Passenger side temperature adjustment does not work

Make: Fiat
Model: Panda Factory Service Manual
Year: 2003–2012
Section: Climate control › Passenger side temperature adjustment does not work

‹ Prev Climate control recirculation automatic mode not working Next › Air preheating is not activated with low external temperature

Fault diagnosisPassenger side temperature adjustment does not work

PASSENGER SIDE TEMPERATURE ADJUSTMENT DOES NOT WORK

When the desired passenger side temperature is set, there is no corresponding flow of air at the required temperature.

1	CHECK ON CORRECT OPERATION OF CLIMATE CONTROL NODE	All OK	Problems encountered	Operation
		Results of the tests
	With the engine on and the compressor off, place the control unit in the AUTO function (MONO button off) and adjust the temperature using the passenger side temperature knob moving it from cold to hot. Also select the recirculation button to the closed position and set the fan speed to 3-4 bars (display) and the distribution to front ventilation. Using the diagnostic equipment check that the engine temperature reaches at least 70 °C. Now carry out the operations for checking the passenger compartment cooling function: with the engine on, at ambient temperature of around 20 °C, with the vehicle compressor on, place the control unit to AUTO, adjust the temperature knob from hot to maximum cold LO, the distribution to the front position, the fan speed to 3 bars and the outside air intake function. After about 5 minutes in these conditions, check using the diagnostic equipment that the temperature values for the passenger compartment and evaporator sensors show a decrease: from the initial temperature of about 20 °C (ambient temperature) gradually decreasing to a temperature of around 3.5°C for the evaporator sensor and around 6 °C for the passenger compartment temperature sensor. Feel whether the air coming out of the vents changes (getting colder) in temperature. Then check for any errors relating to the solar sensor. The solar sensor reference values are less than 50 W/mq. a maximum difference between the driver and passenger selections of 7°C is permitted.	End of diagnosis	The temperature of the air coming out of the vents does not get hotter	Move on to Step 2
		End of diagnosis	The temperature of the air coming out of the vents does not get colder	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 side air mixture actuator that there are no faults in the outside temperature sensor that there are no faults in the passenger compartment temperature sensors that there are no faults in the solar sensor	Move on to Step 3	Short circuit error at the air mixture actuator	Move on to Step 4
			Implausible error at the air mixture actuator	Replace the actuator Op. 5040D86 AIR CONDITIONING RIGHT HAND AIR MIXER FLAP CONTROL MOTOR - R.R
			Error at the outside temperature sensor	Move on to Step 4
			Error at the passenger compartment temperature sensors	Move on to Step 4
			Error at the solar sensor	Move on to Step 4
3	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Keeping the Examiner diagnostic equipment connected, check the operation of the air mixture actuator through active diagnosis	Move on to Step 4	Air mixture actuator not working	Replace the actuator Op. 5040D86 AIR CONDITIONING RIGHT HAND AIR MIXER FLAP CONTROL MOTOR - R.R
4	ELECTRICAL CIRCUIT CHECK	All OK	Problems encountered	Operation
	Check the continuity/insulation of the electrical connection between the climate control node and the passenger side air mixture actuator and the outside temperature sensor and the passenger compartment sensor and the solar sensor	Move on to Step 5	Electrical connection broken or not insulated.	Restore the continuity/insulation of the electrical connection See E6020 CONDIZIONATORE
			Outside temperature sensor not working	Replace the outside temperature sensor Op. 5010D12 OUTSIDE AIR TEMPERATURE SENSOR ON DOOR MIRROR - R+R FOLLOWING ELECTRICAL CIRCUIT CHECK
			Passenger compartment sensors not working	Replace the passenger compartment temperature sensors
			Solar sensor not working	Replace the solar sensor Op. 5010D56 SOLAR SENSOR - R.R FOLLOWING ELECTRICAL SYSTEM CHECK
5	AIR MIXTURE MOTOR FLAP CHECK	All OK	Problems encountered	Operation
	Check that the air mixture motor flap completes its travel without any hinderance	End of diagnosis	Flap obstructed or damaged	Remove the air mixture actuator flap impediment or replace the flap, if damaged.

‹ Prev Climate control recirculation automatic mode not working Next › Air preheating is not activated with low external temperature

Parts & tools for this job For 2003 Fiat Panda

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