Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
DEFINITION: The engine temperature lamp comes on and stays on, the temperature gauge shows hot or coolant overflows from the coolant recovery reservoir onto the ground while the engine is running. | ||||
1 | Check for a loss of coolant. Has there been a loss of coolant? | -- | Go to Step 2 | Go to Step 3 |
2 | Refer to Loss of Coolant . Does the engine still overheat? | -- | Go to Step 3 | System OK |
3 | Check for a loss of system pressure. Use the J 24460-01 Cooling System Pressure Tester. Has there been a loss of system pressure? | -- | Go to Step 4 | Go to Step 5 |
4 | Correct the system pressure. Does the engine still overheat? | -- | Go to Step 5 | System OK |
5 |
Is there low coolant protection? | -37°C (-34°F) | Go to Step 6 | Go to Step 7 |
6 | Correct as necessary. Does the engine still overheat? | -- | Go to Step 7 | System OK |
7 |
Is the tensioner working properly and the tension correct? | -- | Go to Step 9 | Go to Step 8 |
8 | Replace the tensioner. Refer to Drive Belt Tensioner Diagnosis in Engine Mechanical - 3.4L. Does the engine still overheat? | -- | Go to Step 9 | System OK |
9 | Check to see if the timing is retarded by a malfunctioning powertrain control module (PCM). Is the timing retarded by a malfunctioning PCM? | -- | Go to Step 10 | Go to Step 11 |
10 | Correct as necessary. Does the engine still overheat? | -- | Go to Step 11 | System OK |
11 | Check to see if any of the radiator fins are obstructed. Are any of radiator fins obstructed? | -- | Go to Step 12 | Go to Step 13 |
12 |
Does the engine still overheat? | -- | Go to Step 13 | System OK |
13 | Check to see if any of the cooling system passages are blocked by rust or scale. Are any of the cooling system passages blocked by rust or scale? | -- | Go to Step 14 | Go to Step 15 |
14 |
Does the engine still overheat? | -- | Go to Step 15 | System OK |
15 | Check for a pinched or kinked coolant recovery reservoir hose. Is the surge tank hose pinched or kinked? | -- | Go to Step 16 | Go to Step 17 |
16 | Replace or reroute the hose as necessary. Refer to Radiator Surge Tank Inlet Hose/Pipe Replacement . Does the engine still overheat? | -- | Go to Step 17 | System OK |
17 | Check for an inoperative cooling fan. Refer to Cooling Fan Inoperative in Engine Cooling. Are there any inoperative cooling fans? | -- | Go to Step 18 | Go to Step 19 |
18 | Repair or replace the electric cooling fans as necessary. Refer to Engine Cooling Fan Replacement . Does the engine still overheat? | -- | Go to Step 19 | System OK |
19 | Check for a loose, damaged, and/or missing deflector. Are there any loose, damaged, or missing deflectors? | -- | Go to Step 20 | Go to Step 21 |
20 | Replace the deflectors. Does the engine still overheat? | -- | Go to Step 21 | System OK |
21 | Check to see if the thermostat is stuck in the closed position. Is the thermostat stuck in the closed position? | -- | Go to Step 22 | Go to Step 23 |
22 | Replace the thermostat. Refer to Engine Coolant Thermostat Replacement . Does the engine still overheat? | -- | Go to Step 23 | System OK |
23 | Check for a faulty coolant pump. Is the coolant pump faulty? | -- | Go to Step 24 | Go to Step 25 |
24 | Replace the water pump. Refer to Water Pump Replacement . Does the engine still overheat? | -- | Go to Step 25 | System OK |
25 | Check for an incorrect radiator. Is the radiator correct? | -- | Go to Step 26 | -- |
26 | Install the correct radiator. Refer to Radiator Replacement . Does the engine still overheat? | -- | -- | System OK |
