With Manufacturer's Scan Tool
Output Diagnostic Test Mode (DTM), Activating
The output Diagnostic Test Mode (DTM) activates the following components in the sequence shown:
1 - Fuel injector No. 1 Cyl. -N30-
2 - Fuel injector No. 2 Cyl. -N31-
3 - Fuel injector No. 3 Cyl. -N32-
4 - Fuel injector No. 4 Cyl. -N33-
5 - Evaporative Emission (EVAP) canister purge regulator valve -N80-
6 - Secondary Air Injection (AIR) solenoid valve -N112-
7 - Secondary Air Injection (AIR) pump relay -J299-
Special tools and equipment
- V.A.G1551/1552 Scan Tool (ST) with VAG1551/3 adapter cable
- VAG1598/22 test box
- Multimeter (Fluke 83 or equivalent)
- VAG1527B voltage tester
- VW1594 adapter set
- Wiring diagram
Requirements
- Main fuses OK
- Fuses 5, 10, 13, 28, 29, 32, 34 and 43 OK
NOTE:
- Checks using the output Diagnostic Test Mode (DTM) can only be carried out if the engine is not running and the ignition is on.
- The output DTM sequence will abort if the engine is started or a rotational impulse is recognized.
- During the output DTM sequence individual components will be activated until advancing to the next component by pressing the -> button.
- Components are checked audibly or by touch.
- If it is necessary to repeat the output DTM sequence without first running the engine briefly, turn off the ignition for approx. 2 seconds.
- The electric fuel pump will run during the complete output DTM.
- The output DTM sequence will abort after 10 minutes.
Test procedure
- Connect V.A.G1551 or VAG1552 mobile Scan Tool (ST).
- Turn on ignition. Select Motronic Engine Control Module (ECM) -J220- by pressing buttons -0- and -1- to insert "Engine Electronics" address word 01. [1][2]Reading and Clearing Diagnostic Trouble Codes
Indicated on display
Rapid data transfer HELP
Select function XX
- Operate scan tool taking into account the information on the display.
- Press buttons -0- and -3- to select "Output Diagnostic Test Mode" function 03.
Indicated on display
Rapid data transfer
03 - Output Diagnostic Test Mode
Activating fuel injectors -N30- through -N33-
- Press -Q- button to confirm input.
Indicated on display
Output Diagnostic Test Mode ->
Injector cylinder 1-N30
NOTE: The fuel pump must run and the flow noise must be distinctly audible at the fuel pressure regulator. If the fuel pump does not run, check activation.
- Open throttle valve.
As soon as the closed throttle position switch opens, the number 1 cylinder fuel injector will click 5 times.
- Press -> button each time to advance to next fuel injector (advancing is also possible without testing each individual fuel injector).
All fuel injectors can be checked one after the other this way.
If one of the fuel injectors is not activated (does not click):
- Check fuel injectors. Fuel Injectors, Checking
Activating Evaporative Emission (EVAP) canister purge regulator valve -N80-
- Press -> button.
Indicated on display
Output Diagnostic Test Mode ->
EVAP canister purge regulator valve -N80-
The Evaporative Emission (EVAP) canister purge regulator valve -N80- must click until the next component is activated by the pressing -> button.
If the valve clicks, but a malfunction is still suspected (valve does not open or close):
- Disconnect hose from pressure retention valve from solenoid valve.
- Connect an auxiliary hose to vacant valve connection.
- Blow into auxiliary hose during Output Diagnostic Test Mode (DTM) in direction of throttle valve control module.
Valve must open and close.
If the solenoid valve does not click:
- Disconnect 2-pin harness connector from Evaporative Emission (EVAP) canister purge regulator valve -N80- (arrow).
- Connect VAG1527B voltage tester using adapter cables from VW1594 to detached harness connector.
The LED must flash (bright/darker).
If LED flashes:
- Proceed with output DTM until completed.
- Turn off ignition.
