| Test | Work order description | Nominal value |
| T01 | Check: trouble code stored | |
| Is one of the following trouble codes set? | |
| 51 CONTROL UNIT REPLACE | ECC NO TROUBLE CODES |
| 55 CONTROL UNIT REPLACE | |
| Yes: E01 | No: T02 |
| T03 | Check: trouble code stored | |
| Is the following trouble code set? | |
| 10 PASSENGER COMPARTMENT TEMPERATURE VOLTAGE SENSOR LOW | ECC NO TROUBLE CODES |
| 11 PASSENGER COMPARTMENT TEMPERATURE VOLTAGE SENSOR HIGH | |
| Yes: E02 | No: T03 |
| T03 | Check: trouble code stored | |
| is the following trouble code set? | |
| 52 VARIANT CODE NOT PROG� RAMMED | ECC NO TROUBLE CODES |
| Yes: T04 | No: E03 |
| T04 | Program control unit | |
| Select under mode F7: programming | |
| Confirm current control unit after checking with YES | |
| Select with driver's side arrow button and conform with YES | LEFT or RIGHT |
| Select unit system with arrow button and confirm with YES | SI UNITS or USA UNITS |
| Select recirculating air timer with arrow button and confirm with YES | EUROPE or JAPAN |
| Select heater circuit valve with arrow button and confirm with YES | PRESENT or NOT PRESENT |
| Enter control unit index code and confirm with ENTER | 001 for saloon 002 for estate |
| Does the following signal appear on the display?: | |
| EEC SUCCESSFULLY PROGRAMMED | PROGRAMMING SUCCESSFUL |
| Ignition OFF | |
| Ignition ON | |
| Yes: T05 | No: E04 |
| T05 | Check status of heater circuit valve | |
| F0 Select data list Test T01 | |
| Ignition ON | |
| Appears on diagnostic tester | |
| PRESENT or NOT PRESENT | in vehicles with petrol engines: PRESENT in vehicles with diesel engines: NOT PRESENT |
| Yes: T06 | No: E05 |
| T06 | Check status of driver's side | |
| F0 Select data list Test T02 | |
| Ignition ON | |
| Appears on diagnostic tester | |
| LEFT or RIGHT | with LHD: LEFT with RHD: RIGHT |
| Yes: T07 | No: E06 |
| T07 | Check function of AUTO button | |
| F0 Select data list Test T03 | |
| Ignition ON | INACTIVE |
| Briefly actuate button (AUTO) | ACTIVE |
| Yes: T08 | No: E07 |
| T08 | Check function of OFF button | |
| F0 Select data list Test T04 | |
| Ignition ON | INACTIVE |
| Briefly actuate button (OFF) | ACTIVE |
| Yes: T09 | No: E08 |
| T09 | Check function of passenger compartment temperature sensor | |
| F0 Select data list Test T05 | |
| Ignition ON | -20 ... 70� C or -4...158� F |
| Yes: T10 | No: E09 |
| T10 | Check function of defroster button | |
| F0 Select data list Test T06 | |
| Ignition ON | INACTIVE |
| Actuate button (defroster) | ACTIVE |
| Yes: T11 | No: E10 |
| T11 | Check function of footwell defroster/ventilator | |
| F0 Select data list Test T07 | |
| Ignition ON | INACTIVE |
| Actuate button (footwell defroster/ventilator) | ACTIVE |
| Yes: T12 | No: E11 |
| T12 | Check function of footwell ventilator | |
| F0 Select data list Test T08 | |
| Ignition ON | INACTIVE |
| Actuate button (footwell ventilator) | ACTIVE |
| Yes: T13 | No: E12 |
| T13 | Check function of passenger compartment ventilator | |
| F0 Select data list Test T09 | |
| Ignition ON | INACTIVE |
| Actuate button (passenger compartment ventilator) | ACTIVE |
| Yes: T14 | No: E13 |
| T14 | Check function of passenger compartment/footwell ventilator | |
| F0 Select data list Test T10 | |
| Ignition ON | INACTIVE |
| Actuate button (passenger compartment/footwell ventilator) | ACTIVE |
| Yes: T15 | No: E14 |
| T15 | Check function of fan power increase | |
| F0 Select data list Test T11 | |
| Ignition ON | INACTIVE |
| Actuate button (fan power increase) | ACTIVE |
| Yes: T16 | No: E15 |
| T16 | Check function of fan power decrease | |
| F0 Select data list Test T12 | |
| Ignition ON | INACTIVE |
| Actuate button (fan power decrease) | ACTIVE |
| Yes: T17 | No: E16 |
| T17 | Check function of left nominal temperature increase | |
| F0 Select data list Test T13 | |
| Ignition ON | INACTIVE |
| Actuate button (left nominal temperature increase) | ACTIVE |
| Yes: T18 | No: E17 |
| T18 | Check function of left nominal temperature decrease | |
| F0 Select data list Test T14 | |
| Ignition ON | INACTIVE |
| Actuate button (left nominal temperature decrease) | ACTIVE |
| Yes: T19 | No: E18 |
| T19 | Check function of right nominal temperature increase | |
| F0 Select data list Test T15 | |
| Ignition ON | INACTIVE |
| Actuate button (right nominal temperature increase) | ACTIVE |
| Yes: T20 | No: E19 |
| T20 | Check function of right nominal temperature decrease | |
| F0 Select data list Test T16 | |
| Ignition ON | INACTIVE |
| Actuate button (right nominal temperature decrease) | ACTIVE |
| Yes: E21 | No: E20 |
