Engine Cooling (hybrid) Mercury Mariner II рестайлинг

Material Specifications

MATERIAL SPECIFICATIONS

General Specifications

GENERAL SPECIFICATIONS

Torque Specifications

TORQUE SPECIFICATIONS

Note. Early build vehicle cooling systems are filled with Motorcraft® Premium Gold Engine Coolant. Late build vehicle cooling systems are filled with Motorcraft® Specialty Orange Engine Coolant. Do not mix coolant types. Mixing coolant types degrades the corrosion protection of the coolant. Failure to follow these instructions may damage the engine or cooling system.

Note. If cooling system stop leak pellets are used, Motorcraft® Premium Gold Engine Coolant may darken from yellow to golden tan.

Note. During normal vehicle operation, Motorcraft® Specialty Orange Engine Coolant may change color from orange to pink or light red. As long as the engine coolant is clear and uncontaminated, this color change does not indicate the engine coolant has degraded nor does it require the engine coolant to be drained, the system to be flushed, or the engine coolant to be replaced.

The cooling system components are the

1. block heater (if equipped).
2. radiator.
3. bypass tube.
4. pressure relief cap.
5. degas bottle.
6. radiator draincock.
7. coolant pump.
8. coolant temperature indicator sender unit.
9. thermostat housing.
10. auxiliary coolant flow pump, refer to «CLIMATE CONTROL»(/mercury/mariner/ii-2011-2011/remont/automatic-hvac-system/#climate-control-system) article for removal and installation and «CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS - HYBRID»(/mercury/mariner/ii-2011-2011/remont/automatic-hvac-system/#climate-control-system-general-information-and-diagnostics-hybrid) article for diagnostics.

The degas bottle has 2 reservoirs and 2 pressure relief caps. The front (larger) reservoir and pressure relief cap are part of the engine cooling system. The rear (smaller) reservoir and pressure relief cap are part of the Motor Electronics Cooling System (MECS). The 2 reservoirs are separate and both cooling systems are independent of each other. For information on the MECS , refer to TRANSAXLE/TRANSMISSION COOLING - HYBRID article.

Engine coolant provides freeze protection, boil protection, cooling efficiency and corrosion protection to the engine and cooling components. In order to obtain these protections, maintain the engine coolant at the correct concentration and fluid level in the degas bottle.

When adding engine coolant, use a 50/50 mixture of engine coolant and distilled water. A coolant concentration of 50% will provide freeze point protection down to -37°C (-34°F).

To maintain the integrity of the coolant and the cooling system

1. Add Motorcraft® Premium Gold Engine Coolant or Motorcraft® Specialty Orange Engine Coolant. Use the same type of coolant that is present in the system. Do not mix coolant types.
2. Do not add or mix different coolant types. Mixing coolants degrades the coolant's corrosion protection.
3. Do not add alcohol, methanol, brine or any engine coolants mixed with alcohol or methanol antifreeze. These can cause engine damage from overheating or freezing.
4. Ford Motor Company does NOT recommend the use of recycled engine coolant in vehicles equipped with Motorcraft® Premium Gold Engine Coolant or Motorcraft® Specialty Orange Engine Coolant since a Ford-approved recycling process is not yet available.

Coolant Flow Diagram

Note. Black arrows indicate hot, white arrows indicate cold.

Scheme 26

ITEM DESCRIPTION

Special Tool(s)

SPECIAL TOOLS 3-Way HD Antifreeze Coolant Test Kit 328-00001 or equivalent Coolant/Battery Refractometer ROB75240 or equivalent D-Gas Adapter 300-OTC014-R1068 or equivalent Radiator Tester STN12270 or equivalent UView® Combustion Leak Tester UVU560000-R Vehicle Communication Module (VCM) and Integrated Diagnostic System (IDS) software with appropriate hardware or equivalent scan tool

Scheme 27

Scheme 28

Scheme 29

Scheme 30

MATERIAL SPECIFICATIONS

Principles of Operation

Engine coolant flows primarily from the engine to the radiator circuit and back to the coolant pump. Coolant is sent from the coolant pump through the engine block and cylinder heads. A separate circuit from the engine also feeds the heater core and turbochargers with coolant. The coolant pump, operated by engine rotation through a sprocket which is driven by the timing chain, circulates the coolant. The coolant thermostat is a control valve actuated by coolant temperature. When the thermostat is closed, coolant flow bypasses the radiator circuit and returns to the coolant pump. When the thermostat is opened, coolant flows through the radiator circuit to transfer engine-generated heat to the outside air.

The degas bottle holds surplus coolant and removes air from the cooling system, which reduces hot spots. It also allows for coolant expansion and system pressurization, replenishes coolant to the cooling system and serves as the location for service fill.

