BB. Checking Fuel Tank Filler Cover Opening Switch

BBA. Fault Tracing

Condition
No diagnostic trouble codes (DTCs) stored.

Possible Source
Open-circuit in signal cable from fuel tank filler cover opening switch.
Open-circuit in switch ground lead.
Faulty switch.
Start fault-tracing with BBB.


BBB1. Checking Signal From Fuel Tank Filler Cover Opening Switch





Ignition on.
Go into scrolling values.
Activate fuel tank filler cover opening switch
Read off switch status.
The value should be LOW when the switch is activated.
Is the value LOW?
Yes: Fault not found
No: Go to BBB2.


BBB2. Checking Connectors

Remove driver's door panel.
Check VGLA control module connector and fuel tank filler cover switch connector for contact resistance and oxidation according to WWA5 WW. Checking Wiring and Connections
Ignition on.
Go into scrolling values.
Activate fuel tank filler cover opening switch
Read off switch status.
The value should be LOW when the switch is activated.
If the value is OK the cause of the fault has been loose connections in the connectors.
Is the value LOW?
Yes: Fault corrected
No: GO to BBB3.


BBB3. Checking For An open-Circuit





Check cable between VGLA control module #A23 and fuel tank filler cover opening switch terminal 1 and the cable between fuel tank filler cover opening switch terminal 3 and ground for an open-circuit according to WWA2 WW. Checking Wiring and Connections

Were any faults found in the cables?
Yes: Go to BBB5.
No: Go to BBB4.


BBB4. Replacing Component

Replace switch according to Service and Repair
Then continue with BBB5.


BBB5. Verification





Hint: After carrying out the repair check that the fault has been remedied.

Ignition off.
Reconnect connectors, reinstall components.
Ignition on,
Go into scrolling values.
Activate fuel tank filler cover opening switch
Read off switch status.
The value should be LOW when the switch is activated.
Is the value LOW?
Yes: Fault corrected
No: Fault not found