Operation CHARM: Car repair manuals for everyone.

Signal Too High






Signal too high

Checking fuel level sensor resistance








- Ignition off.
- Disconnect fuel level sensor connector according to Replacing sensor Replacing Sensor.
Connect an ohmmeter between terminals 1 and 2 in the fuel level sensor connector.









The ohmmeter should read 10-325 ohms depending on fuel level.

OK - Checking ground lead resistance

Not OK - Replacing component

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Replacing component
Try a new fuel level sensor according to
- Replacing sensor Replacing Sensor.






Continue - Verification

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Checking ground lead resistance








- Ignition off.
- Fuel level sensor disconnected.
Connect an ohmmeter between fuel level sensor connector terminal 1 (cable harness side) and ground.









The ohmmeter should read approximately 0 ohms.

OK - Checking signal to fuel level sensor

Not OK - Checking ground from combined instrument panel

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Checking ground from combined instrument panel












- Ignition off.
- Fuel level sensor disconnected.
- Connect breakout box according to Connecting the breakout box Connecting the Breakout Box.
- Connect combined instrument panel.
Connect an ohmmeter between #4 (#A4) and #15 (#A15) on the breakout box.









The ohmmeter should read approximately 0 ohms.

OK - Checking for an open-circuit

Not OK - Data read-out

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Data read-out
- Disconnect the Volvo Scan Tool (ST) from VIDA.
- Connect the Volvo Scan Tool (ST) to the data link connector (DLC).
Read off all data from the combined instrument panel control module and note values.


Continue - Replacing component

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Replacing component
Try a new connection plate according to: Replacing connection plate Replacing Connection Plate.






Continue - Programming combined instrument panel

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Programming combined instrument panel
Program the control module with the values previously read off the combined instrument panel control module.


Continue - Verification

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Checking for an open-circuit
Check cable between combined instrument panel #A4 and fuel level sensor for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.






Continue - Verification

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Checking signal to fuel level sensor








- Ignition on.
- Fuel level sensor disconnected.
Connect a voltmeter between connector terminals 1 and 2 (cable harness side).









The voltmeter should read 6-8 V.

OK - Checking fuel level sensor (removed)

High - Checking for a short-circuit to supply voltage

Low - Checking signal from combined instrument panel

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Checking fuel level sensor (removed)








- Ignition off.
- Remove fuel level sensor according to Replacing sensor Replacing Sensor.
- Hold the fuel level sensor the right way up.
Connect an ohmmeter between terminals 1 and 2 in the fuel level sensor connector.









The ohmmeter should read approximately 325 ohms.

OK - Faulty signal. Intermittent Fault

Not OK - Replacing component

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Replacing component
Try a new fuel level sensor according to Replacing sensor Replacing Sensor.






Continue - Verification

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Checking for a short-circuit to supply voltage
Check cable between combined instrument panel #A5 and fuel level sensor for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.






Continue - Verification

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Checking signal from combined instrument panel












- Ignition off.
- Fuel level sensor disconnected.
- Connect breakout box according to Connecting the breakout box Connecting the Breakout Box.
- Connect combined instrument panel.
- Ignition on.
Connect a voltmeter between #4 (#A4) and #5 (#A5) on the breakout box.









The voltmeter should read 6-8 V.

OK - Checking for an open-circuit

Not OK - Data read-out

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Checking for an open-circuit
Check cable between combined instrument panel #A5 and fuel level sensor for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.






Continue - Verification

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Data read-out
- Disconnect the Volvo Scan Tool (ST) from VIDA.
- Connect the Volvo Scan Tool (ST) to the data link connector (DLC).
Read off all data from the combined instrument panel control module and note values.


Continue - Replacing component

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Replacing component
Try a new connection plate according to: Replacing connection plate Replacing Connection Plate.






Continue - Programming combined instrument panel

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Programming combined instrument panel
Program the control module with the values previously read off the combined instrument panel control module.

Hint: For information see.


Continue - Verification

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Verification

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












- Ignition off.
- Reinstall connectors, components etc.
- Connect combined instrument panel.
- Test drive the car at speeds above 20 kph, alternatively lift up the front suspension safely and remove both front wheels.

Warning! Cars with AWD, test drive the car at speeds higher than 20 kph, alternatively lift up the front and rear suspension safely and remove all wheels.

Note! When the rear wheels are stationary and the front wheels rotate, diagnostic trouble codes (DTCs) may be stored in the ABS system. Erase any diagnostic trouble codes (DTCs) stored in the ABS system after fault-tracing.

Note! Ensure that the front wheels are not rotating when the gear selector is moved.

- Ignition off.
- Disconnect the Volvo Scan Tool (ST) from the VIDA station. Use it as a stand alone tool and connect it to the data link connector (DLC) in the car.
- Ignition on.
Read off the diagnostic trouble code (DTC) counters.





Is counter value greater than 0?

Yes - FAULT FOUND

No - Fault-tracing information

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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 - Exit fault-tracing

No - Attempt New Test


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Faulty signal. Intermittent fault





Faulty signal. Intermittent fault

Checking cables and terminals
Check fuel level sensor for an intermittent open-circuit and an intermittent short-circuit to supply voltage.
Check combined instrument panel connector A and fuel level sensor connector for loose connections according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults and contact resistance and oxidation according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Check cables between combined instrument panel: #A4 and #A5 and fuel level sensor for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults and an intermittent short-circuit to supply voltage according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.














Continue - Fault-tracing information
DONE

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Fault-tracing information




Information

Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.
It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Do you want to view the information again?

Yes - Attempt New Test

No - FAULT FOUND

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