Step | Action | Value(s) | Yes | No |
---|---|---|---|---|
1 | Did you perform the HVAC and Engine Cooling Diagnostic System Checks? | -- | Go to Step 2 | Go to Diagnostic System Check in HVAC Automatic or Diagnostic Starting Point in Engine Cooling |
2 |
Is the coolant level low? | -- | Go to Step 6 | Go to Step 3 |
3 |
Does the coolant temperature increase steadily to the normal operating temperature? | -- | Go to Step 4 | Go to Engine Fails To Reach Normal Operating Temperature in Engine Cooling |
4 | Feel the inlet and the outlet hoses of the heater core. Do the inlet and the outlet hoses feel hot? | -- | Go to Step 5 | Go to Step 8 |
5 | Look for an inoperative actuator or a sticking mode or temp door. Are the actuators and doors operating properly? | -- | Go to Step 7 | Go to Step 12 |
6 | Inspect the cooling system for signs of leakage. Refer to Cooling System Leak Testing in Engine Cooling. Did you find a leak in the system? | -- | Go to Step 9 | Go to Step 10 |
7 |
Did you complete the repair? | -- | Go to Step 13 | -- |
8 |
Did you complete the repair? | -- | Go to Step 13 | -- |
9 | Repair the cooling system leak. Did you complete the repair? | -- | Go to Step 10 | -- |
10 |
Did you complete the repair? | -- | Go to Step 13 | -- |
11 |
Did you complete the repair? | -- | Go to Step 13 | -- |
12 | Repair or replace the actuator or the door. Did you complete the repair? | -- | Go to Step 13 | -- |
13 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |