Climate Control

Component Location Index
General Troubleshooting Information
- How to Check for DTCs with the HDS
- How to Use the Self-diagnostic Function without the HDS
- Checking for DTCs
- Displaying Sensor Inputs at the Climate Control Unit
- Check these items before using the sensor input display mode
- To run the sensor input display mode, follow these steps
DTC Troubleshooting Index
- Checking the DTCs by HDS
Symptom Troubleshooting Index
System Description
- Notes
- A/C Pressure Switch
- Dual Air Mix Control System
- i-Dual Climate Control System
- Climate Control Unit Inputs and Outputs
Circuit Diagram
DTC Troubleshooting
- Notes
- DTC B1202: Climate Control Unit Internal Error
- DTC B1205, DTC B1206, DTC B1207: HVAC or Climate Control Unit Lost Communication with Gauge Control Module (VSP/NE message) (ECT message) (ILLUMI message)
- DTC B1225 or DTC indicator A: An Open in the In-car Temperature Sensor Circuit
- DTC B1226 or DTC indicator B: A Short in the In-car Temperature Sensor Circuit
- DTC B1227 or DTC indicator C: An Open in the Outside Air Temperature Sensor Circuit
- DTC B1228 or DTC indicator D: A Short in the Outside Air Temperature Sensor Circuit
- DTC B1229 or DTC indicator E: An Open in the Sunlight Sensor Circuit
- DTC B1230 or DTC indicator F: A Short in the Sunlight Sensor Circuit
- DTC B1231 or DTC indicator G: An Open in the Evaporator Temperature Sensor Circuit
- DTC B1232 or DTC indicator H: A Short in the Evaporator Temperature Sensor Circuit
- DTC B1233 or DTC indicator I: An Open in the Driver's Air Mix Control Motor Circuit
- DTC B1234 or DTC indicator J: A Short in the Driver's Air Mix Control Motor Circuit
- DTC B1235 or DTC indicator K: A Problem in the Driver's Air Mix Control Linkage, Door, or Motor
- DTC B1236 or DTC indicator L: An Open in the Passenger's Air Mix Control Motor Circuit
- DTC B1237 or DTC indicator M: A Short in the Passenger's Air Mix Control Motor Circuit
- DTC B1238 or DTC indicator N: A Problem in the Passenger's Air Mix Control Linkage, Door, or Motor
- DTC B1239 or DTC indicator O: An Open or Short in the Mode Control Motor Circuit
- DTC B1240 or DTC indicator P: A Problem in the Mode Control Linkage, Doors, or Motor
- DTC B1241 or DTC indicator Q: A Problem in the Blower Motor Circuit
Recirculation Control Motor Circuit Troubleshooting
NAV. Communication Line Circuit Troubleshooting
Climate Control Power and Ground Circuit Troubleshooting
A/C Pressure Switch Circuit Troubleshooting
In-car Temperature Sensor Test
In-car Temperature Sensor Replacement
Sunlight Sensor Test
Sunlight Sensor Replacement
Driver's Air Mix Control Motor Test
Driver's Air Mix Control Motor Replacement
Passenger's Air Mix Control Motor Test
Passenger's Air Mix Control Motor Replacement
Climate Control Unit Removal and Installation