Output Diagnostic Test Mode (DTM), initiating

WARNING: This page is about a different variant/trim than selected.

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
VAG1598/31 test box
VAG1594 connector test kit
VAG1526 multimeter or VAG1715 multimeter
VAG1527B voltage tester
Wiring diagram

Test requirements

Fig 1: Identifying Main Fuse Panel

Courtesy of VOLKSWAGEN UNITED STATES, INC.

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). Switch ignition on and select Engine Control Module (ECM) using address word 01 (connecting scan tool and selecting ECM. Refer to VAG1551 Scan Tool (ST), connecting and selecting "Engine Electronics" address word 01 ).

Rapid data transfer HELP
Select function XX

Indicated on display

Operate scan tool according to indications on display:
Press buttons -0- and -3- to select "Output Diagnostic Test Mode" function 03.

Rapid data transfer Q
03-Output Diagnostic Test Mode

Indicated on display

Press -Q- button to confirm input.

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

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

Indicated on display

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

If valve does not click:

Fig 2: EVAP Canister Purge Regulator Valve & Connector

Courtesy of VOLKSWAGEN UNITED STATES, INC.

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.

Refer to 20 - FUEL SUPPLY

LED does not blink:

Finish output Diagnostic Test Mode (DTM).
Switch ignition off.

Fig 3: Identifying Test Box V.A.G 1598/31 Connected To Control Module Wiring Harness

Courtesy of VOLKSWAGEN UNITED STATES, INC.

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 Ω

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 Fuel Pump (FP) relay -J17- for open circuit according to wiring diagram.

Wire resistance: max. 1.5 Ω

If no malfunctions are found in wires:

Replace Engine Control Module (ECM). Refer to Engine Control Module (ECM), replacing .

Activating secondary AIR solenoid valve -N112-:

Press → button.

Output Diagnostic Test Mode →
Secondary Air Injection valve -N112

Indicated on display

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

If valve does not click:

Fig 4: Secondary AIR Solenoid Valve, Bracket & Connector

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove bracket -3-.
Disconnect connector -1- from solenoid valve -2- and connect 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.

Fig 5: Secondary AIR Solenoid Valve, Bracket & Connector

Courtesy of VOLKSWAGEN UNITED STATES, INC.

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

Refer to 26 - EXHAUST SYSTEM, EMISSION CONTROLS

LED does not blink:

Finish output Diagnostic Test Mode (DTM).
Switch ignition off.

Fig 6: Identifying Test Box V.A.G 1598/31 Connected To Control Module Wiring Harness

Courtesy of VOLKSWAGEN UNITED STATES, INC.

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 Ω

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 Fuel Pump (FP) relay -J17- for open circuit according to wiring diagram.

Wire resistance: max. 1.5 Ω

If no malfunctions are found in wires:

Replace Engine Control Module (ECM). Refer to Engine Control Module (ECM), replacing .

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

Fig 7: Locating Secondary Air Injection Pump Relay J299 Fuse

Courtesy of VOLKSWAGEN UNITED STATES, INC.

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

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

Indicated on display

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:

Fig 8: Secondary Air Injection Pump Motor & 2-Pin Connector

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Disconnect 2-pin connector -1- from Secondary Air Injection (AIR) pump motor -2- and connect 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-:

Refer to 26 - EXHAUST SYSTEM, EMISSION CONTROLS

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:

Fig 9: Secondary Air Injection Pump Relay

Courtesy of VOLKSWAGEN UNITED STATES, INC.

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.

Fig 10: Secondary Air Injection Pump Relay

Courtesy of VOLKSWAGEN UNITED STATES, INC.

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 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 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.

Fig 11: Identifying Test Box V.A.G 1598/31 Connected To Control Module Wiring Harness

Courtesy of VOLKSWAGEN UNITED STATES, INC.

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 Ω

If no malfunctions are found in wire:

Replace Engine Control Module (ECM). Refer to Engine Control Module (ECM), replacing .

Activating wastegate bypass regulator valve -N75-:

Press → button.

Output Diagnostic Test Mode →
Wastegate Bypass Regulator valve -N75

Indicated on display

Solenoid valve must click.

If valve does not click:

Fig 12: Wastegate Bypass Regulator Solenoid Valve & Connector

Courtesy of VOLKSWAGEN UNITED STATES, INC.

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.

Refer to 21 - TURBOCHARGER, G-CHARGER

LED does not blink:

Finish output Diagnostic Test Mode (DTM).
Switch ignition off.

Fig 13: Identifying Test Box V.A.G 1598/31 Connected To Control Module Wiring Harness

Courtesy of VOLKSWAGEN UNITED STATES, INC.

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 Ω

Also check 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 Fuel Pump (FP) relay -J17- for open circuit according to wiring diagram.

Wire resistance: max. 1.5 Ω

If no malfunctions are found in wires:

Replace Engine Control Module (ECM). Refer to Engine Control Module (ECM), replacing .

Activating Leak Detection Pump (LDP) -V144-:

Press → button.

Output Diagnostic Test Mode →
Leak Detection Pump

Indicated on display

Diagnostic pump must start up in intervals.

If Fuel Pump (FP) does not start up:

Fig 14: Locating 3-Pin Connector At Fuel System Leak Detection Pump V144

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove 3-pin connector for 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-

Refer to 20 - FUEL SUPPLY

LED does not blink:

Finish output Diagnostic Test Mode (DTM).
Switch ignition off.

Fig 15: Identifying Test Box V.A.G 1598/31 Connected To Control Module Wiring Harness

Courtesy of VOLKSWAGEN UNITED STATES, INC.

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 Ω

Check wire between test box socket 25+3-pin connector terminal 2 for open circuit according to wiring diagram.

Wire resistance: max. 1.5 Ω

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 Fuel Pump (FP) relay -J17- for open circuit according to wiring diagram.

Wire resistance: max. 1.5 Ω

If no malfunctions are found in wires:

Replace Engine Control Module (ECM). Refer to Engine Control Module (ECM), replacing .

Activating recirculating valve for turbocharger -N249-:

Press → button.

Output Diagnostic Test Mode →
Recirculating Valve for turbocharger -N249

Indicated on display

Solenoid valve must click

If valve does not click:

Fig 16: Connector And Solenoid Valve - Recirculating Valve For Turbocharger

Courtesy of VOLKSWAGEN UNITED STATES, INC.

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

LED must blink

LED blinks:

Finish output Diagnostic Test Mode (DTM).
Switch ignition off.
Replace solenoid valve.

Refer to 21 - TURBOCHARGER, G-CHARGER

LED does not blink:

Finish output Diagnostic Test Mode (DTM).
Switch ignition off.

Fig 17: Identifying Test Box V.A.G 1598/31 Connected To Control Module Wiring Harness

Courtesy of VOLKSWAGEN UNITED STATES, INC.

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 Ω

Also check 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 Fuel Pump (FP) relay -J17- for open circuit according to wiring diagram.

Wire resistance: max. 1.5 Ω

If no malfunctions are found in wires:

Replace Engine Control Module (ECM). Refer to Engine Control Module (ECM), replacing .

Activate fuel injectors (-N30-...-N33-):

Press → button.

Output Diagnostic Test Mode →
Injector cylinder 1 -N30

Indicated on display

Press → button.

Output Diagnostic Test Mode →
Injector cylinder 1 -N30

Indicated on display

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.

Refer to 20 - FUEL SUPPLY

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

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

Check fuel injectors. Refer to Injectors, checking .
Press → button.

Rapid data transfer HELP
Select function XX

Indicated on display

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