Substitute Programmed Values For Ihka Component Inputs; Temperature Sensor Resistance Values At 25°C (77°F) - BMW 1999-2005 M3 Service Manual

Heating and Air Conditioning
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programmed substitute value. See
Table a.
Table a. Substitute programmed
values for IHKA component inputs
Input Working
range
Heat 5° to
exchanger 124°C
sensor (41° to
255°F)
Evaporator -10° to
sensor 30°C (14°
to 86°F)
Interior 10° to
temperature 40°C (50°
sensor to 104°F)
Exterior K-bus
temperature
Coolant K -bus
temperature
Specified 16° to
temperature 32°C (61°
to 90°F)
Note:
The substitute value for the evaporator
temperature sensor is below the A/C
compressor cycling temperature
(2°C/34°F). If the evaporator temperature
sensor signal is not plausible, the
substitute value will switch the A/C OFF.
Table b lists resistance values and
fault limits for IHKA temperature sensors.
Table b. Temperature sensor
resistance values at 25°C (77°F)
Sensor Resistance
Heater core 9 k
Substitute
value
55°C
(131°F)
0°C (32°F)
20°C (68°F)
0°C (32°F)
100°C
(212°F)
22°C (72°F)
Fault
limit
± 2% Temp >
2/25/2009 11:16 PM