22 · Diagnostics

Climate control recirculation not working

Fault diagnosisClimate control recirculation not working

CLIMATE CONTROL RECIRCULATION NOT WORKING

The climate control recirculation does not work in any conditions (manual/automatic)

STEP	OPERATIONS TO BE CARRIED OUT	TEST RESULTS
1	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket. Check:That there are no errors in the climate control node (NCL)	Move on to Step	1. Error in the control unit.	1. Check the NCL supply connections. Move on to Step
			2. Recirculation motor error.	Move on to Step
			3. No communication with the NBC.	3. Restore the connection between the climate control node (NCL) and the NBC See E6020 AIR CONDITIONING
2	ACTIVE DIAGNOSIS WITH DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect the diagnostic equipment (Examiner or other instruments) and carry out the active diagnosis for the recirculation motor.	Move on to Step	Recirculation system stuck.	Move on to Step
3	MOTOR ELECTRICAL CIRCUIT CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the recirculation motor electrical circuit See E6020 AIR CONDITIONING	Move on to Step	Recirculation motor connection faulty	Restore the correct connection See E6020 AIR CONDITIONING
4	ASSEMBLY MECHANICAL SECTION CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the recirculation flap moves freely.	Move on to Step	Recirculation flap mechanical section faulty.	Repair/replace the defective parts.
5	CHECK ON CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present.		Fault persists	Replace the Climate control system node (NCL)

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