DTC B1228 or DTC indicator D and AUTO: A Short in the Outside Air Temperature Sensor Circuit
WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. However, it is still accessible from the selected car via links, so may be relevant.
- Clear the DTC with the HDS.
- Turn the ignition switch to LOCK (0) and then to ON (ID.
- Do the self-diagnostic function with the HDS (see HOW TO USE THE SELF-DIAGNOSTIC FUNCTION WITH THE HDS ) or the climate control unit (see HOW TO USE THE SELF-DIAGNOSTIC FUNCTION WITHOUT THE HDS ).
- Check for DTCs.
Is DTC B1228 or D and AUTO indicated?
YES -Go to step 5.
NO -Intermittent failure.
- Turn the ignition switch to LOCK (0).
- Remove the outside air temperature sensor (see OUTSIDE AIR TEMPERATURE SENSOR REPLACEMENT
), and test it (see HUMIDITY/IN-CAR TEMPERATURE SENSOR REPLACEMENT
).
Is the outside air temperature sensor OK?
YES -Go to step 7.
NO -Replace the outside air temperature sensor.
- Disconnect the climate control unit 36P connector.
- Check for continuity between body ground and climate control unit 36P connector terminals No. 1 and No. 22 individually.Fig 1: Checking Continuity Between Body Ground And Climate Control Unit 36P Connector Terminals No. 1 And No. 22
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES -Repair a short to body ground in the wires between the climate control unit and the outside air temperature sensor.
NO -Go to step 9.
- Check for continuity between climate control unit 36P connector terminals No. 1 and No. 22.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES -Repair a short in the wires between the climate control unit and the outside air temperature sensor.
NO -Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit.