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Fiat Ulysse Factory Service Manual (2002-2010)22 · Fault diagnosis
22 · Diagnostics

Climate control not heating

Make
Fiat
Model
Ulysse Factory Service Manual
Year
2002–2010
Section
Climate control › Climate control not heating
Fault diagnosisClimate control not heating

CLIMATE CONTROL NOT HEATING

The climate control works properly and sends air to both the left and right sides of the passenger compartments according to the pre-set flows, but this air does not ensure the heating required.

STEPOPERATIONS TO BE CARRIED OUTTEST RESULTS
1CHECK USING DIAGNOSTIC EQUIPMENTALL OKPROBLEMS ENCOUNTEREDACTION

With the (Examiner or other) diagnostic equipment connected, check the following:

  • that there are no faulty control units;
  • no control unit with faulty CAN line
Move on to Step1. Presence of faults1. Continue following the instructions for the diagnostic equipment
2. Climate control system control unit errorMove on to Step
2CHECK USING DIAGNOSTIC EQUIPMENTALL OKPROBLEMS ENCOUNTEREDACTION

Keeping the diagnostic equipment (Examiner or other instruments) connected to the diagnostic socket, check:

  • that there are no faults in the climate control node (NCL)
Move on to Step1. Error detected in the control unit1. Continue following the instructions for the diagnostic equipment
2. No communication with the control unit2. Restore the connection between the climate control system control unit and the diagnostic connector
3ACTIVE DIAGNOSIS WITH DIAGNOSTIC EQUIPMENTALL OKPROBLEMS ENCOUNTEREDACTION
Connect the diagnostic equipment (Examiner or other instruments) and carry out the active diagnosis of the mixing motorsMove on to Stepmixing motor(s) not workingMove on to Step
4ELECTRICAL CIRCUIT CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check the condition of the electrical circuit for the mixing motorsMove on to Step1. Mixing motor(s) electrical circuit faulty

1. Repair the connections

See E6020 AIR CONDITIONING

2. Connections correct, right motor defective

2. Replace the motor

Op. 5040D86 AIR CONDITIONER RIGHT HAND AIR MIXER FLAP CONTROL MOTOR - R R

3. Connections correct, left motor defective

3. Replace the motor

Op. 5040D84 AIR CONDITIONER LEFT HAND AIR MIXER FLAP CONTROL MOTOR - R R

5HEATER HYDRAULIC CIRCUIT CHECKALL OKPROBLEMS ENCOUNTEREDACTION

Check:

  • that there is no air in the heater circuit
  • the seal of the supply and return pipes
Move on to Step1. Air in the circuit1. Bleed the heater circuit
2. No pipe seal2. Renew the seal, if necessary, replace the pipe
6HEATER RADIATOR CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check the efficiency of the heater radiatorMove on to StepRadiator dirty or obstructed

Clean the radiator, if necessary, replace it

Op. 5040C50 AIR CONDITIONER HEATER RADIATOR - R+R

7CHECK ON CORRECT OPERATIONALL OKPROBLEMS ENCOUNTEREDACTION
Check that the fault is no longer present

Parts & tools for this job For 2002 Fiat Ulysse

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