DTC B1227 or DTC indicator C and AUTO: An Open in the Outside Air Temperature Sensor Circuit
- Clear the DTC with the HDS.
- Turn the ignition switch to LOCK (0) and then to ON (II).
- 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 B1227 or C and AUTO indicated?
YES -Go to step 5.
NO -Intermittent failure, check for loose wires or poor connections in the outside air temperature sensor circuit.
- 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 climate control unit 36P connector terminal No. 22 and outside air temperature sensor 2P connector terminal No. 1.Fig 1: Checking Continuity Between Climate Control Unit 36P Connector And Outside Air Temperature Sensor 2P Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES -Go to step 9.
NO -Repair an open in the wire between the climate control unit and the outside air temperature sensor.
- Check for continuity between climate control unit 36P connector terminal No. 1 and outside air temperature sensor 2P connector terminal No. 2.Fig 2: Checking Continuity Between Climate Control Unit 36P Connector And Outside Air Temperature Sensor 2P Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES -Check for loose wires or poor connections at the climate control unit 36P connector and at the outside air temperature sensor 2P connector. If the connections are good, substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit.
NO -Repair an open in the wire between the climate control unit and the outside air temperature sensor.