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How to Use the Self-diagnostic Function with the HDS 21-10 Climate Control 1. Make sure the ignition switch is in LOCK (0). 2. Connect the HDS to the data link connector (DLC). 3. Turn the ignition switch to ON (II). 4. Make sure the HDS communicates with the vehicle and the climate control unit. If it doesn’t, troubleshoot the DLC circuit (see page 11-204). 5. Select HVAC/CLIMATE CONTROL in the BODY ELECTRICAL menu. 6. Select INSPECTION in the HVAC/CLIMATE CONTROL menu. 7. Select CLIMATE CONTROL SELF TEST in the INSPECTION menu. 8. Check for DTCs. If any DTCs are indicated, write down the DTCs, then go to the indicated DTC troubleshooting. NOTE: • After troubleshooting, clear the DTCs with the HDS. 08/08/21 14:40:57 61SNR030_210_0011 |