Signal Too High or Signal Missing. Permanent Fault

Signal too high or Signal missing. Permanent fault

Checking wiring and connectors
Check the resistance of the fuel level sensor (right-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 right-hand side fuel level sensor can be measured between fuel level sensor connector terminals #7 and #6. The resistance of the left-hand side fuel level sensor can be measured between fuel level sensor connector terminals #5 and #6.

Check the cables and connections between connector terminal #7 for the fuel level sensors and rear electronic module (REM) terminal #A08 (#A8). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage.
Check the ground lead between control module terminal #A10 (#A10) and fuel level sensor connector terminal #6. Check for an open-circuit.
Check the cables between the left and right fuel level sensors. 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
- To access the fuel level sensor (right-hand side), see Level sensor, fuel tank, right-hand/fuel tank, replacing Level Sensor, Fuel Tank/Fuel Pump, Replacement
- 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 right tank half.
- Ignition on.
Read the fuel level in the right 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 - Checking wiring and connectors

FAULT-TRACING FAILED - No Fault Found

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