Signal Too High or Signal Missing. Permanent Fault

Signal too high or Signal missing. Permanent fault

Checking the component, wiring and connectors
Check the resistance of the fuel level sensor (left-hand side). The resistance across each sensor may vary between 12 ohms (full fuel tank) and 383 ohms (empty fuel tank).

Hint: The resistance of the fuel level sensor (left-hand side) can be measured between fuel level sensor connector terminals #5 and #6.

Check the cables between fuel level sensor connector terminal #5 and breakout box terminal #A02 (#A2). Check for a short-circuit to ground. Check for an open-circuit. Check for a short-circuit to supply voltage.
Check the ground lead between breakout box terminal #A10 (#A10) and fuel level sensor connector terminal #6. Check for an open-circuit.
Remedy as necessary.

Other information:
- For further information about signals and other values, see Signal specification Pinout Values and Diagnostic Parameters
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box
- To access the rear electronic module (REM), see Relay/fuse box cargo compartment/Rear electronic module (REM), replacing Integrated Relay/Fusebox Cargo Compartment/Rear Electronic Module (REM), Replacing
- To access the fuel level sensor (left-hand side), see Level sensor fuel tank, replacing Service and Repair
- Checking wiring and terminals Checking Wiring And Terminals.










Continue - Verification

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Verification




Verification

Verification

Hint: After the repair it is necessary to check that the fault has been rectified.








- Ignition off.
- Install the components, connect the connectors, etc.
- Make sure there are more than two litres of fuel in the left tank half.
- Ignition on.
Read the fuel level in the left tank half.





Is the value normal?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFICATION FAILED - Fault-tracing information

VERIFIED - Fault Found

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Fault-tracing information




Information

Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Do you want to exit fault-tracing?

Yes - FAULT-TRACING FAILED

No - Attempt New Test

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Attempt New Test - wiring and connectors

FAULT-TRACING FAILED - No Fault Found

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