| STEP | OPERATIONS TO BE CARRIED OUT | TEST RESULTS |
|---|
| 0 | PRELIMINARY CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Check:- condition of climate control system fuses (Wiring Diagram ) E6020 AIR CONDITIONING
- Correct climate control system pressure
| Move on to Step | 1. Fuses blown. | 1. Change the blown fuses. |
| 2. Pressure not correct | 2. Eliminate leaks and top up climate control system to correct level See in Op. 5040A10 Air conditioning coolant circuit - Drying and Repressurizing |
| 1 | CHECK USING DIAGNOSTIC EQUIPMENT | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| With the tester (Examiner or other instrument) connected, check the CAN network information for:- no control unit not activated;
- that there are no faulty control units;
- no control unit with faulty CAN line;
| Move on to Step | Presence of faults | Continue following the instructions for the diagnostic equipment |
| 2 | CHECK USING DIAGNOSTIC EQUIPMENT | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Keeping the diagnostic equipment (Examiner or other instruments) connected to the diagnostic socket, check:- that there are no faults in the climate control system node
| Move on to Step | 1. Presence of faults | 1. Continue following the instructions for the diagnostic equpiment |
| 2. No dialogue with the control unit | Move on to Step |
| 3 | CHECK CONTINUITY | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Check:- continuity of serial line K (Wiring Diagram ) E6020 AIR CONDITIONING
| Move on to Step | Connections not correct | Restore the connections (Wiring Diagram ) E6020 AIR CONDITIONING |
| 4 | CHECK ON CORRECT OPERATION | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Check that the fault is no longer present | | Fault persists | Replace the climate control system control unit See in Op. 5040D18 Air conditioning CONTROL UNIT - R.R. |