| | Results of the tests |
| 0 | PRELIMINARY CHECKS | All OK | Problems met | Operation |
|---|
| Check that the heated rear windscreen button in the climate control system control panel is working properlyIn particular, check that the defrosting of both the heated rear windscreen and the rear view mirrors is activated and that the warning light in the button in the climate control system control panel comes on | End of diagnosis | The warning light does not come on | Continue according to the instructions inSee table See table K45 HEATER PLUGS WARNING LIGHT NOT WORKING |
| The defrosting of the heated rear windscreen only is not activated | Continue according to the instructions inSee table See table J21 HEATED REAR WINDSCREEN NOT WORKING |
| The defrosting of the door mirrors only is not activated | Continue according to the instructions inSee table See table J22 DOOR MIRROR DEFROSTING NOT WORKING |
| No defrosting is activated | Continue to Step 1 |
| 1 | HEATED REAR WINDSCREEN RELAY CHECK (POWER CIRCUIT) | All OK | Problems met | Operation |
|---|
| Swap the heated rear windscreen relay (in the junction unit under the dashboard) with the steering column switch unit relay (they are next to one another) and check that the defrosting function is working properly after the swap | Continue to Step 2 | The defrosting function still does not work even after the swap | Continue to Step 3 |
| 2 | REPLACING STEERING COLUMN SWITCH UNIT RELAY (POWER CIRCUIT) | All OK | Problems met | Operation |
|---|
| Replace the steering column switch unit relay (which was actually the one for the rearscreen) and check that the windscreen wipers are working properly | End of diagnosis | . | |
| 3 | HEATED REAR WINDSCREEN RELAY POWER SUPPLY CHECK (POWER CIRCUIT) | All OK | Problems met | Operation |
|---|
| Check that the heated rear windscreen defrosting relay is correctly supplied by the batteryWith the ignition ON, connect to the power supply for the relay from the Body Computer and check that the supply is sent to the relay when the defrosting button is activated.Also check that the electrical connections between the Body Computer, the battery and the relay are not faulty See See E3030 HEATED REAR WINDSCREEN AND DOOR MIRROR DEFROSTING | Do not connect the relay |
| Continue to Step 4 | No supply from battery | Restore the correct supply to the relay. If necessary replace the faulty components (if a fuse is involved, search for the cause of the problem) |
| Supply enablement not provided by the Body Computer | Replace the Body Computer Op. Op. 5505A32 BODY COMPUTER - R R |
| Connections faulty | Restore the correct connections. See See E3030 HEATED REAR WINDSCREEN AND DOOR MIRROR DEFROSTING |
| 4 | DEFROSTING CIRCUIT CHECK | All OK | Problems met | Operation |
|---|
| The problem is due to the simultaneous presence of problems in the rear view mirror and heated rear windscreen circuits Check that the connection to earth is correct and the supply for the mirrors and rearscreen is correctCheck the continuity of the heated rear window and mirrors demisting heating elementCheck the continuity and insulation of the circuit See See E3030 HEATED REAR WINDSCREEN AND DOOR MIRROR DEFROSTING | End of diagnosis | Connections faulty | Restore correct connections. If necessary replace the faulty components (if a fuse is involved, search for the cause of the problem) |
| Breaks in the heated rear windscreen resistances | Replace the mirror reflector Op. Op. 7005R35 DOOR MIRROR REFLECTOR - R R |
| Break in the heated rear windscreen resistance | Replace the heated rear windscreen Op. Op. 7035B14 REAR WINDOW GLASS R R INCLUDES CLEANING OF HOUSING |