Output Diagnostic Test Mode (DTM)
Output Diagnostic Test Mode (DTM)
NOTE:
- The DTM can only be performed with the ignition switched on and the engine not running.
- The DTM is terminated if the engine is started or if an engine speed pulse is detected.
- During the DTM, individual control elements will be activated for approx. 1 minute, or until the test program is advanced to the next control element by pressing the button.
- The control elements can be tested either by listening or by touching.
- If the DTM is to be repeated, the engine must be started. The engine control module needs to detect an engine speed of more than 300 rpm.
- The electric fuel pump runs continuously throughout the DTM.
- For vehicles with automatic/continuous transmission, an electrical vacuum pump sets in to support engine vacuum creation for brake booster.
- This vacuum pump is activated by the Engine Control Module (ECM) via a relay, if it is necessary.
- Activation of the relay (and therefore also for vacuum pump) can be checked via output Diagnostic Test Mode (DTM).
Relay activation:
- Relay activation (approx.10 seconds) is ensured after activation of the recirculating valve for turbocharger -N249-.
Activation sequence
1 EVAP Canister Purge Regulator Valve - N80-
2 Secondary Air Injection (AIR) Solenoid Valve -N112- (This display appears only on vehicles with automatic transmission)
3 Secondary Air Injection (AIR) Pump Relay -J299-
(This display appears only on vehicles with automatic transmission)
4 Wastegate Bypass Regulator Valve -N75
5 Camshaft adjustment
6 Leak Detection Pump for EVAP system
7 Recirculating valve for turbocharger -N249
8 Cylinder 1 Fuel Injector -N30
9 Cylinder 4 Fuel Injector -N33
10 Cylinder 3 Fuel Injector -N32
11 Cylinder 6 Fuel Injector -N84
12 Cylinder 2 Fuel Injector -N31
13 Cylinder 5 Fuel Injector -N83
Test requirements
- Fuses for engine electronics OK
- Fuel pump relay OK
- Connect vehicle diagnostic, testing and information system VAS5051 or VAG1551 scan tool and select engine electronics control module by entering address word "01". When doing this the ignition must be switched on. Connecting VAS 5051 Scan Tool
Indicated on display
Rapid data transfer HELP
Select function XX
- Press buttons -0- and -3- to select function "Output Diagnostic Test Mode."
Indicated on display
Rapid data transfer Q
03 - Output Diagnostic Test Mode
Actuating EVAP Canister Purge Regulator Valve -N80
- Confirm input with -Q- button. Indicated on display
Output Diagnostic Test Mode ->
EVAP canister purge regulator valve -N80
This solenoid valve will continue to be actuated (i.e. will click) until the button is pressed to advance program to next control element.
If the solenoid valve is not actuated (does not click):
- Check EVAP Canister Purge Regulator Valve -N80. Testing and Inspection
Actuating Secondary Air Injection (AIR) Solenoid Valve -N112
NOTE:
Only vehicles with automatic transmission are equipped with a secondary air injection system. Vehicles with manual transmission do not have a secondary air injection system For this reason are on vehicles with manual transmission the following components
Secondary Air Injection (AIR) Solenoid Valve - N112 and Secondary Air Injection (AIR) Rump Relay -J299 not displayed.
- Press -> button.
Indicated on display
Output Diagnostic Test Mode ->
Secondary Air Injection (AIR) Solenoid Valve -N112.
This solenoid valve will continue to be actuated (i.e. will click) until the button is pressed to advance the program to the next control element.
If the secondary air injection valve does not click:
- Check Secondary Air Injection (AIR) Solenoid Valve -N112
Actuating Secondary Air Injection (AIR) Pump Relay -J299
NOTE: Only vehicles with automatic transmission are equipped with a secondary air injection system. Vehicles with manual transmission do not have a secondary air injection system. For this reason is on vehicles with manual transmission the following component Secondary Air Injection (AIR) Pump Relay -J299 not displayed.
- Press -> button.
Indicated on display
Output Diagnostic Test Mode ->
Secondary air pump relay -J299
The Secondary Air Injection (AIR) Pump Relay -J299- activates the Secondary Air Injection (AIR) Pump Motor -V101-, which runs for approx.:1 minute at intervals.
