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Home >> Volkswagen >> 2000 >> Golf (1J1) L4-1.8L Turbo (AWD) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Scan Tool Testing and Procedures >> Output Diagnostic Test Mode (DTM), (Function 03)

Output Diagnostic Test Mode (DTM), (Function 03)




Output Diagnostic Test Mode (DTM) activates the following components in the specified 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. Leak Detection Pump (LDP) tank ventilation system
6. Recirculating valve for turbocharger -N249-
7. Cylinder 1 fuel injector -N30-
8. Cylinder 3 fuel injector -N32-
9. Cylinder 4 fuel injector -N33-
10. Cylinder 2 fuel injector -N31-

Special tools and equipment
- VAG1551 Scan Tool (or VAG1552 mobile scan tool) with VAG1551/3 cable
- VAG 1598/31 test box
- VAG1594 connector test kit
- VAG1526 multimeter or VAG1715 multimeter
- VAG1527B voltage tester
- Wiring diagram

Test requirements







- Fuses no. 5, 10, 13, 28, 29, 32, 34 and 43 must be OK.
- Ignition switched on, engine not running


NOTE:
- Output Diagnostic Test Mode is only possible with engine idle and ignition switched on.
- Output Diagnostic Test Mode is aborted if engine is started or an RPM signal is recognized.
- In output Diagnostic Test Mode (DTM), individual actuators are activated until the next actuator is selected by pressing the -> button.
- Actuators are checked either acoustically or by touch.
- To repeat output Diagnostic Test Mode (DTM) without letting the engine run briefly beforehand, switch ignition off for approx. 2 seconds.
- The electric Fuel Pump (FP) runs during all of output Diagnostic Test Mode (DTM).
- Output Diagnostic Test Mode (DTM) is terminated after 60 minutes.


Work procedure
- Connect VAG 1551 scan tool (VAG1552). Then switch ignition on and select the Engine Control Module (ECM) using address word 01 (connecting scan tool and selecting ECM). Refer to "VAG 1551 Scan Tool", [1][2][3][4][5]Connecting VAG 1551 Scan Tool

Indicated on display


Rapid data transfer HELP
Select function XX


- Operate scan tool according to indications on display:
- 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


- Press the -Q- button to confirm input.

Activating Evaporative Emission (EVAP) canister purge regulator valve -N80-:

Indicated on display


Output Diagnostic Test Mode ->
EVAP canister purge regulator valve -N80


- Evaporative Emission (EVAP) canister purge regulator valve must click until next actuator is activated by pressing the -> button.

If valve does not click:







- Disconnect connector -1- from solenoid valve -2- and connect the VAG1527B voltage tester to disconnected connector using VAG1594 connector test kit.
LED must blink.

LED blinks:
- Finish output Diagnostic Test Mode (DTM).
- Switch ignition off.
- Replace solenoid valve.

LED does not blink:
- Finish output Diagnostic Test Mode (DTM).
- Switch ignition off.







- Connect VAG1598/31 test box to control module wiring harness. Engine Control Module (ECM) is not connected.
- Check wire between test box socket 64 + 2-pin connector terminal 2 for open circuit according to wiring diagram.
Wire resistance: max. 1.5 ohms
- Also check the wire for short circuit to B+ or Ground (GND).

If no malfunctions are found in wire:
- Check wire between 2-pin connector terminal 2 and the Fuel Pump (FP) relay -J17- for open circuit according to wiring diagram.
Wire resistance: max. 1.5 ohms

If no malfunctions are found in wires:
- Replace Engine Control Module (ECM).

Activating secondary Air Injection (AIR) solenoid valve -N112-:
- Press -> button.

Indicated on display


Output Diagnostic Test Mode ->
Secondary Air Injection valve -N112


Secondary Air Injection (AIR) solenoid valve must click until next actuator is activated by pressing the -> button.

If valve does not click:







- Remove bracket -3-.
- Disconnect connector -1- from solenoid valve -2- and connect the VAG1527B voltage tester to disconnected connector using VAG1594 connector test kit.
- LED must blink.

LED blinks:
- Finish output Diagnostic Test Mode (DTM).
- Switch ignition off.







LED does not blink:
- Finish output Diagnostic Test Mode (DTM).
- Switch ignition off.







