The temperature display indicates single or multiple DTCs. If indicator segments A, C, E, and G are on at the same time, there may be an open in the common ground wire. If no DTCs are present, the indicator remains blank.

DTC (Temperature Indicator Segment and AUTO Indicator)	Detection Item
A	An open in the in-car temperature sensor circuit
B	A short in the in-car temperature sensor circuit
C	An open in the outside air temperature sensor circuit
D	A short in the outside air temperature sensor circuit
E	An open in the sunlight sensor circuit
F	A short in the sunlight sensor circuit
G *1	An open in the evaporator temperature sensor circuit
H *2	A short in the evaporator temperature sensor circuit
J	A problem in the air mix control linkage, door, or motor
L	A problem in the mode control linkage, doors, or motor
M	A problem in the recirculation control linkage, door, or motor
N	A problem in the blower motor
P	Heater control unit internal error
A and AUTO	Heater control unit lost communication with gauge control module (TACH) (NE message)
B and AUTO	Heater control unit lost communication with gauge control module (TACH) (ECT message)
C and AUTO	Heater control unit lost communication with recirculation control motor
D and AUTO	Heater control unit lost communication with mode control motor
E and AUTO	Heater control unit lost communication with gauge control module (TACH) (VSP message)
G and AUTO	Air mix control motor failure
J and AUTO	Communication bus line error
K and AUTO	Heater control unit lost communication with each control motor
L and AUTO	Heater control unit lost communication with air mix control motor
N and AUTO	Mode control motor failure
P and AUTO	Recirculation control motor failure

*1:	The evaporator temperature sensor is not equipped for the only heater model (without A/C model). So the heater control unit stores DTC 1231 or DTC G even if the system is normal.
*2:	The evaporator temperature sensor is not equipped for the only heater model (without A/C model).