Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSHONDA2009PILOT TOURING, 3.5 4REPAIR AND DIAGNOSISHEATING, VENTILATION & A/C (HVAC)HVAC CONTROL SYSTEMSCLIMATE CONTROL
2009 Honda Pilot Touring, 3.5 4
Climate Control
2009 Honda Pilot Touring, 3.5 4SECTION Climate Control
- Component Location Index
- General Troubleshooting Information
- How To Check For DTCs With the HDS
- How To Use the HDS To Check For DTCs
- How To Use the Climate Control Unit 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
- Symptom Troubleshooting Index
- System Description
- Notes
- Humidity/In-Car Temperature Sensor
- Humidity/In-Car Temperature Sensor Quality
- A/C Pressure Sensor
- Climate Control Door Positions
- Dual Air Mix Control System
- I-Dual Zone and I-Tri Zone Climate Control System (With navigation system)
- Climate Control Unit Inputs and Outputs
- Rear Climate Control Panel Inputs and Outputs
- Circuit Diagram
- DTC Troubleshooting
- DTC U0155: Climate Control Unit Lost Communication With Gauge Control Module
- DTC B1213 or DTC Indicator N: An Open In the Rear Evaporator Temperature Sensor Circuit
- DTC B1214 or DTC Indicator P: A Short In the Rear Evaporator Temperature Sensor Circuit
- DTC B1215 or DTC Indicator C and WINDSHIELD DEFROST: An Open or Short In the Recirculation Control Motor Circuit
- DTC B1223 or DTC indicator M: A Problem In the Rear Blower Motor Circuit
- DTC B1225 or DTC Indicator A and AUTO: An Open In the In-car Temperature Sensor Circuit
- DTC B1226 or DTC Indicator B and AUTO: A Short In the In-car Temperature Sensor Circuit
- DTC B1227 or DTC Indicator C and AUTO: An Open In the Outside Air Temperature Sensor Circuit
- DTC B1228 or DTC Indicator D and AUTO: A Short In the Outside Air Temperature Sensor Circuit
- DTC B1229 or DTC Indicator E and AUTO: An Open In the Sunlight Sensor Circuit
- DTC B1230 or DTC indicator F and AUTO: A Short in the Sunlight Sensor Circuit
- DTC B1231 or DTC Indicator G and AUTO: An Open In the Front Evaporator Temperature Sensor Circuit
- DTC B1232 or DTC Indicator H and AUTO: A Short In the Front Evaporator Temperature Sensor Circuit
- DTC B1233 or DTC Indicator J and AUTO: An Open In the Driver's Air Mix Control Motor Circuit
- DTC B1234 or DTC Indicator K and AUTO: A Short In the Driver's Air Mix Control Motor Circuit
- DTC B1235 or DTC indicator L and AUTO: A Problem In the Driver's Air Mix Control Linkage, Door or Motor Circuit
- DTC B1236 or DTC Indicator M and AUTO: An Open In the Passenger's Air Mix Control Motor Circuit
- DTC B1237 or DTC Indicator N and AUTO: A Short In the Passenger's Air Mix Control Motor Circuit
- DTC B1238 or DTC Indicator P and AUTO: A Problem In the Passenger's Air Mix Control Linkage, Door or Motor Circuit
- DTC B1239 or DTC Indicator A: An Open or Short In the Front Mode Control Motor Circuit
- DTC B1240 or DTC Indicator B: A Problem In the Front Mode Control Linkage, Doors or Motor Circuit
- DTC B1241 or DTC Indicator C: A Problem In the Front Blower Motor Circuit
- DTC B1244 or DTC Indicator F: An Open In the Rear Air Mix Control Motor Circuit
- DTC B1245 or DTC Indicator G: A Short In the Rear Air Mix Control Motor Circuit
- DTC B1246 or DTC Indicator H: A Problem In the Rear Air Mix Control Linkage, Door or Motor Circuit
- DTC B2965: Climate Control Unit Lost Communication With Rear Climate Control Panel
- DTC B2967 or DTC Indicator A and WINDSHIELD DEFROST: An Open In the Humidity Sensor Circuit
- DTC B2968 or DTC Indicator A and WINDSHIELD DEFROST: A Short In the Humidity Sensor Circuit
- DTC B2969: Climate Control Unit Lost Communication With MICU (WIPSW Message)
- DTC B2979 or DTC Indicator B and WINDSHIELD DEFROST: An Open In the A/C Pressure Sensor Circuit
- DTC B2980 or DTC Indicator B and WINDSHIELD DEFROST: A Short In the A/C Pressure Sensor Circuit
- DTC B2983 or DTC Indicator D and WINDSHIELD DEFROST: A Problem In the Recirculation Control Linkage, Door or Motor Circuit
- Rear Mode Control Motor Circuit Troubleshooting
- Climate Control Unit Power, Ground, and Communication Circuit Troubleshooting
- Navigation Communication Line Circuit Troubleshooting
- Audio Communication Line Circuit Troubleshooting
- Humidity/In-car Temperature Sensor Test
- Humidity/In-Car Temperature Sensor Replacement
- Sunlight Sensor Test
- Sunlight Sensor Replacement
- Passenger's Air Mix Control Motor Test
- Passenger's Air Mix Control Motor Replacement
- Climate Control Unit Removal/Installation
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.