Climate control not working / under no circumstances
- Make
- Fiat
- Model
- Ulysse Factory Service Manual
- Year
- 2002–2010
- Section
- Climate control › Climate control not working / under no circumstances
CLIMATE CONTROL NOT WORKING / UNDER NO CIRCUMSTANCES
The climate control system will not work when the controls are operated.
The climate control only works with the engine running.
The nodes involved in the operation of the climate control are: NCL - NBC - NDVM - NCM
The networks go on stand-by 30 mins after the engine is switched off. This makes it impossible to carry out the fault diagnosis. If a diagnostic session has to be opened, start up the engine to reawaken the networks.
| 1 | CHECK USING DIAGNOSTIC EQUIPMENT | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|---|---|---|---|
Check the following with the EXAMINER connected to the NCM node is the errors ambient:
| Move on to Step | 1. Climate control system pressure error. | Move on to Step | |
| 2. Air conditioning control error | 2. CAN check.Move on to Step | |||
| 2 | CHECK USING DIAGNOSTIC EQUIPMENT | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
| Check the following at the Body Computer Node (NBC):In active diagnosis ambient - Compressor engagement.In errors ambient - that there are no errors. | Move on to Step | 1. Compressor does not switch on. | 1. Check connection between compressor coupling and NDVM. | |
| 2. Climate control compressor error | Move on to Step | |||
| 3 | CHECK USING DIAGNOSTIC EQUIPMENT | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
Check:
| Move on to Step | 1. Presence of faults | 1. Continue following the instructions for the diagnostic equipment | |
| 2. No communication with the control unit | Move on to Step | |||
| 4 | CHECK CONTINUITY | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
Check:
| Move on to Step | Connections not correct. | Restore the connections | |
| 5 | COMPRESSOR ENGAGEMENT CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
Check that the compressor switches on correcly by See Test 5040BC CLIMATE CONTROL COMPRESSOR LINEAR SENSOR ON/OFF CHECK | Move on to Step | Compressor does not switch on | Move on to Step | |
| 6 | CHECK ON CORRECT OPERATION | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
| Check the compressor coupling continuity and insulation using a multimeter. | Move on to Step | Compressor coupling defective. | Replace the compressor | |
| 7 | CHECK ON CORRECT OPERATION | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
| Check that the fault is no longer present | Fault persists | Replace the linear sensor | ||
| 8 | CHECK ON CORRECT OPERATION | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
| Check that the fault is no longer present | Fault persists | Replace the climate control node (NCL) |
Parts & tools for this job For 2002 Fiat Ulysse
- TOOLA/C manifold gauge setSearch: AC manifold gauge set
- TOOLUV leak detection kitSearch: AC UV leak detection kit
- PARTCabin filterSearch: Fiat Ulysse 2002 cabin filter
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