| | Results of the tests |
| 0 | PRELIMINARY CHECKS | All OK | Problems met | Operation |
|---|
| Check the condition of the compressor drive belt | Continue to Step 1 | Tension incorrect | Replace the belt Op. Op. 1092G10 SINGLE ENGINE BELT R R |
| Deteriorated belt. | Replace the belt Op. Op. 1092G10 SINGLE ENGINE BELT R R |
| 1 | CHECK WITH DIAGNOSTIC EQUIPMENT | All OK | Problems met | Operation |
|---|
| Connect the diagnostic equipment (Examiner) to the diagnostic socket.Check that there are no fault in the engine management control unit.Check that there are no faults in the climate control control unit | Continue to Step 2 | An error is detected in the control unit | Continue following the instructions for the diagnostic equipment |
| An error is detected in climate control unit | Continue following the instructions for the diagnostic equipment |
| Lack of communication with the climate control system control unit (CAN line error) | Restore connection between climate control system control unit and body computer connector See See E6020 AIR CONDITIONING |
| 2 | ACTIVE DIAGNOSIS WITH DIAGNOSTIC EQUIPMENT | All OK | Problems met | Operation |
|---|
| Using the diagnostic equipment (Examiner) connected to the engine management node, carry out active diagnosis on the operation of the compressor engagement relay | Continue to Step 3 | Compressor engagement relay faulty | Replace the relay |
| Connections not correct | Restore the connection between engine management control unit, relay and compressor coupling See See E6021 COMPRESSOR ENGAGEMENT |
| 3 | CHECK COMPRESSOR ACTIVATION ELECTRICAL CIRCUIT | All OK | Problems met | Operation |
|---|
| Check the operation of the compressor electro-magnet coupling. | Continue to Step 4 | Connections not correct | Restore the connections between the climate control unit, pressure switch and control unit See See E6021 COMPRESSOR ENGAGEMENT |
| Pressure switch defective | Replace the pressure switch Op. Op. 5040B14 AIR CONDITIONER SYSTEM MULTI-LEVEL PRESSURE SWITCH - R+R |
| 4 | CHECK COMPRESSOR ELECTRO-MAGNET COUPLING | All OK | Problems met | Operation |
|---|
| Check, in order: - Compressor activation control
- 4 stage pressure switch
- Connection between compressor activation relay and the control.
| Continue to Step 5 | Defective compressor coupling. | Replace the compressor complete with coupling Op. Op. 5040A34 PULLEY WITH COMPRESSOR ELECTROMAGNETIC COUPLING - R+R WITH COMPRESSOR REMOVED |
| 5 | CHECKING SYSTEM PRESSURE | All OK | Problems met | Operation |
|---|
| Check the system pressures | Continue to Step 6 | High pressure does not increase or low pressure decreases too much: leaks in the circuit | Locate the leaks and restore the correct operation. |
| High pressure continues to rise: the compressor cooling fan does not intervene | If the fault is associated with that of excessive engine heating, proceed as described inSee table See table K25 ENGINE COOLANT TEMPERATURE GAUGE NOT WORKING |
| 6 | CHECKING EVAPORATOR | All OK | Problems met | Operation |
|---|
| 1.9 JTD 16VTwo-zone climate control system | Check high and low pressure pipe for leaks, and condition of evaporator | Continue to Step 7 | Pipe from condenser to drier filter damaged | Replace the pipe Op. 5040A52 |
| Evaporator dirty | Replace the evaporator Op. Op. 5040C64 A/C MANUAL CONTROL SWITCH (ONE) - R+R |
| 2.0 JTS3.2 V6Two-zone climate control system | Check high and low pressure pipe for leaks, and condition of evaporator | Continue to Step 7 | Pipe from compressor to condenser damaged | Replace the pipe Op. Op. 5040A50 PIPE FROM COMPRESSOR TO AIR CONDITIONER CONDENSER - R+R |
| Pipe from condenser to filter damaged | Replace the pipe Op. 5040A52 |
| Pipe from filter to evaporator damaged | Replace the pipe Op. 5040A56 |
| Evaporator dirty | Replace the evaporator Op. Op. 5040C64 A/C MANUAL CONTROL SWITCH (ONE) - R+R |
| 7 | CHECK ON CORRECT OPERATION | All OK | Problems met | Operation |
|---|
| Check that the fault is no longer present | End of diagnosis | . | |
