LR3/Disco 3
11
Pollution sensor
supply
Battery voltage
when rear A/C
control panel on. 0V
when panel in sleep
mode
B1B8200,
B1B8300,
B1B7088
99A2
Pollution sensor
and rear A/C
control panel
inoperative
(Discovery 3 only)
Output
Short circuit to
12V
13
Sensor ground
DC voltage similar
to that measured on
C2655-3
B1B6313
None
Poor cabin
temperature control
Output
Open circuit
14
Pollution sensor
HC/CO signal -
Japanese
specification
vehicles only
0.4V to 4.7V, falling
on HC pollution
event
B1B6111
99AA
Inlet flap does not
close in response
to pollution event.
May lead to bad air
quality in cabin
Input
Short circuit to
ground
15
Ambient air
temperature
sensor signal
1.7k ohms. Pull up
resistance 2.15k
ohms
B1A6811
9924
Incorrect ambient
temperature
displayed
Input
Short circuit to
ground
15
Ambient air
temperature
sensor signal
1.7k ohms. Pull up
resistance 2.15k
ohms
B1A6815
9924
Incorrect ambient
temperature
displayed
Input
Open circuit,
short circuit to
5V
16
Humidity sensor
signal
0.7V at 10%, rising
to 3V at 90%
B1A6915
9972
Misted screen in
wet/humid weather
conditions
Input
Open circuit,
short circuit to
battery voltage
16
Humidity sensor
signal
0.7V at 10%, rising
to 3V at 90%
B1A6911
9972
Misted screen in
wet/humid weather
conditions
Input
Short circuit to
ground
17
LH sunlight
sensor signal
0V in darkness/low
light rising to 5V in
bright sunlight.
Should never
exceed 5V (C1629-
13)
B1A6412
9961
Maximum solar
compensation,
blower level too
high
Input
Short circuit to
5V
17
LH sunlight
sensor signal
0V in darkness/low
light rising to 5V in
bright sunlight.
Should never
exceed 5V (C1629-
13)
None
9961
No solar
compensation,
customer too hot in
sunlight
Input
Open circuit,
short circuit to
ground
18
Windshield
heater relay
0V when relay on,
battery voltage
when relay off
None
99A2
Possible battery
loss of charge
Output
Short circuit to
ground
18
Windshield
heater relay
0V when relay on,
battery voltage
when relay off
None
99A2
Windshield may
mist up
Output
Open circuit
19
Washer
jets/exterior
mirrors heater
relay
0V when relay on,
battery voltage
when relay off
None
99A2
None
Output
Short circuit to
ground
19
Washer
jets/exterior
mirrors heater
relay
0V when relay on,
battery voltage
when relay off
None
99A2
Mirrors remain
frosted and washer
jets inoperative in
freezing conditions
Output
Open circuit
20
LIN bus
9600 bps signal
when ATC module
panel on. Average
signal approximately
9V, depending on
battery voltage
None
99A2
Faulty air
distribution and
temperature control
from rear A/C
control panel
(Discovery 3 only)
Input/Output Open circuit
20
LIN bus
9600 bps signal
when ATC module
panel on. Average
signal approximately
None
99A2
Faulty air
distribution and
temperature control
from rear A/C
Input/Output
Short circuit to
ground