The cooling fan draws air through the radiator to help cool the system coolant as it passes through the radiator.

The thermostat monitor is a function of the PCM and is designed to verify correct thermostat operation. The monitor executes once per drive cycle and has a monitor run duration of 300-800 seconds. If a malfunction occurs, DTC P0125 or P0128 is set, and the Malfunction Indicator Lamp (MIL) is illuminated.

For engine specific information, refer to ENGINE COOLING in the Description and Operation portion of this service information.

Inspection and Verification

Note. The engine cooling system is filled with Motorcraft® Premium Gold Engine Coolant or Motorcraft® Specialty Orange Engine Coolant. Always fill the cooling system with the manufacturer's specified coolant. Chemically flush the cooling system if a non-specified coolant has been used. Refer to COOLING SYSTEM FLUSHING in this service information. Failure to follow these instructions may damage the engine or cooling system.

Note. Early build vehicle cooling systems are filled with Motorcraft® Premium Gold Engine Coolant. Late build vehicle cooling systems are filled with Motorcraft® Specialty Orange Engine Coolant. Do not mix coolant types. Mixing coolant types degrades the corrosion protection of the coolant. Failure to follow these instructions may damage the engine or cooling system.

Note. During normal vehicle operation, Motorcraft® Specialty Orange Engine Coolant may change color from orange to pink or light red. As long as the engine coolant is clear and uncontaminated, this color change does not indicate the engine coolant has degraded nor does it require the engine coolant to be drained, the system to be flushed, or the engine coolant to be replaced.

Note. Vehicles have the pressure relief cap on the degas bottle and no radiator cap.

