Signal Too High

Signal too high

Checking the function of the fuel pump (FP)








- Ignition on.

Note! It is important that only the ignition is on in order for the heater to start.

- Activate the heater.
A buzzing sound should be heard from the heater.
Check the function of the heater. See Engine coolant heater, test running Engine Coolant Heater, Test Running.

Other information:
- For a description of parameters, see Description of parameters Description of Parameters
- For a description of activations, see Activating components/functions Activating Components/Functions.





Does the heater operate?

Yes - Intermittent fault

No - Checking components and wiring

-------------------------------------------------

Checking components and wiring
Check the cable between control module terminal #13 and fuel pump (FP) terminal 2. Check for a short-circuit to supply voltage.
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 Connecting the breakout box Connecting the Breakout Box
- To access or replace the fuel pump (FP), see Fuel pump auxiliary heater, replacing 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 Signal Specification
- Checking wiring and terminals Checking Wiring And Terminals.














Continue - Verification

-------------------------------------------------

Verification




Verification

Verification

Hint: After the repair it is necessary to check that the fault has been rectified.








- Ignition off.
- Connect connector, install components etc.
- Ignition on.

Note! It is important that only the ignition is on for the heater to start up.

- Activate the heater.
A buzzing sound should be heard from the heater.
Check the function of the heater as described in Engine coolant heater, test running Engine Coolant Heater, Test Running.

Additional information:
- For a description of the parameters, see Description of parameters Description of Parameters.
- For a description of activations, see Activating components/functions Activating Components/Functions.





Does the heater work?

Yes - VERIFIED

No - VERIFICATION FAILEDPAPER

------------------------

VERIFIED - Fault Found

VERIFICATION FAILED - Fault-tracing information

PAPER - No Fault Found

-------------------------------------------------

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

------------------------

FAULT-TRACING FAILED - FAULT-TRACING FAILED

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

-------------------------------------------------

Intermittent fault
Check the cable between control module terminal #13 and fuel pump (FP) terminal 2. Check for a short-circuit to supply voltage.
Remedy as necessary.

Other information:
- To access the control module or connect the breakout box, see Connecting the breakout box Connecting the Breakout Box
- To access or replace the fuel pump (FP), see Fuel pump auxiliary heater, replacing 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 Signal Specification
- Checking wiring and terminals Checking Wiring And Terminals














Continue - Fault-tracing information
DONE

-------------------------------------------------

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

------------------------

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

FAULT-TRACING FAILED - DONE

FAULT FOUND - Fault Found

-------------------------------------------------