|
Step
|
Action
|
Yes
|
No
|
|
DEFINITION: The cooling system is loosing coolant either internally or externally.
|
1
|
Were you sent here from Symptoms or another diagnostic table?
|
Go to
Step 2
|
Go to
Symptoms - Engine Cooling
|
2
|
Resolve any present DTCs. See
Diagnostic system check - vehicle
.
Is the action complete?
|
Go to
Step 3
|
-
|
3
|
Inspect the coolant level.
Is the coolant at the proper level?
|
Go to
Step 5
|
Go to
Step 4
|
4
|
Fill the cooling system to the proper level. Refer to
Cooling System, Draining and Filling (GE 47716)
Cooling System, Draining and Filling (Static Fill LAU)
Cooling System, Draining and Filling (Static Fill LF1)
.
Is the action complete?
|
Go to
Step 5
|
-
|
5
|
Engine overheating can cause a loss of coolant.
Is the engine overheating?
|
Go to
Step 19
|
Go to
Step 6
|
6
|
|
1.
|
Allow the engine idle at normal operating temperature.
|
|
2.
|
Inspect for heavy white smoke coming out of the exhaust pipe.
|
Is a heavy white smoke present from the exhaust pipe?
|
Go to
Step 7
|
Go to
Step 8
|
7
|
|
1.
|
Coolant in the exhaust system creates a distinctive, burning coolant odor in the exhaust.
|
|
2.
|
Condensation in the exhaust system can cause an odorless white smoke during engine warm up.
|
Does the white smoke have a burning coolant type odor?
|
Go to
Step 20
|
Go to
Step 8
|
8
|
Visually inspect the hoses, pipes and hose clamps.
Are any of the hoses, clamps or pipes leaking?
|
Go to
Step 21
|
Go to
Step 9
|
9
|
Visually inspect the following components:
Are any of the listed components leaking?
|
Go to
Step 21
|
Go to
Step 10
|
10
|
|
2.
|
With the cooling system pressurized, visually inspect the components listed in steps 7, 8 and 9.
|
Are any leaks present?
|
Go to
Step 21
|
Go to
Step 11
|
11
|
Pressure test the coolant pressure cap. Refer to
Pressure Cap Testing
.
Does the coolant pressure cap hold pressure?
|
Go to
Step 12
|
Go to
Step 16
|
12
|
Inspect for the following conditions:
|
•
|
A coolant smell inside of the vehicle
|
|
•
|
Coolant in the HVAC module drain tube
|
|
•
|
Coolant on the vehicle floor covering near the HVAC module
|
Is coolant present?
|
Go to
Step 21
|
Go to
Step 13
|
13
|
Inspect the underside of the engine oil fill cap for a gray/white milky substance.
Is there a milky substance under the oil fill cap?
|
Go to
Step 14
|
Go to
Step 15
|
14
|
Inspect the engine oil fluid level indicator for a gray/white milky substance.
Is there a milky substance on the engine oil fluid level indicator?
|
Go to
Step 17
|
Go to
Step 15
|
15
|
Inspect the automatic transmission oil fluid level indicator, if equipped, for a gray/white milky substance.
Is there a milky substance on the automatic transmission fluid level indicator?
|
Go to
Step 18
|
Go to
Step 22
|
16
|
Replace the coolant pressure cap.
Is the repair complete?
|
Go to
Step 22
|
-
|
17
|
Is the repair complete?
|
Go to
Step 22
|
-
|
18
|
Is the repair complete?
|
Go to
Step 22
|
-
|
19
|
Repair the engine overheating condition. Refer to
Engine Overheating
.
Is the repair complete?
|
Go to
Step 22
|
-
|
20
|
Repair the engine internal coolant leak. Refer to
Coolant in Combustion Chamber
or,
Coolant in Engine Oil
.
Is the repair complete?
|
Go to
Step 22
|
-
|
21
|
Repair or replace the leaking component. Refer to the appropriate repair.
Is the repair complete?
|
Go to
Step 22
|
-
|
22
|
Operate the system in order to verify the repair.
Did you find and correct the condition?
|
System OK
|
Go to
Step 2
|
