23 · Diagnostics

Fan'' will not work at different speeds

Fault diagnosisFan'' will not work at different speeds

FAN'' WILL NOT WORK AT DIFFERENT SPEEDS

Manual Air Conditioning

The fan does not work when the speed control selector is used.

1	SPEED SELECTOR CHECK	All OK	Problems encountered	Operation
		Results of the tests
	Check that the fan is working at the maximum speed: if it only works at the maximum speed, the resistor should be replaced. Check whether the resistor thermal fuse is broken by measuring the electrical continuity at the thermal fuse securing points.	Move on to Step 2	Failed operation of speed selector	Replace the ceramic resistor
2	CHECK ON CORRECT OPERATION OF FAN	All OK	Problems encountered	Operation
	Check for loose connections in the electrical wiring. Disconnect/reconnect the connection to the engine support. Check that it rotates at all speeds by activating them using the switch. If it does not rotate at the maximum speed, check the vehicle fuse. If the defect persists, before replacing it, provide a direct battery supply and check that it rotates at maximum speed.	End of diagnosis	Electrical connections loose	Renew the electrical connections
		End of diagnosis	Fan not working	Replace the fan Op. 5040C30 FAN MOTOR - R+R

Automatic Air Conditioning

The fan does not work when the speed control selector is used.

1	CHECK ON OPERATION OF FAN BY CLIMATE CONTROL SYSTEM CONTROL UNIT	All OK	Problems encountered	Operation
		Results of the tests
	With the engine started, set the climate control system control unit in the AUTO position, adjust the temperature to 22 °C, position the recirculation to outside air intake and the distribution to the front position. Adjust the fan button (+ side) gradually increasing the speed set and then decreasing the speed using the (- side) button and check the effect on the variation of the air flow rate	End of diagnosis	The fan does not work	Move on to Step 2
2	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Connect the diagnostic equipment and check: that there are no errors at the passenger compartment fan that there are no errors linked to the fan (short circuit errors)	End of diagnosis	Error at the passenger compartment fan.	Move on to Step 3
		End of diagnosis	Short circuit error	Move on to Step 3
3	CHECK ON CORRECT OPERATION OF FAN	All OK	Problems encountered	Operation
	Check whether the electrical wiring connections are loose: disconnect/reconnect the connection to the engine mounting. Repeat the checks using the Examiner and check whether the fan error reoccurs. Carry out the tests described in Test 5040CE in order See Test 5040C AIR CONDITIONER BOX AND COMPONENTS	End of diagnosis	Malfunction of the regulator built into the fan motor support	Replace the fan motor support

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