011

Symptom: Parking heater fails to start.

011

Fault symptom

Parking heater fails to start.

Condition

Parking heater activated.

B+ less than 10.2 V.

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 the battery

•	Check battery condition.

•	Start the engine.

•	Check battery voltage at different engine rpm.

•	Red test lead: B+.

•	Black test lead: B-.

•	Voltage should be higher than 10.5 V.

Test results OK?

YES

-	Go to point 3.

NO

-	Go to point 2.

2 Check the component

•	Check the functionality of the generator and regulator. See group 3 Electrical system, ’Components’.

Test results OK?

YES

-	Check the battery. See group 3 Electrical system, ‘Components’.

-	Go to point 5.

NO

-	Repair or replace the faulty component.

-	Go to point 5.

3 Check B+

•	Check voltage at connector B1.

•	Red test lead: Pin 1.

•	Black test lead: Pin 2.

•	B+ should be obtained.

Test results OK?

YES

-	Go to point 4.

NO

-	Check that there is no corrosion or loose contact in the lead between pin 1 in B1 and the fuse.

-	Go to point 4.

4. 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’.