DTC B1227 (05): An Open in the Outside Air Temperature Sensor Circuit
| DTC Description | DTC |
|---|---|
| B1227 An open in the outside air temperature sensor circuit |
- 1. Problem verification:
1. Clear the DTC with the HDS.
2. Turn the vehicle to the OFF (LOCK) mode and then the ON mode.
3. Do the Self-Diagnostic Function with the HDS or the climate control unit - Refer to: How to Troubleshoot the Body ElectricalHow to Troubleshoot the Climate Control System .
4. Check for DTCs.
DTC Description DTC B1227 An open in the outside air temperature sensor circuit Is DTC B1227 or 05 indicated?
YES
Go to step 2.
NO
Intermittent failure. Check for loose wires or poor connections on the outside air temperature sensor circuit.
- 2. Open wire check (TAM line):
1. Turn the vehicle to the OFF (LOCK) mode.
2. Disconnect the following connectors.
Climate control unit 32P connector Outside air temperature sensor 2P connector 3. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Climate control unit 32P connector: disconnected Outside air temperature sensor 2P connector: disconnected Test point 1 Climate control unit 32P connector No. 19 Test point 2 Outside air temperature sensor 2P connector No. 1 Is there continuity?
YES
The TAM wire is not open. Go to step 3.
NO
Repair an open in the wire between the climate control unit and the outside air temperature sensor.
- 3. Open wire check (SENSOR COM line):
1. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Climate control unit 32P connector: disconnected Outside air temperature sensor 2P connector: disconnected Test point 1 Climate control unit 32P connector No. 23 Test point 2 Outside air temperature sensor 2P connector No. 2 Is there continuity?
YES
The SENSOR COM wire is OK. Go to step 4.
NO
Repair an open in the wire between the climate control unit and the outside air temperature sensor.
- 4. Shorted wire check (TAM line to SENSOR 5V line):
1. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Climate control unit 32P connector: disconnected Outside air temperature sensor 2P connector: disconnected Test point 1 Climate control unit 32P connector No. 17 Test point 2 Climate control unit 32P connector No. 19 Is there continuity?
YES
Repair a short in the wires between the climate control unit and the outside air temperature sensor.
NO
The TAM wire to SENSOR 5V wire are not shorted. Go to step 5.
- 5. Outside air temperature sensor check:
1. Test the outside air temperature sensor .
Is the outside air temperature sensor OK?
YES
Replace the climate control unit. .
NO
