LR3/Disco 3
Automatic Temperature Control (ATC) Module - C2295
Cavity
Description
Typical Condition -
No fault
DTC
PID
Symptom
Input/Output Possible Cause
1
Power supply to
ATC module - LH
seat
Battery voltage via
fuse 7
None
None
None
Input
Short circuit high
1
Power supply to
ATC module - LH
seat
Battery voltage via
fuse 7
None
None
LH seat heater
inoperative
Input
Open circuit (fuse
blows) or short
circuit to ground
2
Power supply to
ATC module - RH
seat
Battery voltage via
fuse 7
None
None
None
Input
Short circuit high
2
Power supply to
ATC module - RH
seat
Battery voltage via
fuse 7
None
None
RH seat heater
inoperative
Input
Open circuit (fuse
blows) or short
circuit to ground
3
Power supply to
LH seat heater
Ignition switch feed
B1A7318
99A2,
99A6
LH seat heater
inoperative
Output
Open circuit (fuse
blows), short
circuit to ground
3
Power supply to
LH seat heater
Ignition switch feed
None
99A2,
99A6
LH seat heater
runs
continuously
Output
Short circuit high
4
LH seat
temperature
signal
Resistance at 43° is
2.26k ohms. Pull up
resistance is 5.62k
ohms
B1B6511 998E
LH seat heater
inoperative
Input
Short circuit to
ground
4
LH seat
temperature
signal
Resistance at 43° is
2.26k ohms. Pull up
resistance is 5.62k
ohms
B1B6515 998E
LH seat heater
inoperative
Input
Open circuit,
short circuit high
5
RH seat
temperature
signal
Resistance at 43° is
2.26k ohms. Pull up
resistance is 5.62k
ohms
B1B6611 998F
RH seat heater
inoperative
Input
Short circuit to
ground
5
RH seat
temperature
signal
Resistance at 43° is
2.26k ohms. Pull up
resistance is 5.62k
ohms
B1B6615 998F
RH seat heater
inoperative
Input
Open circuit,
short circuit high
6
Power supply to
RH seat
Ignition switch feed
B1B6615
99A2,
99A7
RH seat heater
inoperative
Output
Short circuit to
ground, open
circuit (fuse
blows)
6
Power supply to
Ignition switch feed
None
99A2,
RH seat heater
runs
Output
Short circuit high
