|  |  | Results of the tests | 
| 1 | FAN CONTROL CHECK | All OK | Problems met | Operation | 
|---|
|  | Check
the continuity at the passenger compartment air fan control contacts 
 See   E6010  HEATER | Continue to Step 2 | Passenger compartment
air fan control defective. | Replace the control   Op.   5020B22 | 
| 2 | ADJUSTMENT RESISTANCES CHECK | All OK | Problems met | Operation | 
|---|
|  | Check
the continuity of the passenger compartment air fan speed adjustment
resistances   See Test   5040CC  - | Continue to Step 3 | Adjustment resistances
open circuit | Replace the resistance   Op.   5020A44 | 
| 3 | CHECK ELECTRICAL CIRCUIT | All OK | Problems met | Operation | 
|---|
|  | Check
the continuity of the connecting cables between the passenger compartment
air fan control, the adjustment resistances and the fan motor  See   E6010  HEATER | Continue to Step 4 | Connections not correct | Restore connections | 
| 4 | CHECK ON CORRECT OPERATION | All OK | Problems met | Operation | 
|---|
|  | Check
that the fault is no longer present |  | Fault persists | Search for the fault starting from another symptom' |