Operation CHARM: Car repair manuals for everyone.
Home >> Audi >> 1998 >> A8 Sedan (4D2) V8-3.7L (AEW) >> Repair and Diagnosis >> Body and Frame >> Locks >> Power Locks >> Testing and Inspection >> Scan Tool Testing and Procedures >> Output Diagnostic Test Mode (DTM) (Function 03)
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Output Diagnostic Test Mode (DTM) (Function 03)




NOTE:
- The Output Diagnostic Test Mode may only be performed with the vehicle stationary and the engine not running!
- Any malfunctions identified by the Output Diagnostic Test Mode must be traced and repaired.


Output Diagnostic Test Mode (DTM) activates the following components in the specified sequence:
- Generate alarm triggering (alarm is activated alternatively via alarm horn and emergency flashers)
- Trigger interior monitoring (is also triggered if interior monitoring is not installed)
- Simulate crash signal (switching on of emergency flasher system for checking crash signal).

Output Diagnostic Test Mode (function 03)

- Press buttons -0- and -3-.

Indicated on display:


Rapid data transfer Q
03 - Output Diagnostic Test Mode (DTM)


- Press -Q- button to confirm input.

Indicated on display:


Output Diagnostic Test Mode (DTM) ->
Cause alarm to trigger

Alarm is activated alternatively via alarm horn and emergency flasher system.


NOTE: If no ATWS is installed, only the emergency flasher system is triggered.


- Press -> key.

Indicated on display:


Output Diagnostic Test Mode (DTM) ->
Next test mode: Starting


- Press -> key.

Indicated on display:


Output Diagnostic Test Mode (DTM) ->
Activate interior monitoring


Control module for central locking sends a signal for activating interior monitoring.
- The ATWS horn is activated briefly for confirmation
- Warning lamp in fog taillight switch is actuated


NOTE:
- After activating interior monitoring, a system dependent waiting time of 30 seconds must be observed.
- During triggering of an alarm, an entry will be made in DTC memory of control module for central locking "1370; alarm via interior monitoring" as well as in control module for ultra-sound sensors "alarm via sensor for ATWS, fl, fr, rl, rr, front, rear".
- DTCs must be checked and erased in the control module of the respective DTC memory.


- Press -> key.

Indicated on display:


Output Diagnostic Test Mode (DTM) ->
Next test mode: -> Starting


- Press -> key.

Indicated on display:


Output Diagnostic Test Mode (DTM) ->
Simulate crash signal


Switching on of the emergency flasher system.


NOTE:
- DTC "1366, opening via crash signal" is stored in DTC memory of the control module for central locking.
- Output Diagnostic Test Mode (DTM) must be repeated with airbag control module. After performing output Diagnostic Test Mode (DTM) of airbag control module, DTC "01366" opening via crash signal" is also stored in control module for central locking.
- DTC in DTC memory of control module for central locking must be checked and erased.

- Press -> key.

Indicated on display:


Output Diagnostic Test Mode (DTM) ->
End


- Press -> key.

The tester returns to the "Select function" mode.

Indicated on display (function selection):


Rapid data transfer HELP
Select function XX
pro multis · About Operation CHARM