Function 03 - Output Diagnostic Test Mode
Function 03 - Output Diagnostic Test Mode
The Output Diagnostic Test Mode is part of the electrical check. The following components can be checked by the Output Diagnostic Test Mode (DTM):
• Speedometer
• Tachometer
• Coolant temperature gauge
• Fuel gauge
• Malfunction lamps
• Seat belt warning lamp (when activated using code)
• Buzzer/Gong
• Displays (odometer, multifunction indicator or digital clock, selector lever position display for automatic gearboxes)
- If malfunction is determined when performing output DTM, exchange instrument cluster.
- If no malfunction is determined when performing output DTM, check wiring and connections to instrument cluster using wiring diagram.
Output Diagnostic Test Mode, Initiating
• Output Diagnostic Test Mode (DTM) cannot be initiated or will be interrupted if engine is running or vehicle is moving,
• Use C button to exit test sequence at any time.
- Connect scan tool (VAG 1551) , input address word 17 "Instrument cluster".
After control module identification and immobilizer identification number is displayed:
- Press -> button.
Indicated on display (select function):
Rapid data transfer HELP
Select function XX
- Press buttons 0 and 3 to select function 03 "Output Diagnostic Test Mode (DTM)".
Indicated on display
Rapid data transfer Q
03 - Output Diagnostic Test Mode
- Press Q button to confirm input.
No indication on all displays and all warning lights to be checked are unlit.
Indicated on display
Rapid data transfer ->
Analog display
After pressing Q button, the following instrument functional checks are carried out.
• Tachometer needle moves over complete display range
• Speedometer needle moves over complete display range
• Coolant temperature needle moves over complete display range
• Fuel gauge needle moves over complete display range
• On VDO instrument clusters, the instruments are activated simultaneously
• On MMO instrument clusters, the instruments are activated sequentially
After all instrument display range checks, the following constant values are displayed:
- Press -> button.
Indicated on display:
Output Diagnostic Test Mode ->
Warning lamp test Combi instrument
The warning lamps are activated and light continuously (includes all warning lamps for vehicle equipment having output DTM capability coded into the instrument cluster
- Press -> button.
Indicated on display:
Output Diagnostic Test Mode ->
Seat belt warning lamp K19
Safety belt warning lamp (K19) lights (when activated by code).
- Press -> button.
Indicated on display:
Output Diagnostic Test Mode ->
Gong
The buzzer/gong is activated and a warning tone is emitted at intervals.
- Press -> button.
Indicated on display:
Output Diagnostic Test Mode ->
Segment test
All liquid crystal segments in the speedometer display and tachometer are activated and appear on the display.
- Press -> button.
Indicated on display:
Output Diagnostic Test Mode ->
Coolant, excessive temp test
VDO Instrument cluster:
No display in instrument cluster!
High coolant temperature cut-out for the A/C clutch is activated approximately 5 seconds later.
MMO Instrument cluster:
Coolant temperature warning lamp lights and warning tone sounds.
High coolant temperature cut-out for the A/C clutch is activated approximately 5 seconds later.
- Press -> button.
Indicated on display for instrument clusters with manufacturer code MMO:
Output Diagnostic Test Mode ->
END
Indicated on display for instrument clusters with manufacturer code VDO:
Function is unknown or ->
cannot be carried out at the moment
End output diagnostic test mode for VDO instrument clusters by pressing -> button.
All actual values are displayed again.
Indicated on display (select function):
Rapid data transfer HELP
Select function XX
- Press buttons 0 and 6 to select function 06 "End output".
Indicated on display:
Rapid data transfer Q
06 - End output
- Press Q button to confirm entry.
Indicated on display:
Rapid data transfer Help
Enter address word XX
Tester is again in basic function.