- Replace Secondary Air Injection (AIR) solenoid valve -2-:

- Connect VAG1598/31 test box to control module wiring harness. Engine Control Module (ECM) is not connected.
- Check wire between test box socket 9 + 2-pin connector terminal 2 for open circuit according to wiring diagram.
Wire resistance: max. 1.5 ohms
- Also check the wire for short circuit to B+ or Ground (GND).

If no malfunctions are found in wire:
- Check wire between 2-pin connector terminal 2 and the Fuel Pump (FP) relay -J17- for open circuit according to wiring diagram.
Wire resistance: max. 1.5 ohms

If no malfunctions are found in wires:
- Replace Engine Control Module (ECM).

Activating secondary Air Injection (AIR) pump relay (J299):







- Check fuse for Secondary Air Injection (AIR) pump relay -J299- (arrow).
- Press -> button.

Indicated on display


Output Diagnostic Test Mode ->
Secondary Air Injection pump relay -J299


The Secondary Air Injection (AIR) pump relay activates the Secondary Air Injection (AIR) pump motor and this runs in intervals until the next actuator is activated by pressing the -> button.

If the Secondary Air Injection (AIR) pump motor -V101- does not run in intervals:







- Disconnect 2-pin connector -1- from Secondary Air Injection (AIR) pump motor -2- and connect the VAG1527B voltage tester to disconnected connector using VAG1594 connector test kit.
- LED must blink.

LED blinks:
- Finish output Diagnostic Test Mode (DTM).
- Switch ignition off.
- Replace Secondary Air Injection (AIR) pump motor -V101-:

If LED does not blink, but the Secondary Air Injection (AIR) pump relay does click:
- Finish output Diagnostic Test Mode (DTM).
- Switch ignition off.
- Check wire between Secondary Air Injection (AIR) pump motor -V101- terminal 1 and chassis Ground (GND) for open circuit.

If no malfunctions are found in wire:







- Remove Secondary Air Injection (AIR) pump relay (arrow) from relay carrier in protective housing for control modules.


NOTE:
- Remove battery Ground (GND) strap if tools are necessary for removal of relays or control modules from the relay carrier.
- Obtain radio code for radios with anti-theft coding before disconnecting battery.


- Check wire between Secondary Air Injection (AIR) pump motor -V101- terminal 2 and relay carrier terminal 2 for open circuit according to wiring diagram.

If no malfunctions are found in wire:
- Check voltage supply (terminal 30) for Secondary Air Injection (AIR) pump relay -J299- according to wiring diagram.

If voltage supply is OK:
- Replace Secondary Air Injection (AIR) pump relay -J299-

If LED does not blink and Secondary Air Injection (AIR) pump relay does not click:
- Finish output Diagnostic Test Mode (DTM).
- Switch ignition off.







- Remove Secondary Air Injection (AIR) pump relay (arrow) from relay carrier in protective housing for control modules.


NOTE:
- Remove battery Ground (GND) strap if tools are necessary for removal of relays or control modules from the relay carrier.
- Obtain radio code for radios with anti-theft coding before disconnecting battery.


- Use auxiliary wires from VAG 1594 to connect VAG 1527B voltage tester to terminals 3 and 4 of the relay carrier.
- Initiate output Diagnostic Test Mode (DTM) again and activate Secondary Air Injection (AIR) pump relay -J299-
- LED must blink.

LED blinks:
- Replace Secondary Air Injection (AIR) pump relay -J299-

LED does not blink:
- Use auxiliary wires from VAG 1594 to connect VAG 1527B voltage tester to terminal 3 of the relay carrier and to chassis Ground (GND).
- LED must light up.

LED does not light up:
- Check wire between relay carrier terminal 3 and B+ for open circuit according to wiring diagram.

LED lights up:
- Finish output Diagnostic Test Mode (DTM).
- Switch ignition off.







- Connect VAG1598/31 test box to control module wiring harness. Engine Control Module (ECM) is not connected.
- Check wire between test box socket 66 and terminal 4 on relay carrier for open circuit according to wiring diagram.
Wire resistance: max. 1.5 ohms

If no malfunctions are found in wire:
- Replace Engine Control Module (ECM).

Activating wastegate bypass regulator valve -N75-:

- Press -> button.

Indicated on display


Output Diagnostic Test Mode ->
Wastegate Bypass Regulator valve -N75


- Solenoid valve must click.

If valve does not click:







- Disconnect connector -1 - from solenoid valve -2- and connect the VAG 1527B voltage tester to disconnected connector using VAG1594 connector test kit.
- LED must blink.

