SELF-DIAGNOSTIC SYSTEM
Note. A/C control unit is capable of storing intermittent or permanent defects in memory. Diagnosis of such defects can be found using BMW Service Tester (Sun 2013 Engine Analyzer) and applicable BMW diagnostic software. See FAULT CODE IDENTIFICATION .
DIAGNOSTIC TROUBLE CODE DEFINITIONS
| Fault Codes | Affected Circuit | Probable Cause Or Defect |
|---|---|---|
| 01 | Right Temperature Control Knob | Voltage Supply, Wire Or Control Knob |
| 04 | Right Heater Sensor | Voltage Supply, Wire Or Right Heater Sensor |
| 07 | Evaporator Temperature Sensor | Voltage Supply, Wire Or Evaporator Temperature Sensor |
| 10 | Outside Temperature Sensor | Voltage Supply, Wire Or Outside Temperature Sensor |
| 13 | Interior Temperature Sensor | Voltage Supply, Wire Or Interior Temperature Sensor |
| 16 | Interior Blower Sensor | Wire Or Interior Blower Sensor |
| 25 | Left Temperature Control Knob | Voltage Supply, Wire Or Control Knob |
| 28 | Left Heater Sensor | Voltage Supply, Wire Or Left Heater Sensor |
| 31 | Blower Control Knob | Voltage Supply, Wire Or Control Knob |
| 34 | Air Distribution Control Knob | Voltage Supply, Wire Or Mixing Air Control Knob |
| 40 | Left Water Valve | Wire, Operating Unit Or Left Water Valve |
| 44 | A/C Compressor Reference Signal | Wire, (1) DME Control Unit Or Fan Relay |
| 46 | Right Water Valve | Wire, Operating Unit Or Right Water Valve |
| 47 | A/C Signal To (1) DME | Wire Or Decoupling Relay |
| 48 | Rear Window Relay | Wire Or Rear Window Defogger Relay |
| 52 | Fresh Air Flap Motor | Voltage Supply, Wire Or Fresh Air Flap Motor |
| 55 | Air Recirculation Flap Motor | Voltage Supply, Wire Or Air Recirculation Flap Motor |
| 61 | Mixing Air Flap Motor | Voltage Supply, Wire Or Mixing Air Flap Motor |
| 92 | Terminal No. 50 | Wire |
| 94 | Independent Heating & Ventilation | Wire Or Relay Box |
| (1) Digital Motor Electronics (DME). | ||
| (1) | Digital Motor Electronics (DME). |
FAULT CODE IDENTIFICATION