Signal Too Low. Permanent Fault

Signal too low. Permanent fault

Checking fuse 11C/33 (15A)




- Ignition off.
Check that fuse 11C/33 (15A) is intact.

Other information
- For further information about the fuses and relays, see the Wiring Diagram.









Is the fuse intact?

Yes - Checking the signal cable

No - Checking the signal cable

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Checking the signal cable




- Ignition off
- Remove fuel pump relay 2/23 from the central electronic module (CEM) base.
Check the signal cables between fuse 11C/33 terminal #2 and fuel pump relay 2/23 terminal #3. Check for an open-circuit.
Remedy as necessary.

Other information:
- To access or replace the central electronic module (CEM) connector, see Central electronic module (CEM), replacing Central Electronic Module (CEM), Replacing
- For further information about the fuses and relays, see the Wiring Diagram
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM)
- For information about signals, see Signal specification Pinout Values and Diagnostic Parameters
- Checking wiring and terminals Checking Wiring And Terminals.













Is the signal cable OK?

Yes - Replacing the component

No - Verification

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Checking the signal cable




- Ignition off
- Remove fuel pump relay 2/23 from the central electronic module (CEM) base.
Check the signal cables between fuse 11C/33 terminal #2 and fuel pump relay terminal #3. Check for a short-circuit to ground.
Remedy as necessary.

Other information:
- To access or replace the central electronic module (CEM) connector, see Central electronic module (CEM), replacing Central Electronic Module (CEM), Replacing
- For further information about the fuses and relays, see the Wiring Diagram
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM)
- For information about signals, see Signal specification Pinout Values and Diagnostic Parameters
- Checking wiring and terminals Checking Wiring And Terminals.













Is the signal cable OK?

Yes - Replacing the component

No - Replacing the component

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Replacing the component
Replace fuse 11/C33 (15A).

Other information
- For further information about the fuses and relays, see the Wiring Diagram.


Continue - Verification

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Replacing the component
Try replacing fuel pump relay 2/23.

Other information
- To access and replace the relay, see Central electronic module (CEM), replacing Central Electronic Module (CEM), Replacing


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.
- Connect the connectors, install the components, etc.
- Ignition on.
Check that diagnostic trouble code status changes from permanent to intermittent.





Is the diagnostic trouble code status intermittent?

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 - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - No Fault Found

Attempt New Test - Checking fuse 11C/33 (15A)

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