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Checking DTCs by DTC Indicator Acura TSX I

Automatic HVAC System 1 illustration

Checking DTCs by DTC Indicator

Note. Before troubleshooting the climate control system, refer to TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A .

To retrieve the DTC, you must run the self-diagnostic function. In the case of multiple problems, the respective indicator segments will come on. If indicator segments A, C, E, G, I, L, and 0 come on at the same time, there maybe an open in the common ground wire of the sensors.

Scheme 12

Scheme 12: Checking DTCs by DTC Indicator
Scheme 12: Checking DTCs by DTC Indicator
DTC (Temperature Indicator Segment)Detection Item
AAn open in the in-car temperature sensor circuit (see DTC B1225 OR DTC INDICATOR A: AN OPEN IN THE IN-CAR TEMPERATURE SENSOR CIRCUIT )
BA short in the in-car temperature sensor circuit (see DTC B1226 OR DTC INDICATOR B: A SHORT IN THE IN-CAR TEMPERATURE SENSOR CIRCUIT )
CAn open in the outside air temperature sensor circuit (see DTC B1227 OR DTC INDICATOR C: AN OPEN IN THE OUTSIDE AIR TEMPERATURE SENSOR CIRCUIT )
DA short in the outside air temperature sensor circuit (see DTC 1228 OR DTC INDICATOR D: A SHORT IN THE OUTSIDE AIR TEMPERATURE SENSOR CIRCUIT )
EAn open in the sunlight sensor circuit (see DTC B1229 OR DTC INDICATOR E: AN OPEN IN THE SUNLIGHT SENSOR CIRCUIT )
FA short in the sunlight sensor circuit (see DTC B1230 OR DTC INDICATOR F: A SHORT IN THE SUNLIGHT SENSOR CIRCUIT )
GAn open in the evaporator temperature sensor circuit (see DTC B1231 OR DTC INDICATOR G: AN OPEN IN THE EVAPORATOR TEMPERATURE SENSOR CIRCUIT )
HA short in the evaporator temperature sensor circuit (see DTC B1232 OR DTC INDICATOR H: A SHORT IN THE EVAPORATOR TEMPERATURE SENSOR CIRCUIT )
IAn open in the driver's air mix control motor circuit (see DTC B1233 OR DTC INDICATOR I: AN OPEN IN THE DRIVER'S AIR MIX CONTROL MOTOR CIRCUIT )
JA short in the driver's air mix control motor circuit (see DTC B1234 OR DTC INDICATOR J: A SHORT IN THE DRIVER'S AIR MIX CONTROL MOTOR CIRCUIT )
KA problem in the driver's air mix control linkage, door, or motor (see DTC B1235 OR DTC INDICATOR K: A PROBLEM IN THE DRIVER'S AIR MIX CONTROL LINKAGE, DOOR, OR MOTOR )
LA short or open in the mode control motor circuit (see DTC B1239 OR DTC INDICATOR L: A SHORT OR OPEN IN THE MODE CONTROL MOTOR CIRCUIT )
MA problem in the mode control linkage, doors, or motor (see DTC B1240 OR DTC INDICATOR M: A PROBLEM IN THE MODE CONTROL LINKAGE, DOORS, OR MOTOR )
NA problem in the blower motor circuit (see DTC B1241 OR DTC INDICATOR N: A PROBLEM IN THE BLOWER MOTOR CIRCUIT )
OAn open in the passenger's air mix control motor circuit (see DTC B1236 OR DTC INDICATOR O: AN OPEN IN THE PASSENGER'S AIR MIX CONTROL MOTOR CIRCUIT )
PA short in the passenger's air mix control motor circuit (see DTC B1237 OR DTC INDICATOR P: A SHORT IN THE PASSENGER'S AIR MIX CONTROL MOTOR CIRCUIT )
QA problem in the passenger's air mix control linkage, door, or motor (see DTC B1238 OR DTC INDICATOR Q: A PROBLEM IN THE PASSENGER'S AIR MIX CONTROL LINKAGE, DOOR, OR MOTOR )

DTC TEMPERATURE CHART