Output Diagnostic Test Mode (DTM) (Function 03)
Output Diagnostic Test Mode (DTM) (function 03)
The output Diagnostic Test Mode (DTM) is part of the electrical check. The following components can be checked via the output diagnostic test mode:
- Speedometer
- Tachometer
- Fuel gauge
- Odometer display
- Oil pressure warning buzzer
- Fuel reserve warning light
- Coolant temperature/engine coolant level indicator warning light
- Oil pressure warning light
- Dual brake circuit and parking brake system warning light
- All warning lights for the vehicle optional equipment
- If there is a malfunction during output DTM, replace instrument cluster.
- If no malfunction is identified during output DTM, check wiring and connections to instrument cluster.
Output Diagnostic Test Mode (DTM), initiating
NOTE:
- 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 VAG 1551 scan tool, select "Rapid data transfer" operating mode 1, switch ignition on, and input "Instrument Cluster" address word 17.
Indicated on display
Rapid data transfer HELP
Select function XX
- Press buttons -0- and -3- to select function 03 "Output Diagnostic Test Mode".
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
Output Diagnostic Test Mode ->
Analog display
After pressing -> button, the following instrumental functional checks will occur simultaneously:
- Tachometer needle moves over complete display range
- Speedometer needle moves over complete display range
- Fuel gauge needle moves over complete display range
After checking movement over display ranges, the following constant values are displayed:
- Tachometer: 3000 RPM
- Speedometer: 100 km/h (65 mph)
- Fuel gauge: 112
- Press -> button.
The analog displays again indicating all actual values.
Indicated on display
Output Diagnostic Test Mode ->
Warning Lamp Test Combi Instrument
The following warning lights light up continuously:
- Coolant temperature/engine coolant level indicator
- Dual brake circuit and parking brake system
- Oil pressure
- Fuel reserve
- Press -> button.
Indicated on display
Output Diagnostic Test Mode ->
Seat Belt Warning Light - K19
Seat belt warning light -K19- lights
Indicated on display
Output Diagnostic Test Mode ->
Signal
Oil pressure warning buzzer is activated intermittently
- Press -> button.
Indicated on display
Output Diagnostic Test Mode ->
Segment Test
All liquid crystal segments in speedometer display are activated and become visible.
- Press -> button.
Indicated on display
Output Diagnostic Test Mode ->
ECT Overheat Test
Coolant temperature/engine coolant level indicator warning light is activated.
Safety function (high coolant temperature cut-out for the A/C clutch) is activated approx. 5 seconds later.
- Press -> button.
Indicated on display for instrument clusters with manufacturer code M73:
Output Diagnostic Test Mode ->
END
- Press -> button.
All actual values are displayed again.
Indicated on display
Rapid data transfer HELP
Select function XX
- Press buttons -0- and -6- to select function "End Output" function 06.
Indicated on display
Rapid data transfer Q
06 - End Output
- Press -Q- button to confirm input.
Indicated on display
Rapid data transfer HELP
Insert address word XX
The scan tool returns to the start of the program sequence.