16 00 102 Checking fuel tank and tank venting system for leaks with tank leakage diagnosis module (DMTL)
WARNING: This page is about a different variant/trim than selected.
NOTE:
An OBD fault is indicated by the "Check Engine" indicator lamp in the instrument cluster lighting up.
This may indicate a leak in the tank venting system.
Information on this is provided by the fault memory of the DME control unit.
This may indicate a leak in the tank venting system.
Information on this is provided by the fault memory of the DME control unit.
- Read out fault memory of DME control unit and carry out a diagnosis in accordance with faults stored.
- A leak test of the DMTL module is then carried out if:
- The components of the DMTL module are OK.
- A fault is stored in the DME fault memory (tank leak detected).
Adhere to following conditions in order to carry out a correct leak test:
- Content of fuel tank < 90 %
- Reserve indicator lamp "off"
- Put vehicle into workshop for at least 2 hours such that the fuel temperature corresponds to the workshop temperature. (Ideal fuel temperature approx. 10...20°C)
- Never freshly refuel the vehicle. (Severe gas emissions from fresh fuel)
- Check that tank cap is correctly seated.
WARNING:
During the leak test, under no circumstances apply external pressurization through the fuel filler neck as this may cause incorrect readings.
Clear DME fault memory.
In the Diagnosis and Information System (DIS), go to the "Function and component selection" page.
Work through tank leakage diagnosis module. Leakage test is carried out.
If fault is recorded again in DME fault memory (tank leak detected), CARRY OUT LEAK TEST .