Operation CHARM: Car repair manuals for everyone.
Home >> Audi >> 2002 >> A6 Quattro Sedan (4B4) V8-4.2L (AWN) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Scan Tool Testing and Procedures >> 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 programme is advanced to the next control element by pressing the button.
- The control elements can be tested either by listening or by touching.
- The electric fuel pump runs continuously throughout the DTM.
- 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 DTM activates the following components in the stated sequence:

1. EVAP canister purge regulator valve -N80-
2. Secondary Air Injection (AIR) Solenoid Valve -N112-
3. Secondary Air Injection (AIR) Pump Relay -J299
4. Intake Manifold Change-Over Valve -N156
5. Valve -2- for camshaft adjustment -N208-
6. Leak Detection Pump for EVAP system
7. Intake Manifold Tuning (IMT) Valve -N261
8. Left engine mount 1 (driving direction)
9. Right engine mount 2 (driving direction)
10. Valve -1- for camshaft adjustment N205
11. Cylinder 1 Fuel Injector -N30
12. Cylinder 5 Fuel Injector -N83
13. Cylinder 4 Fuel Injector -N33
14. Cylinder 8 Fuel Injector -N86
15. Cylinder 6 Fuel Injector -N84
16. Cylinder 3 Fuel Injector -N32
17. Cylinder 7 Fuel Injector -N85
18. Cylinder 2 Fuel Injector -N31

Test requirements
- Fuses for engine electronics OK
- Fuel pump relay OK

- Connect Vehicle Diagnostic, Testing and Information System VAS5051 or VAG 1551 Scan Tool and select engine electronics control module by entering address word "01", [1][2]Scan Tool Connecting and Initial Checks When doing this the ignition must be switched on.

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


- Confirm input with -Q- button.

Actuating EVAP Canister Purge Regulator Valve -N80

- Press -> 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
- Press -> button.

Indicated on display


Output Diagnostic Test Mode ->
Secondary Air (AIR) Injection 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, Testing and Inspection

Actuating 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 Injection (AIR) Pump Motor -V101-, which runs at intervals.

If the Secondary Air Injection (AIR) Pump Motor -V101- does not run at intervals:
- Check Secondary Air Injection (AIR) Pump Motor -V101- (located in E-box in plenum chamber, right side), Testing and Inspection

Actuating Intake Manifold Change-Over Valve -N156-
- Press -> button.

Indicated on display


Output Diagnostic Test Mode ->
Intake Manifold Change-Valve -N156


The valve must click.

If the valve is not actuated (does not click):
- Check Intake Manifold Change-Over Valve -N156-. Variable Induction Control Valve

Actuating camshaft adjustment valve -N208-
- Press -> button.

Indicated on display


Output Diagnostic Test Mode ->
Camshaft Adjustment


Camshaft adjustment valve 2 -N208- will continue to be activated (or will click) for about 1 minute.

If camshaft adjustment valve 2 is not activated (or if the valve does not click)
- Check camshaft adjustment valves, Refer to "Valve -1- For Camshaft Adjustment -N205 and Valve -2- For Camshaft Adjustment -N208, Checking" [1][2]Camshaft Position Sensor

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)

Actuating Intake Manifold Tuning (IMT) Valve -2- -N261
- Press -> button.

Indicated on display


Output Diagnostic Test Mode ->
Intake manifold change over valve 2


The valve must click.

If solenoid valve does not click (not actuated)
- Check Intake Manifold Tuning (IMT) Valve 2 -N261-. Variable Induction System
Checking left and right engine mount
- Press -> button.

Indicated on display


Output Diagnostic Test Mode ->
Left EleHyd Engine Mount Solenoid N144


If the solenoid valve is not actuated (does not click)
- Check engine mount, Refer to Testing and Inspection
- Press -> button.

Indicated on display


Output Diagnostic Test Mode ->
Right Ele-Hyd Engine Mount Solenoid N145


If the solenoid valve is not actuated (does not click)
- Check engine mount, Refer to Testing and Inspection

Actuating camshaft adjustment valve 1 -N205-.
- Press -> button.

Indicated on display


Output Diagnostic Test Mode ->
Camshaft Adjustment


Camshaft adjustment valve 1 -N205- will continue to be activated (or will click) for about 1 minute.

If camshaft adjustment valve 1 is not activated (or if the valve does not click)
- Check camshaft adjustment valves, Refer to "Valve -1- For Camshaft Adjustment -N205 and Valve -2- For Camshaft Adjustment -N208, Checking" [1][2]Camshaft Position Sensor

Actuating fuel injectors


NOTE: The fuel injectors are activated in firing order that means Cyl. 1, Cyl. 5, Cyl. 4, Cyl. 8, Cyl. 6, Cyl. 3, Cyl. 7, Cyl. 2.


- Press -> button.

Indicated on display


Output Diagnostic Test Mode ->
Cylinder 1 fuel injectors -N30

- Press -> button.

After pressing arrow button, fuel injector must click five times.

Indicated on display


Output Diagnostic Test Mode ->
Cylinder 1 fuel Injectors -N30


If the fuel injector does not click:
- Check fuel injectors, Refer to "Fuel Injectors, Checking"
Testing and Inspection
- Press -> button.

Indicated on display


Output Diagnostic Test Mode ->
Cylinder 5 fuel injectors -N83


- Press -> button.

After pressing arrow 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, Refer to "Fuel Injectors, Checking" Testing and Inspection
- Press -> button.

Indicated on display


Output Diagnostic Test Mode ->
Cylinder 4 fuel injectors -N33


- Press -> button.

After pressing arrow button, fuel injector must click five times.

Indicated on display


Output Diagnostic Test Mode ->
Cylinder 4 fuel injectors -N33


If the fuel injector does not click:
- Check fuel injectors, Fuel Injectors, Checking
- Press -> button.

Indicated on display


Output Diagnostic Test Mode ->
Cylinder 8 fuel injectors -N86


- Press -> button.

After pressing arrow button, fuel injector must click five times.

Indicated on display


Output Diagnostic Test Mode ->
Cylinder 8 fuel injectors -N86


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.

After pressing arrow button, fuel injector must click five times.

Indicated on display


Output Diagnostic Test Mode ->
Cylinder 6 fuel injectors -N84


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.

After pressing arrow button, fuel injector must click five times.

Indicated on display


Output Diagnostic Test Mode ->
Cylinder 3 fuel Injectors -N32


If the fuel injector does not click:
- Check fuel injectors, Fuel Injectors, Checking
- Press -> button.

Indicated on display


Output Diagnostic Test Mode ->
Cylinder 7 fuel injectors -N85


- Press -> button.

After pressing arrow button, fuel injector must click five times.

Indicated on display


Output Diagnostic Test Mode ->
Cylinder 7 fuel Injectors -N85


If the fuel injector does not click:
- Press -> button.
- Check fuel injectors, Fuel Injectors, Checking

Indicated on display


Output Diagnostic Test Mode ->
Cylinder 2 fuel injectors -N31


- Press -> button.

After pressing arrow button, fuel injector must click five times.

Indicated on display


Output Diagnostic Test Mode ->
Cylinder 2 fuel Injectors -N31


If the fuel injector does not click:
- Check fuel injectors Fuel Injectors, Checking
- Press -> button.

Indicated on display


Output Diagnostic Test Mode ->
END


NOTE: The output Diagnostic Test Mode (DTM) cannot be re-initiated until the engine is started and ignition switched off and then on again.


- Press buttons -0- and -6- to select function "End Output" and confirm by pressing -Q- button.
pro multis · About Operation CHARM