 1 -J293-
10	Fuel injector, cylinder 1 -N30-
11	Fuel injector, cylinder 3 -N32-
12	Fuel injector, cylinder 4 -N33-
13	Fuel injector, cylinder 2 -N31-

1) Only on vehicles with automatic transmission.

Requirements

Fuses for engine electronics OK

Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations

Work sequence

Connect vehicle diagnostic, testing and information system VAS 5051 and select vehicle system "01 - Engine electronics" in selection list. Ignition must be switched on.

Fig 1: Diagnostic System VAS 5051: Display

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Display on VAS 5051:

Under -1- select diagnostic function "03 - Output Diagnostic Test Mode (DTM)".

Activating Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80-

Fig 2: Display On VAS 5051 - (1st Control Element In Test & Evaporative Emission (EVAP) Canister Purge Regulator Valve-N80-)

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Display on VAS 5051:

A - control element test running advance necessary

1 - Evaporative Emission (EVAP) Canister Purge Regulator -N80-

Press Δ button.

Display on VAS 5051:

A - control element test running advance permitted

This valve is activated (clicks) for approx. 1 minute if the operation is not switched to the next control element by pressing the Δ button.

NOTE: Fuel pump must run during actuation time, the flow noise at fuel pressure regulator must be clearly audible If fuel pump does not run, check activation:

Refer to 20 - FUEL SUPPLY SYSTEM

If the valve is not activated (does not click).

Check Evaporative Emission (EVAP) Canister Purge Regulator -N80-. Refer to Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80-, checking .

Activating Secondary Air Injection (AIR) solenoid valve -N112-

Press Δ button.

Fig 3: Display On VAS 5051 - (2nd Control Element In Test & Secondary Air Injection (AIR) Solenoid Valve -N112-)

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Display on VAS 5051:

A - control element test waiting advance necessary

2 - Secondary Air Injection (AIR) Solenoid Valve -N112-

Press Δ button.

Display on VAS 5051:

A - control element test running advance permitted

Fig 4: Identifying Secondary Air Injection (AIR) Solenoid Valve -N112-

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This valve (-Pos. 2- under intake manifold) is activated (clicks) for approx. 1 minute if the operation is not switched to the next control element by pressing the Δ button.

NOTE: The fuel pump must run during the activation time.

If the valve is not activated (does not click).

Check Secondary Air Injection (AIR) Solenoid Valve -N112-:

Refer to 26 - EXHAUST SYSTEM, EMISSION CONTROLS

Activating Secondary Air Injection (AIR) Pump Relay -J299-

Press Δ button.

Fig 5: Display On VAS 5051 - (3rd Control Element In Test & Secondary Air Pump Relay -J299-)

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Display on VAS 5051:

A - control element test running advance permitted

3 - Secondary Air Injection (AIR) Pump Relay -J299-

Press Δ button.

Display on VAS 5051:

A - control element test running advance permitted

Fig 6: Component Location For Secondary Air Injection (AIR) Pump Relay J299

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The Secondary Air Injection (AIR) Pump Relay -J299- (in relay carrier in electronics box, plenum chamber, position 3) switches the engine for the Secondary Air Injection (AIR) Pump Motor -V101- on and off at approx. 1 minute intervals if the operation has not been switched to the next control element by pressing the Δ button.

NOTE: The fuel pump must run during the activation time.

If secondary air pump does not run intermittently:

Check Secondary Air Injection (AIR) Pump Relay -J299-:

Refer to 26 - EXHAUST SYSTEM, EMISSION CONTROLS

Activating Wastegate Bypass Regulator Valve -N75-

Press Δ button.

Fig 7: Display On VAS 5051 - (4th Control Element In Test & Charge Pressure Control Valve -N75)

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Display on VAS 5051:

A - control element test running advance permitted

4 - Wastegate Bypass Regulator Valve -N75-

Press Δ button.

Display on VAS 5051:

A - control element test running advance permitted

This valve is activated (clicks) for approx. 1 minute if the operation is not switched to the next control element by pressing the Δ button.

NOTE: The fuel pump must run during the activation time.

If the valve is not activated (does not click).

Refer to 21 - TURBOCHARGER, G-CHARGER

Activating camshaft adjustment valves

Press Δ button.

Fig 8: Display On VAS 5051 - (4th Control Element In Test & Charge Pressure Control Valve -N75)

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Display on VAS 5051:

A - control element test waiting advance necessary

5 - Camshaft timing control

Press Δ button.

Display on VAS 5051:

A - control element test running advance permitted

This valve is activated (clicks) for approx. 1 minute if the operation is not switched to the next control element by pressing the Δ button.

NOTE: The fuel pump must run during the activation time.

If the valve is not activated (does not click).

Check camshaft adjustment valves:

Refer to 15 - ENGINE - CYLINDER HEAD, VALVETRAIN

Activating Leak Detection Pump (LDP) -V144-

Press Δ -button.

Fig 9: Display On VAS 5051 - (Actuator In Test & Leak Detection Pump Tank Ventilation System)

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Display on VAS 5051:

A - control element test waiting advance necessary

6 - Leak Detection Pump (LDP) -V144- tank ventilation system

Press Δ -button again.