- Replace Evaporative Emission (EVAP) canister purge regulator valve -N80-.
- Check DTC memory. If necessary, repair any malfunctions and erase DTC memory.
- Display readiness code. Monitors, Trips, Drive Cycles and Readiness Codes
If DTC memory has been erased, or the Motronic Engine Control Module (ECM) - J220- was disconnected from permanent battery (B+) voltage, generate the readiness code again 2. Monitors, Trips, Drive Cycles and Readiness Codes
If LED does not flash:
- Proceed with Output DTM until completed.
- Turn off ignition.
- Remove wiper arms and plenum chamber cover.
- Connect VAG1598/22 test box to control module wiring harness.
- Check wire for open circuit between test box sockets 15 and 2-pin harness connector terminal 2 using wiring diagram.
Wire resistance: max. 1.5 ohms
- Additionally, check wire for short circuit to battery positive (B+) and Ground (GND).
Specified value: Infinity ohms
- Check wire between 2-pin connector terminal 1 and Fuel Pump (FP) relay -J17- for open circuit using wiring diagram.
Wire resistance: max. 1.5 ohms
If no wiring malfunction is detected:
- Replace Motronic Engine Control Module (ECM) -J220-.
Activating Secondary Air Injection (AIR) solenoid valve -N112-
- Press -> button.
Indicated on display
Output Diagnostic Test Mode ->
Secondary air injection valve -N112
The secondary air inlet valve must run until the next component is activated by pressing the -> button.
If the relay does not click:
- Disconnect 2-pin harness connector from Secondary Air Injection (AIR) solenoid valve -N112- (arrow).
- Connect VAG1527B voltage tester using adapter cables from VW1594 to detached harness connector.
The LED must flash (bright/darker).
If LED flashes:
- Proceed with Output DTM until completed.
- Turn off ignition.
- Replace Secondary Air Injection (AIR) solenoid valve -N112-.
- Check DTC memory. If necessary, repair any malfunctions and erase DTC memory.
Reading Diagnostic Trouble Codes
Clearing Diagnostic Trouble Codes
- Display readiness code. Monitors, Trips, Drive Cycles and Readiness Codes
If DTC memory has been erased or the Motronic Engine Control Module (ECM) -J220- was disconnected from permanent battery (B+) voltage, generate the readiness code again. Monitors, Trips, Drive Cycles and Readiness Codes
LED does not flash:
- Proceed with output DTM until completed.
- Turn off ignition.
- Remove wiper arms and plenum chamber cover.
- Connect VAG1598/22 test box to control module wiring harness.
- Check wire for open circuit between test box socket 33 + 2-pin harness connector terminal 2 using wiring diagram.
Wire resistance: max. 1.5 ohms
- Additionally check wire for short to battery positive (B+) and Ground (GND).
Specified value: Infinity ohms
- Check wire between 2-pin connector terminal 1 and Fuel Pump (FP) relay - J17- for open circuit using wiring diagram.
Wire resistance: max. 1.5 ohms
If no wiring malfunction is detected:
- Replace Motronic Engine Control Module (ECM) -J220-.
Activating Secondary Air Injection (AIR) pump relay -J299-
- 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 pump motor, which runs at intervals, until output diagnostic test mode is terminated by pressing the -> button.
If the Secondary Air Injection (AIR) pump motor -V101- does not run at intervals:
- Disconnect 2-pin harness connector from Secondary Air Injection (AIR) pump motor-V101- (arrow).
- Connect VAG1527B voltage tester using adapter cables from VW1594 to detached connector.
The LED must flash.
If LED flashes:
- Proceed with output DTM until completed.
- Turn off ignition.
- Replace Secondary Air Injection (AIR) pump motor-V101-.
- Check DTC memory. If necessary, repair any malfunctions and erase DTC memory.
