DEFINITION: The starter/generator control module (SGCM) cooling system is loosing coolant either internally or externally.

Were you sent here from Symptoms, or another diagnostic table?

Go to Step 2

Go to Symptoms - Engine Cooling

Repair any present DTCs. Refer to Diagnostic System Check - Engine Cooling .

Is the action complete?

Go to Step 3

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Inspect the coolant level.

Is the coolant at the proper level?

Go to Step 5

Go to Step 4

Fill the SGCM cooling system to the proper level. Refer to Generator Control Module Cooling System Draining and Filling .

Is the action complete?

Go to Step 5

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Visually inspect the hoses, pipes and hose clamps.

Are any of the hoses, clamps or pipes leaking?

Go to Step 10

Go to Step 6

Visually inspect the following components:

Are any of the listed components leaking?

Go to Step 10

Go to Step 7

1. Pressure test the SGCM cooling system. Refer to Generator Control Module Cooling System Leak Testing .
2. With the cooling system pressurized, visually inspect the components listed in steps 5 and 6.

Are any leaks present?

Go to Step 10

Go to Step 8

Pressure test the SGCM coolant pressure cap. Refer to Pressure Cap Testing - Starter/Generator Control Module .

Does the coolant pressure cap hold pressure?

Go to Step 11

Go to Step 9

Replace the coolant pressure cap.

Is the repair complete?

Go to Step 11

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Repair or replace the leaking component. Refer to the appropriate repair.

Is the repair complete?

Go to Step 11

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Operate the system in order to verify the repair.

Did you find and correct the condition?

System OK

Go to Step 2