Checking Tachometer

Checking tachometer




- Start engine.
- Go into rolling values.
Read off engine speed (RPM) at different engine speeds and compare with tachometer.





Do engine speed (RPM) and tachometer agree?

Yes - Troubleshooting procedure complete

No - Checking programmed engine speed (RPM) for tachometer

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Checking programmed engine speed (RPM) for tachometer




- Read off and note maximum tachometer engine speed (RPM).
- Disconnect the Scan Tool (ST) from the VIDA station.
- Connect Volvo Scan Tool (ST) to data link connector (DLC).
- Ignition on.
- Go into "read combi" under "program combi".
- Read off maximum tachometer engine speed (RPM).





Does programmed engine speed (RPM) agree with maximum engine speed (RPM)?

Yes - Replacing component

No - Programming combined instrument panel

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Replacing component
Try a new gauge according to Replacing tachometer, temperature gauge, fuel gauge and speedometer Replacing Tachometer, Temperature Gauge, Fuel Gauge and Speedometer.

Continue - Verification

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Programming combined instrument panel
Program maximum tachometer engine speed (RPM) in the combined instrument panel.

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.
- Disconnect the Volvo Scan Tool (ST) from the data link connector (DLC).
- Connect Volvo Scan Tool (ST) to the VIDA station.
- Reinstall connectors, components etc.
- Start engine.
- Go into rolling values.
Read off engine speed (RPM) at different engine speeds and compare with tachometer.





Do engine speed (RPM) and tachometer agree?

Yes - Fault has been remedied

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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Attempt New Test - Checking tachometer

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