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Checking for DTCs

The temperature display indicates single or multiple DTCs. If no DTCs are present, the indicator remains blank.

NOTE: If indicator segments A, C, D, E, G, J, and the AUTO indicator or the A/C indicator are on at the same time, there may be an open in the climate control unit ground circuit.
Fig 1: Identifying Temperature Indicator, Auto Indicator And A/C Indicator
G06953600Courtesy of AMERICAN HONDA MOTOR CO., INC.
DTC CHART

DTC (Temperature Indicator Segment, AUTO and A/C Indicator) Detection Item
A and AUTO An open in the in-car temperature sensor circuit (see DTC B1225 OR DTC INDICATOR A AND AUTO: AN OPEN IN THE IN-CAR TEMPERATURE SENSOR CIRCUIT  )
B and AUTO A short in the in-car temperature sensor circuit (see DTC B1226 OR DTC INDICATOR B AND AUTO: A SHORT IN THE IN-CAR TEMPERATURE SENSOR CIRCUIT  )
C and AUTO An open in the outside air temperature sensor circuit (see DTC B1227 OR DTC INDICATOR C AND AUTO: AN OPEN IN THE OUTSIDE AIR TEMPERATURE SENSOR CIRCUIT  )
D and AUTO A short in the outside air temperature sensor circuit (see DTC B1228 OR DTC INDICATOR D AND AUTO: A SHORT IN THE OUTSIDE AIR TEMPERATURE SENSOR CIRCUIT  )
E and AUTO An open in the sunlight sensor circuit (see DTC B1229 OR DTC INDICATOR E AND AUTO: AN OPEN IN THE SUNLIGHT SENSOR CIRCUIT  )
F and AUTO A short in the sunlight sensor circuit (see DTC B1230 OR DTC INDICATOR F AND AUTO: A SHORT IN THE SUNLIGHT SENSOR CIRCUIT  )
G and AUTO An open in the evaporator temperature sensor circuit (see DTC B1231 OR DTC INDICATOR G AND AUTO: AN OPEN IN THE EVAPORATOR TEMPERATURE SENSOR CIRCUIT  )
H and AUTO A short in the evaporator temperature sensor circuit (see DTC B1232 OR DTC INDICATOR H AND AUTO: A SHORT IN THE EVAPORATOR TEMPERATURE SENSOR CIRCUIT  )
J and AUTO An open in the humidity sensor circuit (see DTC B2967 OR DTC INDICATOR J AND AUTO: AN OPEN IN THE HUMIDITY SENSOR CIRCUIT  )
K and AUTO A short in the humidity sensor circuit (see DTC B2968 OR DTC INDICATOR K AND AUTO: A SHORT IN THE HUMIDITY SENSOR CIRCUIT  )
A and A/C An open in the air mix control motor circuit (see DTC B1233 OR DTC INDICATOR A AND A/C: AN OPEN IN THE AIR MIX CONTROL MOTOR CIRCUIT  )
B and A/C A short in the air mix control motor circuit (see DTC B1234 OR DTC INDICATOR B AND A/C: A SHORT IN THE AIR MIX CONTROL MOTOR CIRCUIT  )
C and A/C A problem in the air mix control motor circuit, linkage, door, or motor (see DTC B1235 OR DTC INDICATOR C AND A/C: A PROBLEM IN THE AIR MIX CONTROL MOTOR CIRCUIT, LINKAGE, DOOR, OR MOTOR  )
D and A/C An open or short in the mode control motor circuit (see DTC B1239 OR DTC INDICATOR D AND A/C: AN OPEN OR SHORT IN THE MODE CONTROL MOTOR CIRCUIT  )
E and A/C A problem in the mode control motor circuit, linkage, door, or motor (see DTC B1240 OR DTC INDICATOR E AND A/C: A PROBLEM IN THE MODE CONTROL MOTOR CIRCUIT, LINKAGE, DOOR, OR MOTOR  )
F and A/C A problem in the blower motor circuit (see DTC B1241 OR DTC INDICATOR F AND A/C: A PROBLEM IN THE BLOWER MOTOR CIRCUIT  )
A Climate control unit internal error (see DTC INDICATOR A: CLIMATE CONTROL UNIT INTERNAL ERROR  )
B Climate control unit lost communication with gauge control module (VSP/NE message) (see DTC B1205 OR DTC INDICATOR B: CLIMATE CONTROL UNIT LOST COMMUNICATION WITH GAUGE CONTROL MODULE (VSP/NE MESSAGE); DTC B1206 OR DTC INDICATOR C: CLIMATE CONTROL UNIT LOST COMMUNICATION WITH GAUGE CONTROL MODULE (COOLANT TEMP MESSAGE); DTC B1207 OR DTC INDICATOR D: CLIMATE CONTROL UNIT LOST COMMUNICATION WITH GAUGE CONTROL MODULE (ILLUMINATION MESSAGE)  )
C Climate control unit lost communication with gauge control module (coolant temp message) (see DTC B1205 OR DTC INDICATOR B: CLIMATE CONTROL UNIT LOST COMMUNICATION WITH GAUGE CONTROL MODULE (VSP/NE MESSAGE); DTC B1206 OR DTC INDICATOR C: CLIMATE CONTROL UNIT LOST COMMUNICATION WITH GAUGE CONTROL MODULE (COOLANT TEMP MESSAGE); DTC B1207 OR DTC INDICATOR D: CLIMATE CONTROL UNIT LOST COMMUNICATION WITH GAUGE CONTROL MODULE (ILLUMINATION MESSAGE)  )
D Climate control unit lost communication with gauge control module (illumination message) (see DTC B1205 OR DTC INDICATOR B: CLIMATE CONTROL UNIT LOST COMMUNICATION WITH GAUGE CONTROL MODULE (VSP/NE MESSAGE); DTC B1206 OR DTC INDICATOR C: CLIMATE CONTROL UNIT LOST COMMUNICATION WITH GAUGE CONTROL MODULE (COOLANT TEMP MESSAGE); DTC B1207 OR DTC INDICATOR D: CLIMATE CONTROL UNIT LOST COMMUNICATION WITH GAUGE CONTROL MODULE (ILLUMINATION MESSAGE)  )
E Communication bus line error (BUS-OFF) (see DTC B1200: COMMUNICATION BUS LINE ERROR (BUS-OFF) )
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