Output Diagnostic Test Mode (DTM)
Output Diagnostic Test Mode (DTM) (Function 03)
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:
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-
Test Requirement:
- Fuses for engine electronics OK
Test Sequence
- Connect VAS5O51 tester or VAG1551 scan tool and select the control module for engine electronics using "address word" 01. [1][2]Scan Tool Connecting and Initial Checks
Ignition must remain switched on for this.
When indicated on display:
Rapid data transfer HELP
Select function XX
- Press buttons -0- and -3- to select "output Diagnostic Test Mode" and press -Q- button to confirm input.
Indicated on display:
Rapid data transfer Q
03 - Output Diagnostic Test Mode
Activating the EVAP canister purge regulator valve (tank vent valve)
- Confirm input using the -Q- button.
NOTE: The Fuel Pump (FP) relay must trigger, the Fuel Pump (FP) must run, flowing noise at fuel pressure regulator is clearly audible. If Fuel Pump (FP) does not run, check activation. Testing and Inspection
Indicated on display:
Output Diagnostic Test Mode ->
EVAP canister purge regulator valve -N80
(Indicated on VAG1551: from EVAP canister purge regulator valve -N80-)
This valve is activated for approx. 1 minute (clicks), unless -> - button is pressed first to switch to the next actuator.
If valve is not activated (does not click):
- Check Evaporative Emission (EVAP) canister purge regulator valve -N80-. Testing and Inspection
Activating the Secondary Air Injection (AIR) solenoid valve
- Press -> button.
Indicated on display:
Output Diagnostic Test Mode ->
Secondary air injection solenoid valve -N112
This valve is activated for approx 1 minute (clicks), unless - button is pressed first to switch to the next actuator.
If valve is not activated (does not click):
- Check Secondary Air Injection (AIR) solenoid valve -N112-.
Activating the Secondary Air Injection (AIR) pump relay
- Press -> button.
Indicated on display:
Output Diagnostic Test Mode ->
Secondary air injection pump relay -J299
The Secondary Air Injection (AIR) pump relay -J299- (in 3-socket relay carrier in the E-box, at left in the plenum chamber, position 2) switches the Secondary Air Injection (AIR) pump motor -V101- on for approx. 1 minute in intervals unless the next actuator is selected first by pressing the button.
If the Secondary Air Injection (AIR) pump motor -V101- does not run in intervals:
- Check Secondary Air Injection (AIR) pump relay -J299-:
Activating intake manifold changeover valve
- Press -> button.
Indicated on display:
Output Diagnostic Test Mode ->
Intake manifold changeover valve -N156
This valve is activated for approx. 1 minute (clicks), unless -> - button is pressed first to switch to the next actuator.
If valve is not activated (does not click):
- Check intake manifold change-over valve -N156-. Refer to "Intake Manifold Change-Over Valve -N156- Checking", Testing and Inspection
Activating camshaft adjustment valves
- Press -> button.
Indicated on display:
Output Diagnostic Test Mode ->
Camshaft adjustment 1
Valve -1- for camshaft adjustment -N205- and valve -2- for camshaft adjustment -N208- are activated for approximately 1 minute (they click) unless output Diagnostic Test Mode (DTM) is ended first by pressing the" button
If valves are not activated (do not click).
- Check camshaft adjustment valves:
Activating Leak Detection Pump (diagnostic pump for tank ventilation system)
- Press -> button.
Indicated on display:
Output Diagnostic Test Mode ->
Leak detection pump Tank vent valve system
The change-over valve in the LDP is activated for approximately 1 minute (clicks), unless button is pressed first to switch to the next actuator.
NOTE: The click can be heard by listening near the rear left wheelhousing.
If valve is not activated (does not click):
Activating fuel injectors
NOTE: Fuel injectors are activated according to ignition sequence: Cyl. 1, Cyl. 4, Cyl. 3, Cyl 6, Cyl. 2, Cyl 5.
- Press -> button.
Indicated on display:
Output Diagnostic Test Mode ->
Cyl. 1 fuel injector -N30
- Press -> button.
Indicated on display:
Output Diagnostic Test Mode ->
Cyl. 1 fuel Injector -N30
Fuel injector must click 5 times after arrow button is pressed.
If injector does not click:
- Check fuel injectors. Refer to "Fuel Injectors, Checking", Testing and Inspection
- Press -> button.
Indicated on display:
Output Diagnostic Test Mode ->
Cyl. 4 fuel injector -N33
- Press -> button.
Indicated on display:
Output Diagnostic Test Mode ->
Cyl. 4 fuel injector -N33
Fuel injector must click 5 times after arrow button is pressed.
If injector does not click:
- Check fuel injectors. Refer to "Fuel Injectors, Checking", Testing and Inspection
- Press -> button.
Indicated on display:
Output Diagnostic Test Mode ->
Cyl. 3 fuel injector -N32
- Press -> button.
Indicated on display:
Output Diagnostic Test Mode ->
Cyl. 3 fuel injector -N32
Fuel injector must click 5 times after arrow button is pressed.
If injector does not click:
- Check fuel injectors. Refer to "Fuel Injectors, Checking", Testing and Inspection
- Press -> button.
Indicated on display:
Output Diagnostic Test Mode ->
Cyl. 8 fuel injector -N84
- Press -> button.
Indicated on display:
Output Diagnostic Test Mode ->
Cyl. 8 fuel injector -N84
Fuel injector must click 5 times after arrow button is pressed.
If injector does not click:
- Check fuel injectors. Refer to "Fuel Injectors, Checking", Testing and Inspection
- Press -> button.
Indicated on display:
Output Diagnostic Test Mode ->
Cyl. 2 fuel injector -N31
- Press -> button.
Indicated on display:
Output Diagnostic Test Mode ->
Cyl. 2 fuel injector -N31
Fuel injector must click 5 times after arrow button is pressed.
If injector does not click:
- Check fuel injectors. Refer to "Fuel Injectors, Checking", Testing and Inspection
- Press -> button.
Indicated on display:
Output Diagnostic Test Mode ->
Cyl. 5 fuel injector -N83
- Press -> button.
Indicated on display:
Output Diagnostic Test Mode ->
Cyl. 5 fuel injector -N83
Fuel injector must click 5 times after arrow button is pressed.
If injector does not click:
- Check fuel injectors. Refer to "Fuel Injectors, Checking", Testing and Inspection
Indicated on display:
Output Diagnostic Test Mode ->
END
- Press -> button.
Indicated on display (function selection):
Rapid data transfer HELP
Select function XX
NOTE: Before re-initiating output Diagnostic Test Mode (DTM), engine must be started and the ignition must be switched off and on again.