LED blinks:
- Finish output Diagnostic Test Mode (DTM).
- Switch ignition off.
- Replace solenoid valve.

LED does not blink:
- Finish output Diagnostic Test Mode (DTM).
- Switch ignition off.







- Connect VAG1598/31 test box to control module wiring harness. Engine Control Module (ECM) is not connected.
- Check wire between test box socket 104 + 2-pin connector terminal 2 for open circuit according to wiring diagram.
Wire resistance: max. 1.5 ohms
- Also check the wire for short circuit to B+ or Ground (GND).

If no malfunctions are found in wire:
- Check wire between 2-pin connector terminal 2 and the Fuel Pump (FP) relay -J17- for open circuit according to wiring diagram.
Wire resistance: max. 1.5 ohms

If no malfunctions are found in wires:
- Replace Engine Control Module (ECM).

Activating Leak Detection Pump (LDP) -V144-:

- Press -> button.

Indicated on display


Output Diagnostic Test Mode ->
Leak Detection Pump


- Diagnostic pump must start up in intervals.

If Fuel Pump (FP) does not start up:







- Remove the 3-pin connector for the Leak Detection Pump (LDP) -V144-.
- Connect VAG 1527B voltage tester to terminals 2 + 3 of disconnected connector using wires from VAG1594 connector test kit.
- LED must blink.

LED blinks:
- Finish output Diagnostic Test Mode (DTM).
- Switch ignition off.
- Replace Leak Detection Pump (LDP) -V144-


LED does not blink:
- Finish output Diagnostic Test Mode (DTM).
- Switch ignition off.







- Connect VAG1598/31 test box to control module wiring harness. Engine Control Module (ECM) is not connected.
- Check wire between test box socket 80 + 3-pin connector terminal 1 for open circuit according to wiring diagram.
Wire resistance: max. 1.5 ohms
- Check wire between test box socket 25 + 3-pin connector terminal 2 for open circuit according to wiring diagram.
Wire resistance: max. 1.5 ohms
- Also check wires for short circuit to B+ or Ground (GND).

If no malfunctions are found in wiring:
- Check wire between 3-pin connector terminal 3 and the Fuel Pump (FP) relay -J17- for open circuit according to wiring diagram.
Wire resistance: max. 1.5 ohms

If no malfunctions are found in wires:
- Replace Engine Control Module (ECM).

Activating recirculating valve for turbocharger -N249-:

- Press -> button.

Indicated on display


Output Diagnostic Test Mode ->
Recirculating Valve for turbocharger -N249


- Solenoid valve must click.

If valve does not click:







- Disconnect connector -1- from solenoid valve -2- and connect the VAG 1527B voltage tester to disconnected connector using VAG1594 connector test kit.
- LED must blink.

LED blinks:
- Finish output Diagnostic Test Mode (DTM).
- Switch ignition off.
- Replace solenoid valve.

LED does not blink:
- Finish output Diagnostic Test Mode (DTM).
- Switch ignition off.







- Connect VAG1598/31 test box to control module wiring harness. Engine Control Module (ECM) is not connected.
- Check wire between test box socket 105 + 2-pin connector terminal 2 for open circuit according to wiring diagram.
Wire resistance: max. 1.5 ohms
- Also check the wire for short circuit to B+ or Ground (GND).

If no malfunctions are found in wire:
- Check wire between 2-pin connector terminal 2 and the Fuel Pump (FP) relay -J17- for open circuit according to wiring diagram.
Wire resistance: max. 1.5 ohms

If no malfunctions are found in wires:
- Replace Engine Control Module (ECM).

Activate fuel injectors (N30-N33):

- Press -> button.

Indicated on display


Output Diagnostic Test Mode ->
Injector cylinder 1 -N30

- Cylinder 1 fuel injector -N30- must click five times.


NOTE: Fuel Pump (FP) must run and the flowing noise must be clearly audible at the fuel pressure regulator. If Fuel Pump (FP) does not run, check activation.


- To switch to next fuel injector, press the -> button.
- Check all fuel injectors like this, according to the injection sequence.

If one of the fuel injectors is not activated (does not click):
- Check fuel injectors. Refer to "Injectors, Checking", Testing and Inspection
- Press -> button.

Indicated on display


Rapid data transfer HELP
Select function XX


- Press buttons -0- and -6- to select "End Output" function 06. Press -Q- button to confirm input.
- Switch ignition off.
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