Display on VAS 5051:

A - control element test running advance permitted

Leak Detection Pump (LDP) -V144- is activated (clicks) in intervals for approx. 1 minute, unless the Δ -button is pressed to switch to the next actuator.

NOTE: Operating noise of Leak Detection Pump (LDP) is softly audible at left rear wheelhouse.

If Leak Detection Pump (LDP) for tank ventilation system is not activated (no operating noise is audible):

Check Leak Detection Pump (LDP) for tank ventilation system:

Refer to 20 - FUEL SUPPLY SYSTEM

Activating Recirculating valve for turbocharger -N249-

Press Δ button.

Fig 10: Display On VAS 5051 - (7th Control Element In Test & Recirculating Valve For Turbocharger -N249-)

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Display on VAS 5051:

A - control element test waiting advance necessary

7 - Recirculating valve for turbocharger -N249-

Press Δ button.

Display on VAS 5051:

A - control element test running advance permitted

Fig 11: Identifying Secondary Air Injection (AIR) Solenoid Valve -N112-

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This valve (-Pos. 1- under intake manifold) is activated (clicks) for approx. 1 minute if the operation is not switched to the next control element by pressing the Δ button.

NOTE: The fuel pump must run during the activation time.

If the valve is not activated (does not click).

Refer to 21 - TURBOCHARGER, G-CHARGER

Activating brake vacuum pump 1)

1) Only on vehicles with automatic transmission.

Press Δ button.

Fig 12: Display On VAS 5051 - (Activation Of Brake System Vacuum Pump)

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Display on VAS 5051:

A - Control element test waiting advance necessary

8 - Activation of brake vacuum pump

Press Δ button.

Display on VAS 5051:

A - control element test running advance permitted

The brake servo vacuum pump, front left in engine compartment, must start up for a short time, unless the operation has been switched to the next control element by pressing the Δ button.

If the brake servo vacuum pump does not start up:

Check brake servo vacuum pump:

Refer to 47 - BRAKES - HYDRAULIC COMPONENTS

Activating Coolant Fan Control (FC) control module -J293-

Press Δ button.

Fig 13: Display On VAS 5051 - (9th Control Element In Test & Injector - Cyl. 1 -N30-)

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Display on VAS 5051:

A - control element test waiting advance necessary

9 - Coolant Fan activation

Press Δ button.

Display on VAS 5051:

A - control element test running advance permitted

Fig 14: Identifying Coolant Fan Control 1 -J293-

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The Coolant Fan Control 1 -J293- (top right on radiator cowl -arrow-) switches the coolant fan on once slowly to full speed, if the operation has not been switched to the next control element by pressing the Δ button.

NOTE: The fuel pump must run during the actuation time.

If the fan does not start:

Check coolant fan and Coolant Fan Control 1 -J293-.

Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations

Activating fuel injectors

NOTE: Fuel injectors are activated according to ignition sequence: Cyl. 1, Cyl. 3, Cyl 4, Cyl. 2.

Press Δ button

Fig 15: Display On VAS 5051 - (Cylinder 1 Fuel Injector -N30-)

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Display on VAS 5051:

A - control element test waiting advance necessary

10 - Cylinder 1 fuel injector -N30-

Press Δ button again.

Display on VAS 5051:

A - control element test running advance permitted

Fuel injector must click 5 times after Δ button is pressed.

NOTE: Fuel pump must run during activation time.

Press Δ button

Fig 16: Display On VAS 5051 - (11th Control Element In Test & Injector - Cyl. 4 -N33-)

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Display on VAS 5051:

A - control element test waiting advance necessary

11 - Cylinder 3 Fuel Injector -N32-

Press Δ button again.

Display on VAS 5051:

A - control element test running advance permitted

Fuel injector must click 5 times after Δ button is pressed.

NOTE: Fuel pump must run during activation time.

Press Δ button

Fig 17: Display On VAS 5051 - (12th Control Element In Test & Injector - Cyl. 2 -N31-)

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Display on VAS 5051:

A - control element test waiting advance necessary

12 - Cylinder 4 Fuel Injector -N33-

Press Δ button again.

Display on VAS 5051:

A - control element test running advance permitted

Fuel injector must click 5 times after Δ button is pressed.

NOTE: Fuel pump must run during activation time.

Press Δ button

Fig 18: Display On VAS 5051 - (13th Cylinder 2 Fuel Injector -N31-)

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Display on VAS 5051:

A - control element test waiting advance necessary

13 - Cylinder 2 Fuel Injector -N31-

Press Δ button again.

Display on VAS 5051:

A - control element test running advance permitted

Fuel injector must click 5 times after Δ button is pressed.

NOTE: Fuel pump must run during activation time.

If one of the fuel injectors is not activated (does not click).

Check fuel injectors. Refer to Fuel injectors, checking .
Press Δ button

Fig 19: Display On VAS 5051 - (Output Diagnostic Test Mode Is Completed)

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Display on VAS 5051:

A - Actuator test has ended

End function "03 - output Diagnostic Test Mode (DTM)" by pressing ← button.

NOTE: Before re-initiating output Diagnostic Test Mode (DTM), engine must be started and the ignition must be switched off and on again.