Output Diagnostic Test Mode (DTM)
NOTE:
- The output Diagnostic Test Mode (DTM) can be activated only with ignition switched on and the engine not running.
- The output DTM is interrupted if the engine is started, or if a rotary pulse from the ignition system is recognized.
- When operating in the output DTM, the individual output signals are actuated until the program sequence is advanced by pressing the -> button.
- Output signals are checked by listening for the sound of the component being actuated, or feeling for mechanical evidence of actuation, such as clicking, vibration, etc.
- Without letting the engine run, briefly switch the ignition off for approx. 20 seconds before repeating the output checks.
- During the entire output DTM sequence, the electric fuel pump will run.
- The output DTM will be interrupted after 10 minutes.
- Component locations. Locations
The following components are actuated in sequence:
1. Cylinder 1 fuel injector -N30-
2. Cylinder 2 fuel injector -N31-
3. Cylinder 3 fuel injector -N32-
4. Cylinder 4 fuel injector -N33-
5. Cylinder 5 fuel injector -N83-
6. Cylinder 6 fuel injector -N84-
7. EVAP canister purge regulator valve -N80-
8. Secondary AIR solenoid valve -N112-
9. Secondary AIR pump relay -J299-
10. Intake manifold tuning valve -N156- (change-over valve)
11. Camshaft adjustment 1 (Valves -1- and -2- for camshaft adjustment -N205- and -N208-)
Required special tools and testing equipment
- VAG 1551 Scan Tool (ST) with VAG 1551/3 adapter cable
Test conditions
- Fuse for Engine Control Module (ECM) OK
- Closed Throttle Position (CTP) switch -F60- OK
- Fuel pump relay OK
Test sequence
- Connect VAG 1551/VAG 1552 scan tool and insert "Engine Electronics" address word 01 (ignition on).
Indicated on display
Rapid data transfer HELP
Select function XX
- Press buttons -0- and -3- to select "Output Diagnostic Test Mode" function 03.
Indicated on display
Rapid data transfer Q
03 - output Diagnostic Test Mode
Fuel injectors:
- Press -Q- button to confirm input.
Indicated on display
Output Diagnostic Test Mode ->
cylinder 1 Fuel injector-N30
NOTE: The fuel pump relay must be activated, the fuel pump must run, and you must clearly hear the flow of fuel in the fuel pressure regulator. If the fuel pump does not run, check fuel pump relay and connections.
- Operate throttle valve at throttle body.
- As soon as the Closed Throttle Position (CTP) switch opens, cylinder 1 fuel injector must be actuated (click) 5 times.
To check remaining fuel injectors:
- Press -> button and open the throttle valve again.
- As soon as the Closed Throttle Position (CTP) switch opens, the applicable fuel injector must be actuated (click) 5 times.
- Repeat for each fuel injector.
To skip individual tests:
- Press -> button to advance through program sequence
If one or more of the fuel injectors is not actuated:
- Check fuel injectors.
EVAP canister purge regulator valve -N80-:
- Press -> button
Indicated on display
Output Diagnostic TestMode ->
EVAP canister Purge Regulator valve-N6O
The valve will click until pressing the -> button to advance the program sequence.
If the valve is not actuated (does not click):
- Check EVAP canister purge regulator valve.
Secondary Air Injection (AIR) solenoid valve -N112-:
- Press -> button
Indicated on display
Output Diagnostic Test Mode ->
Secondary Air Injection Valve-N112
The valve will click until pressing the -> button to advance the program sequence.
If the valve is not actuated (does not click):
- Check secondary air injection solenoid valve -N112-.
Secondary Air Injection (AIR) pump relay -J299-:
- Press -> button
Indicated on display
Output Diagnostic Test Mode ->
Secondary Air Injection Relay-J299
The relay will be actuated and turn on the secondary AIR pump motor until pressing the -> button to advance the program sequence.
If the relay is not actuated (does not click) or the motor does not run:
- Check secondary air injection pump relay -J299-.
Intake manifold tuning valve -N156- (change-over valve):
- Press -> button
Indicated on display
Output Diagnostic Test Mode ->
Intake Manifold changeover Valve-N156
The valve will click until pressing the -> button to advance the program sequence.
If the valve is not actuated (does not click):
- Check intake manifold tuning valve -N156-. Testing and Inspection
Valves -1- and -2- for camshaft adjustment, -N205-, -N208-:
- Press -> button
Indicated on display
Output Diagnostic Test Mode ->
Camshaft Adjustment 1
Valves 1 and 2 for camshaft adjustment, -N205- and -N208-, are actuated (click) until pressing the -> button to advance the program sequence and end the output DTM.
If one of the valves is not actuated (does not click):
- Check valves for camshaft adjustment.
- Press -> button
Indicated on display
Rapid data transfer HELP
Select function XX
NOTE: Before selecting "Output Diagnostic Test Mode" function 03 again, switch off the ignition for approx. 20 seconds.