If the Secondary Air Injection (AIR) Pump Motor -V101- does not run at intervals:
- Check Secondary Air Injection (AIR) Pump Relay -J299.
Activating Wastegate Bypass Regulator Valve -N75-
- Press -> button.
Indicated on display
Output Diagnostic Test Mode ->
Wastegate bypass regulator valve -N75
This solenoid valve is activated for 1 minute (clicks), unless -> button is pressed first to switch to the next actuator.
If valve is not activated (does not click):
Actuating camshaft adjustment valves -N205-,-N208-
- Press -> button.
Indicated on display
Output Diagnostic Test Mode ->
Wastegate bypass regulator valve -N75
This solenoid valve is activated for 1 minute (clicks), unless -> button is pressed first to switch to the next actuator.
If valve is not activated (does not click):
Actuating Leak Detection Pump (LDP) -V144-
- Press -> button.
Indicated on display
Output Diagnostic Test Mode ->
EVAP system leak detection pump
The change over valve in the LDP is activated for approximately 1 minute (clicks) unless the button pressed to switch to the next actuator.
NOTE: The clicking can be heard by listening in the area of the left rear wheel housing.
If valve is not actuated (does not click):
Activating Recirculating valve for turbocharger -N249
- Press -> button.
Indicated on display
Output Diagnostic Test Mode ->
Recirculating valve for turbocharger -N249
This solenoid valve is activated for 1 minute (clicks), unless button is pressed first to switch to the next actuator.
If valve is not activated (does not click):
Actuating fuel injectors
NOTE: The fuel injectors are activated in firing order that means Cyl.1, Cyl.4, Cyl.3, Cyl.6, Cyl.2, Cyl,5
- Press -> button.
Indicated on display
Output Diagnostic Test Mode ->
Cylinder 1 fuel injectors -N30
- Press -> button.
After pressing -> button, fuel injector must click five times.
If the fuel injector does not click:
- Check fuel injectors. Fuel Injectors, Checking
- Press -> button.
Indicated on display
Output Diagnostic Test Mode ->
Cylinder 4 fuel injectors -N33
- Press -> button.
Indicated on display
Output Diagnostic Test Mode ->
Cylinder 4 fuel injectors -N33
After pressing arrow button, fuel injector must click five times.
If the fuel injector does not click:
- Check fuel injectors. Fuel Injectors, Checking
- Press -> button.
Indicated on display
Output Diagnostic Test Mode ->
Cylinder 3 fuel injectors -N32
- Press -> button.
Indicated on display
Output Diagnostic Test Mode ->
Cylinder 3 fuel injectors -N32
After pressing -> button, fuel injector must click five times.
If the fuel injector does not click:
- Check fuel injectors. Fuel Injectors, Checking
- Press -> button.
Indicated on display
Output Diagnostic Test Mode ->
Cylinder 6 fuel injectors -N84
- Press -> button.
Indicated on display
Output Diagnostic Test Mode ->
Cylinder 6 fuel injectors -N84
After pressing -> button, fuel injector must click five times.
If the fuel injector does not click:
- Check fuel injectors. Fuel Injectors, Checking
- Press -> button.
Indicated on display
Output Diagnostic Test Mode ->
Cylinder 2 fuel injectors -N31
- Press -> button.
Indicated on display
Output Diagnostic Test Mode ->
Cylinder 2 fuel injectors -N31
After pressing -> button, fuel injector must click five times.
If the fuel injector does not click:
- Check fuel injectors. Fuel Injectors, Checking
- Press -> button.
Indicated on display
Output Diagnostic Test Mode ->
Cylinder 5 fuel injectors -N83
- Press -> button.
After pressing -> button, fuel injector must click five times.
Indicated on display
Output Diagnostic Test Mode ->
Cylinder 5 fuel injectors -N83
If the fuel injector does not click:
- Check fuel injectors. Fuel Injectors, Checking
- Press button.
Indicated on display
Output Diagnostic Test Mode ->
END
- Press button.
Indicated on display (function selection):
Rapid data transfer HELP
Select function XX
NOTE: The output Diagnostic Test Mode (DTM) cannot be re-initiated until the engine is started and ignition switched off and then on again.