Reading Diagnostic Trouble Codes
Clearing Diagnostic Trouble Codes
- Display readiness code. Monitors, Trips, Drive Cycles and Readiness Codes
If DTC memory has been erased or the Motronic Engine Control Module (ECM) -J220- was disconnected from permanent battery (B+) voltage, generate the readiness code again. Monitors, Trips, Drive Cycles and Readiness Codes
If LED does not flash, but Secondary Air Injection (AIR) pump relay -J299- clicks:
- Proceed with output DTM until completed.
- Turn off ignition.
- Check wire between Secondary Air Injection (AIR) pump motor -V101- and terminal 1 and body Ground (GND) for open circuit.
If no malfunction in wire is detected:
- Pull Secondary Air Injection (AIR) pump relay -J299- (arrow) off relay plate in control module protective housing.
NOTE:
- If tools are necessary to pull relays or control modules out of the relay plate, first disconnect battery Ground (GND) strap.
- Before disconnecting battery Ground (GND) strap, obtain code for radios with anti-theft coding.
- Using wiring diagram, check wire between Secondary Air Injection (AIR) pump motor -V101- terminal 2 and terminal 2 on relay plate for open circuit.
If no malfunction in wire is detected:
- Using wiring diagram, check voltage supply (terminal 30) for Secondary Air Injection (AIR) pump relay -J299-.
If voltage supply is OK:
- Replace Secondary Air Injection (AIR) pump relay -J299-.
- Check DTC memory. If necessary, repair any malfunctions and erase DTC memory
Reading Diagnostic Trouble Codes
Clearing Diagnostic Trouble Codes
- Display readiness code. Monitors, Trips, Drive Cycles and Readiness Codes
If DTC memory has been erased or the Motronic Engine Control Module (ECM) -J220- was disconnected from permanent battery(B+) voltage, generate the readiness code again. Monitors, Trips, Drive Cycles and Readiness Codes
If LED does not flash and Secondary Air Injection (AIR) pump relay -J299- does not click:
- Proceed with output DTM until completed.
- Turn off ignition.
- Pull Secondary Air Injection (AIR) pump relay -J299- (arrow) off relay plate in control module protective housing.
NOTE:
- If tools are necessary to pull relays or control modules out of the relay plate, first disconnect battery Ground (GND) strap.
- Before disconnecting battery Ground (GND) strap obtain code for radios with anti-theft coding.
- Using adapter cables from VW1594 connect VAG1527B voltage tester to terminals 3 and 4 on relay plate.
The LED must flash.
If LED flashes:
- Replace Secondary Air Injection (AIR) pump relay -J299-.
- Check DTC memory. If necessary, repair any malfunctions and erase DTC memory.
Reading Diagnostic Trouble Codes
Clearing Diagnostic Trouble Codes
- Display readiness code. Monitors, Trips, Drive Cycles and Readiness Codes
If DTC memory has been erased or the Motronic Engine Control Module (ECM) -J220- was disconnected from permanent battery (B+) voltage, generate the readiness code again. Monitors, Trips, Drive Cycles and Readiness Codes
If LED does not flash:
- Using adapter cables from VW1594 connect VAG1527B voltage tester to terminal 3 of relay plate and body Ground (GND).
The LED must light up.
If LED does not light up:
- Using wiring diagram, check wire between terminal 3 of relay plate and Fuel Pump (FP) relay -J17- for open circuit.
Wire resistance: max. 1.5 ohms
If LED lights up:
- Proceed with output DTM until completed.
- Turn off ignition.
- Remove wiper arms and plenum chamber cover.
- Connect VAG1598/22 test box to control module wiring harness.
- Check wire between test box socket 30 and terminal 4 on relay plate for open circuit using wiring diagram.
Wire resistance: Max. 1.5 ohms
- If no wiring malfunction is detected:
- Replace Motronic Engine Control Module (ECM) -J220-.
NOTE: After completing output diagnostic test mode, turn off the ignition. If the ignition is not turned off before attempting to start, the engine will not start. The fuel injectors and the ignition coil with power output stage will not be activated.