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Climate Control
General Troubleshooting InformationHow to Check for DTCs with the HDS
1. Make sure the ignition switch is OFF.
2. Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.
Climate Control Component Location Index:
3. Turn the ignition switch ON (II).
4. Make sure the HDS communicates with the vehicle and the climate control unit. If it doesn't, troubleshoot the DLC circuit.
5. Select HVAC/CLIMATE CONTROL in the BODY ELECTRICAL menu.
6. Select DTCs in the HVAC/CLIMATE CONTROL menu.
7. Check for DTCs. If any DTCs are indicated, write down the DTCs, then go to the indicated DTC troubleshooting. If no DTCs are indicated, refer to symptom troubleshooting. Climate Control
NOTE:
- After troubleshooting, clear the DTCs with the HDS.
- For specific operations, refer to the user's manual that came with the HDS.
How to Use the Self-diagnostic Function without the HDS
The climate control unit has a self-diagnostic function. To run the self-diagnostic function, do the following.
NOTE: Before troubleshooting the climate control system, refer to B-CAN System Diagnosis Test Mode A Troubleshooting, Troubleshooting - B-CAN System Diagnosis Test Mode A and the communication circuit self-diagnostic function test.
1. Turn the ignition switch OFF, and then ON (II).
2. Press and hold the OFF button. While holding the OFF button, press the recirculation button five times within 10 seconds. Release the OFF button, then the self-diagnostic begins. Wait for about one minute for the self-diagnostic to complete.
NOTE: The blower motor will run various speeds regardless of what the panel is displaying.
- If there is any problem in the system, the temperature indicator will light up the segment (A through Q) corresponding to the error. The temperature indicator will then alternate every second between displaying "88" (all segments lit) and the error code segment (A through Q). To determine the meaning of the DTC, refer to checking for DTCs.
- If there are no problems detected, the segments will not illuminate, and the system will appear to be turned off.
Canceling the Self-diagnostic Function
3. Turn the ignition switch OFF to cancel the self-diagnostic function. After completing repair work, run the self-diagnostic function again to make sure that there are no other malfunctions.
Checking for DTCs
The temperature display indicates single or multiple DTCs. If indicator segments A, C, E, G, I, L, and O are on at the same time, there may be an open in the common ground wire. If no DTCs are present, the indicator remains blank.
