Signal Too High/Signal Missing. Permanent Fault

Signal too high/Signal missing. Permanent fault

Checking components, wires and connectors
Check the fuel gauge sensor resistance (left side). The resistance across the respective sensor may vary between 12 ohm (full tank) and 383 ohm (empty tank).

Hint: Fuel gauge sensor resistance (left side) can be measured between fuel gauge sensor connector 5 and 6.

Check wires between fuel gauge sensor connector 5 and test box A02 ( A2) for an open circuit, as described in Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault , a short circuit to ground, as described in Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault and a short circuit to voltage supply, as described in Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Check ground wire between test box A10 ( A10) and fuel gauge sensor connector 6 for an open circuit as described in Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Do the necessary corrective action.

Additional information:
- For information on signals and additional values, see Signal specification Signal Specification.
- To connect the test box, see Connecting the breakout box Connecting Breakout Box, Rear Electronic Module (REM).
- To access the control unit, see Integrated relay/fusebox cargo compartment/Rear electronic module (REM), replacing Integrated Relay/Fusebox Cargo Compartment/Rear Electronic Module (REM), Replacing.
- To access fuel gauge sensor, see Left fuel gauge sensor Left Fuel Gauge Sensor.









Continue - Verification

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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 liters of fuel in the left tank half.
- Ignition on.
Read the fuel level in the left tank half.





Is the value normal?

Yes - Verification completed

No - Trouble-shooting information

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Trouble-shooting 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 - Exit Fault-Tracing

No - Attempt New Test

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Attempt New Test - wires and connectors

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