Signal Too High

Signal too high

Checking the function of the fuel pump (FP)




- Ignition on (with additional heater start the engine).

Note! On cars where the heater functions as a parking heater there is no +15 voltage supply to the control module. The heater is activated using the timer stop and start buttons instead of VIDA vehicle communication. Individual components and functions cannot be activated when the +15 voltage supply is absent.

- Activate the heater.
Check the function of the heater according to Test running the additional heater / parking heater Initial Inspection and Diagnostic Overview.





Does the heater operate?

Yes - Intermittent fault

No - Checking components and wiring

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Checking components and wiring

Hint: The fuel pump (FP) is installed in the fuel tank instead of on the heater when the additional heater is also used as a parking heater.

Check the cable between control module terminal #13 and fuel pump (FP) terminal 2. Check for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
The fuel pump (FP) must be replaced if no faults are found in the cable.
Remedy as necessary.

Other information:
- To access the control module or connect the breakout box, see
- To access or reinstall the fuel pump (FP), see Replacing the fuel pump Service and Repair
- With the ignition on and the fuel pump (FP) connector disconnected, the voltage between fuel pump (FP) terminal 2 (control module side) and ground must be 0 V
- For other values, see Signal specification Additional heater 912-D/B Signal Specification Additional Heater 912-D/B.













Continue - Verification

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Verification




Verification

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








- Ignition off
- Reinstall the connectors, components etc.
- Ignition on (with additional heater start the engine).

Note! On cars where the heater functions as a parking heater there is no +15 voltage supply to the control module. The heater is activated using the timer stop and start buttons instead of VIDA vehicle communication. Individual components and functions cannot be activated when the +15 voltage supply is absent.

- Activate the heater.
Check the function of the heater according to Test running the additional heater / parking heater Initial Inspection and Diagnostic Overview.





Does the heater operate?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - FAULT FOUND

VERIFICATION FAILED - 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 the function of the fuel pump (FP)

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Intermittent fault

Hint: The fuel pump (FP) is installed in the fuel tank instead of on the heater when the additional heater is also used as a parking heater.

Check the cable between control module terminal #13 and fuel pump (FP) terminal 2. Check for a short-circuit to supply voltage according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Remedy as necessary.

Other information:
- To access the control module or connect the breakout box, see
- To access or reinstall the fuel pump (FP), see Replacing the fuel pump Service and Repair
- With the ignition on and the fuel pump (FP) connector disconnected, the voltage between fuel pump (FP) terminal 2 (control module side) and ground must be 0 V
- For other values, see Signal specification Additional heater 912-D/B Signal Specification Additional Heater 912-D/B.













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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Attempt New Test - Checking the function of the fuel pump (FP)

FAULT-TRACING FAILED - DONE

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