DTC B1229 (07): An Open in the Sunlight Sensor Circuit
| DTC Description | DTC |
|---|---|
| B1229 An open in the sunlight 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 B1229 An open in the sunlight sensor circuit Is DTC B1229 or 07 indicated?
YES
Go to step 2.
NO
Intermittent failure. Check for loose wires or poor connections on the sunlight sensor circuit.
- 2. Open wire check (TSUN line):
1. Turn the vehicle to the OFF (LOCK) mode.
2. Disconnect the following connectors.
Climate control unit 32P connector Sunlight sensor connector 3. Check for continuity between test points 1 and 2.
2P connector
Test condition Vehicle OFF (LOCK) mode Climate control unit 32P connector: disconnected Sunlight sensor 2P connector: disconnected Test point 1 Climate control unit 32P connector No. 3 Test point 2 Sunlight sensor 2P connector No. 2 7P connector
Test condition Vehicle OFF (LOCK) mode Climate control unit 32P connector: disconnected Sunlight sensor 7P connector: disconnected Test point 1 Climate control unit 32P connector No. 3 Test point 2 Sunlight sensor 2P connector No. 2 Is there continuity?
YES
The TSUN wire is not open. Go to step 3.
NO
Repair an open in the wire between the climate control unit and the sunlight sensor.
- 3. Open wire check (SENSOR COM line):
1. Check for continuity between test points 1 and 2.
2P connector
Test condition Vehicle OFF (LOCK) mode Climate control unit 32P connector: disconnected Sunlight sensor 2P connector: disconnected Test point 1 Climate control unit 32P connector No. 23 Test point 2 Sunlight sensor 2P connector No. 1 7P connector
Test condition Vehicle OFF (LOCK) mode Climate control unit 32P connector: disconnected Sunlight sensor 7P connector: disconnected Test point 1 Climate control unit 32P connector No. 23 Test point 2 Sunlight sensor 2P connector No. 3 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 sunlight sensor.
- 4. Shorted wire check (TSUN 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 Sunlight sensor connector: disconnected Test point 1 Climate control unit 32P connector No. 3 Test point 2 Climate control unit 32P connector No. 17 Is there continuity?
YES
Repair a short in the wires between the climate control unit and the sunlight sensor.
NO
The TSUN wire to SENSOR 5V wire are not shorted. Go to step 5.
- 5. Sunlight sensor check:
1. Reconnect the climate control unit 32P connector.
Is the sunlight sensor OK?
YES
Replace the climate control unit .
NO
