Sooting combustion

Symptom: Sooting combustion.

Sooting combustion

Fault symptom

Sooting combustion.

Condition

Parking heater activated.

Diagnostic help

Parking heater can be activated with Tech 2.

Parking heater function can be programmed in SID.

Eberspächer diagnostics instrument used for diagnosis.

Diagnostic procedure

1. Check exhaust and intake hoses

•	Check that the exhaust and intake hoses are not clogged.

Test results OK?

YES

-	Go to point 2.

NO

-	Repair or replace the hose or hoses concerned.

-	Go to point 3.

2. Check fuel pump capacity

•	Check that the battery is sufficiently charged (11-13 V).

•	Lower the heater to gain access to its fuel line.

•	Detach the fuel line from the heater.

•	Place the end of the fuel line in a measuring flask.

•	Contact SID.

•	Activate parking heater (ON).

•	If fuel flows out at a constant rate, about 40 seconds after activation, the fuel line is filled and bled.

•	Empty the measuring flask.

•	Activate parking heater (ON).

•	The fuel pump is activated for about 90 seconds.

•	Check the amount of fuel in the measuring flask.

•	It should be 9.3-10.7 cm 3 /90 s.

Test results OK?

YES

-	Connect Eberspächer diagnostics instrument.

-	Activate Eberspächer diagnostics instrument (D).

-	Make a note of all diagnostic trouble codes.

-	Deal with the diagnostic trouble codes generated as described in the diagnostic procedure for each of them.

-	Go to point 3.

NO

-	Change the fuel pump.

-	Go to point 3.

3. Final check

•	Clear the diagnostic trouble codes in all systems.

•	Contact SID.

•	Activate parking heater (ON).

•	Perform a functionality check.

•	Evaluate the functionality check.

•	Check that the diagnostic trouble code has not recurred.

Test results OK?

YES

-	Fault rectified successfully.

NO

-	See ’Before changing a control module’.