Defrosting Insufficient (LM2)
Defrosting Insufficient
| Step | Action | Yes | No | ||
|---|---|---|---|---|---|
| 1 | Were you sent here from Symptoms or another diagnostic table? | Go to Step 2 | Go to Symptoms - HVAC Systems - Automatic | ||
| 2 | 1. Start the engine. 2. Select the DEFROST mode. 3. Select the maximum blower speed. Does sufficient air flow from the defroster outlets? | Go to Step 3 | Go to Step 10 | ||
| 3 | Measure the engine operating temperature. Does engine reach a normal operating temperature? | Go to Step 4 | Go to Step 8 | ||
| 4 | 1. Select the minimum blower speed. 2. Select the warmest temperature setting. Warning: Refer to Moving Parts and Hot Surfaces Warning. 3. Feel the temperature of the inlet and outlet hoses at the heater core. Does the inlet heater hose feel warmer than the outlet heater hose? | Go to Step 11 | Go to Step 5 | ||
| 5 | Test the operation of the air conditioning compressor clutch. Does the air conditioning compressor clutch engage? | Go to Step 7 | Go to Step 6 | ||
| 6 | Repair the air conditioning compressor clutch. Air Conditioning Compressor Malfunction for the automatic system. Is the repair complete? | Go to Step 14 | — | ||
| 7 | Perform the air conditioning system performance test. Air Conditioning (A/C) System Performance Test Is the air conditioning system operating within the specifications? | Go to Step 9 | Go to Step 12 | ||
| 8 | Repair engine heating and cooling DTC for low engine temperature concern. Diagnostic Trouble | Go to Step 14 | — |
| Step | Action | Yes | No |
|---|---|---|---|
| Is the repair complete? | |||
| 9 | Inspect for correct operation of the recirculation door. Is the recirculation door operating correctly? | Go to Step 14 | Go to Step 13 |
| 10 | Repair the air delivery concern. Diagnostic Starting Point - Vehicle Is the repair complete? | Go to Step 14 | — |
| 11 | Repair the heating concern. Heating Performance Diagnostic Is the repair complete? | Go to Step 14 | — |
| 12 | Repair the air conditioning performance concern. Air Conditioning (A/C) System Performance Test Is the repair complete? | Go to Step 14 | — |
| 13 | Repair the recirculation door concern. Diagnostic Starting Point - Vehicle Is the repair complete? | Go to Step 14 | — |
| 14 | Operate the system in order to verify the repair. Did you find and correct the condition? | System OK | Go to Step 2 |