Special tool
 | Cooling System Pressure Tester 303-396 (24-001-A) |
 | Cooling System Pressure Tester Adapter 303-396-03 (24-001-А-03) |
Inspection and verification
1. Check the validity of the customer's complaint by activating the system.
2. Visually inspect for obvious signs of mechanical or electrical damage.
Visual Inspection Table
|
Mechanical factors |
Electrical Factors |
|
– Leaks – Expansion tank of the cooling system – Electric fan (s) – Radiator - Water pump – Accessory drive belt |
- Fuse – wiring harness – Loose or corroded connector (s) – Cylinder head temperature sensor |
3. If there is an obvious cause for the problem you identified or the customer described, troubleshoot before proceeding with the next steps (if possible).
4. If the cause of the problem is not visually obvious, check the symptom and refer to the Symptom Chart.
Symptom table
|
State |
Possible Causes |
Action |
|
•Lack of coolant |
•Hose (And) •Hose connections/couplings •Radiator •Water pump • Expansion tank of the cooling system •Heater core •Pad (And) • Cracks in engine casting • Rod plugs of the block of cylinders |
• Go to PINPOINT TEST A. |
|
•Engine overheating |
•Loss of coolant. • Blockage / narrowing of the flow section of the system's highways •Thermostat •Fuse (And). •Electrical circuit (And). • Cooling fan motor. •Water pump •Accessory drive belt • Cylinder head temperature sensor (SNT) •Powertrain control module (RSM) |
• Go to PINPOINT TEST B. |
|
•Engine does not reach normal operating temperature |
•Thermostat • Cooling fan motor. |
• Go to PINPOINT TEST C. |
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