Fuel Gauge, Adapting, From 06.99
[Fuel Gauge, Adapting
If the fuel gauge displays the contents of the fuel tank as being too high or too low, the fuel gauge needle position can be corrected (adapted).
- Perform output Diagnostic Test Mode (DTM) for instrument cluster => [ Function 03 - Output Diagnostic Test Mode ] Function 03 - Output Diagnostic Test Mode.
- Check function of fuel gauge sender if output Diagnostic Test Mode (DTM) does not indicate a malfunction.
- Check resistance value of fuel gauge sender in measuring value block => [ Function 08- Read Measuring Value Block ] Function 08- Read Measuring Value Block.
If measuring value block does not indicate a short circuit or open circuit in the wiring or the fuel gauge sender, continue checks:
Special tools, testers and auxiliary items required
• Fuel extraction unit (VAG 1433 A) (or local equivalent)
Adapting
- Switch off ignition.
- Drain fuel tank completely (VAG1433 A), then fill with 7 liters (1.84 gal) of fuel (ensure ignition is OFF).
• Wait a minimum of 1 minute before proceeding with adaptation in order to ensure a stable fuel level for adaptation purposes.
CAUTION!
• Fire hazard. DO NOT smoke or work near heaters or have anything in the area that can ignite fuel.
• Always drain fuel from fuel tank using an approved fuel cart.
• Wear fuel-resistant gloves whenever working with open parts of the fuel system.
- Connect scan tool (VAG 1551) , select 1 "Rapid Data Transfer", switch on ignition, input address word 17 "Instrument cluster".
Indicated on display:
Rapid data transfer Q
17 instrument cluster
- Press Q button to confirm input.
Indicated on display (example only):
1C0920901C A4-COMBI INSTR.VDO V04 ->
Coding 00000 WSC 00000
- Press Q button to confirm input.
Indicated on display:
IMMO-IDENT No.: VWZ7Z0V0066808 ->
- Press Q button to confirm input.
Indicated on display (select function):
Rapid data transfer HELP
Select function XX
- Press buttons 1 and 0 to select function 10 "Adaptation".
Indicated on display:
Rapid data transfer Q
10 - Adaptation
- Press Q button to confirm input.
Indicated on display:
Adaptation
Enter channel number XX
- Press buttons 3 and 0 to select channel 30.
Indicated on display:
Adaptation Q
Enter channel number 30
- Press Q button to confirm input.
Indicated on display:
Channel 30 Adaptation 128 ->
[ -1 3-]
- Use button 1 to decrease adaptation value down to 120
- Use button 3 to increase value up to 136, e.g. 130.
- Indicated on display:
Channel 30 Adaptation 130 Q
[ -1 3-]
Adaptation is correct when the fuel gauge needle is positioned on the middle of the three red graduations (reserve) as illustrated.
When needle position is OK:
- Press Q button to confirm input.
- Indicated on display (example only):
Channel 30 Adaptation 130 Q
Store changed value?
- Press Q button to confirm input.
- Indicated on display:
Channel 30 Adaptation 130 ->
Changed value is stored
- Press -> button to complete adaptation sequence.
Indicated on display:
Rapid data transfer Help
Enter address word XX
• If fuel gauge cannot be adapted correctly, replace fuel gauge sender.
- 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 input.
Indicated on display:
Rapid data transfer Help
Enter address word XX
The tester is now in basic function again.