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

Climate control not cooling

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

CLIMATE CONTROL NOT COOLING

The compressor comes on, the fan works normally and sends air to the passenger compartment according to the pre-set flows bu the air remains at the outside temperature and is not cooled.

The enablement of the engagement of the refrigerant circuit is controlled by both the climate control system control unit and the engine management control unit. Therefore if the climate control system is not cooling in certain conditions, this is correct.

STEPOPERATIONS TO BE CARRIED OUTTEST RESULTS
0PRELIMINARY CHECKSALL OKPROBLEMS ENCOUNTEREDACTION

Check the condition of the compressor drive beltCheck the system pressure

See Test 5040B SYSTEM SAFETY CHECK DEVICES

Move on to Step1. Belt deteriorated or broken1. Replace the belt
2. Gas pressure does not conform.

2. Eliminate leaks and top up climate control system to correct level

Op. 5040A10 EXPANSION/CONNECTION PIPE - R R

1CHECK USING DIAGNOSTIC EQUIPMENTALL OKPROBLEMS ENCOUNTEREDACTION

Check the following using the Examiner diagnostic equipment:

  • Presence of errors at the climate control node (NCL)
  • Presence of errors at the engine management node (NCM)
  • Presence of errors at the Body Computer (NBC)
  • Presence of errors at the VAN CONFORT network
  • Presence of errors at the VAN CAR network
Move on to Step1. Presence of errors at the engine management node.Move on to Step
2. Presence of errors at the climate control nodeMove on to Step
3. Presence of errors at the Body computer.Move on to Step
4. Presence of errors at the VAN CONFORT network.Move on to Step
2CHECK USING DIAGNOSTIC EQUIPMENTALL OKPROBLEMS ENCOUNTEREDACTION
  • Parameter plausibility
Move on to Step1. Errors present1. Continue following the instructions for the diagnostic equipment
2. Parameters not plausible2. Continue following the instructions for the diagnostic equipment
3. No communication between climate control system control unit

3. Restore connection between the climate control unit and diagnostic connector

See E6020 AIR CONDITIONING

3CHECK USING DIAGNOSTIC EQUIPMENTALL OKPROBLEMS ENCOUNTEREDACTION

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

  • Presence of errors at the climate control node (NCL).
  • Parameter plausibility
Move on to Step1. Presence of faults1. Continue following the instructions for the diagnostic equipment
2. Parameters not plausible2. Continue following the instructions for the diagnostic equipment
3. Climate control circuit pressure not correctMove on to Step
4. No dialogue with the engine management control unit

4. Restore connection between the climate control unit and diagnostic connector

See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT

Parts & tools for this job For 2002 Fiat Ulysse

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