1. Verify the customer concern.
2. Visually check the engine coolant level at the degas bottle when the system is cold.
3. Make sure the pressure relief cap is installed correctly.
4. Record any cooling system DTCs retrieved. Refer to the «DTC CHART»(/mercury/mariner/ii-2011-2011/remont/cooling-system-mechanical/#engine-cooling-hybrid) in this service information for DTC descriptions.
5. If the system coolant is filled correctly and no DTCs associated with fail-safe cooling are retrieved, verify the customer concern by operating the engine to duplicate the condition.
6. Visually inspect for obvious signs of any mechanical or electrical concerns damage. VISUAL INSPECTION Mechanical Electrical Leaks or weeps at: Hoses Tubes Clamp joints Gaskets O-rings Thermostat housing Radiator Pressure relief cap Coolant pump Heater core (wet floor or coolant odor in vehicle) Degas bottle Cylinder block core plugs Cylinder head core plugs Auxiliary coolant flow pump Block heater (if equipped) Inoperative or damaged: Electric cooling fan Wiring, connectors, relays or modules Cylinder Head Temperature (CHT) sensor Mass Air Flow (MAF) sensor Vehicle Speed Sensor (VSS) sensor Cracked or damaged: Hoses Tubes Hose clamps Thermostat housing Radiator Pressure relief cap Cooling fan Coolant pump Degas bottle Cylinder block core plugs Cylinder head core plugs Auxiliary coolant flow pump Block heater (if equipped) Restricted airflow through the A/C condenser/radiator Drive belt loose, worn or installed incorrectly Broken or weak drive belt tensioner Excessive white or light gray exhaust smoke (may have burnt coolant odor) Coolant in engine oil Engine oil in coolant
7. If the inspection reveals an obvious concern that can be readily identified, repair it as necessary. Test the system for normal operation.
8. Inspect the coolant condition. Inspect the coolant color. If Motorcraft® Premium Gold Engine Coolant has a clear or pale yellow color, this indicates higher water content than required. Test the engine coolant freezing point range with the Coolant/Battery Refractometer. The freezing point should be in the range -50°C to -26°C (-58°F to -15°F). If the vehicle is driven in cold climates less than -37°C (- 34°F), it may be necessary to increase the coolant concentration to get adequate freeze protection. Recommended coolant concentration is 50/50 coolant to distilled water. NOTE: If cooling system stop leak pellets are used, Motorcraft® Premium Gold Engine Coolant may darken from yellow to golden tan. For cooling systems filled with Motorcraft® Premium Gold Engine coolant, dark brown could indicate a commercially available stop leak may have been used and could result in loss of coolant flow to critical parts of the engine. Flush the system and refill with the correct mixture of Motorcraft® Premium Gold Engine Coolant and distilled water. Refer to «COOLING SYSTEM FLUSHING»(/mercury/mariner/ii-2011-2011/remont/cooling-system-mechanical/#engine-cooling-hybrid) in this service information. For cooling systems filled with Motorcraft® Premium Gold Engine coolant, a pale green color indicates incorrect coolant (green in color) has been added to the system. Use of incorrect (green in color) coolant degrades the corrosion protection of Motorcraft® Premium Gold Engine Coolant. If incorrect coolant has been added, flush the system and refill with the correct mixture of Motorcraft® Premium Gold Engine Coolant and distilled water. Refer to «COOLING SYSTEM FLUSHING»(/mercury/mariner/ii-2011-2011/remont/cooling-system-mechanical/#engine-cooling-hybrid) in this service information. For cooling systems filled with Motorcraft® Premium Gold Engine coolant, a red/orange color indicates incorrect coolant (red/orange in color) may have been added to the system. Use of incorrect (red/orange in color) coolant degrades the corrosion protection of Motorcraft® Premium Gold Engine Coolant. Flush the system and refill with the correct mixture of Motorcraft® Premium Gold Engine Coolant and distilled water. Refer to «COOLING SYSTEM FLUSHING»(/mercury/mariner/ii-2011-2011/remont/cooling-system-mechanical/#engine-cooling-hybrid) in this service information. For cooling systems filled with Motorcraft® Specialty Orange Engine Coolant, discoloration may indicate that incorrect coolant may have been added to the system. Use of incorrect (green or yellow in color) coolant degrades the corrosion protection of Motorcraft® Specialty Orange Engine Coolant. Addition of Motorcraft® Specialty Green Engine Coolant may cause the color to appear to be a murky green-brown color. The addition of Motorcraft® Premium Gold Coolant, however, may not change the color or appearance of the orange colored coolant. Detection of contamination with Premium Gold Engine Coolant is determined by the presence of nitrite. If contamination with Motorcraft® Premium Gold Engine Coolant is suspected, test the coolant with the 3-Way HD Antifreeze Coolant Test Kit. Follow the directions in/on the packaging with regard to nitrite testing. If the incorrect coolant has been added to the cooling system (nitrite is present), flush the system and refill with the correct mixture of distilled water and Motorcraft® Specialty Orange Engine Coolant. Refer to «COOLING SYSTEM FLUSHING»(/mercury/mariner/ii-2011-2011/remont/cooling-system-mechanical/#engine-cooling-hybrid) in this service information. For cooling systems filled with Motorcraft® Specialty Orange Engine Coolant, a darker orange with the presence of debris could indicate a commercially available stop leak may have been used and could result in loss of coolant flow to critical parts of the engine. If sediment is present in the coolant sample, flush the system and refill with the correct mixture of distilled water and Motorcraft® Specialty Orange Engine Coolant. Refer to «COOLING SYSTEM FLUSHING»(/mercury/mariner/ii-2011-2011/remont/cooling-system-mechanical/#engine-cooling-hybrid) in this service information. A light or reddish brown color or reddish brown particles indicate that rust may be present in the cooling system. Flush the system and refill with the correct mixture of distilled water and the correct engine coolant. An iridescent sheen on top of the coolant could indicate a trace of oil is entering the system. For information on engine diagnosis, refer to «ENGINE MECHANICAL SYSTEM - GENERAL INFORMATION»(/mercury/mariner/ii-2011-2011/remont/mechanical/#engine-mechanical-system-general-information) article. A milky brown color may indicate that engine oil is entering the cooling system. Pressure test the cooling system. Refer to «COMPONENT TESTS»(/mercury/mariner/ii-2011-2011/remont/cooling-system-mechanical/#engine-cooling-hybrid) in this service information. If engine oil is suspected, the cause of the leak may be internal to the engine. Refer to «ENGINE MECHANICAL SYSTEM - GENERAL INFORMATION»(/mercury/mariner/ii-2011-2011/remont/mechanical/#engine-mechanical-system-general-information) article. If the engine coolant appearance is acceptable, test the engine coolant freezing point range with the Coolant/Battery Refractometer. The freezing point should be in the range -50°C to -26°C (-58°F to -15°F). If the vehicle is driven in cold climates less than -37°C (-34°F), it may be necessary to increase the coolant concentration to get adequate freeze protection. Recommended coolant concentration is 50/50 engine coolant to distilled water. Maximum coolant concentration is 60/40 for cold weather areas. Minimum coolant concentration is 40/60 for warm weather areas. Adjust coolant range and level if necessary: If coolant is low, add specified coolant mixture only. If the engine coolant tests too weak, remove some of the engine coolant and add undiluted engine coolant until the readings are within acceptable levels. If the engine coolant tests strong, remove some of the engine coolant and add distilled water until the readings are within acceptable levels.
9. If an obvious cause for an observed or reported concern is found, correct the cause and test the system for normal operation before proceeding to the next step.
10. If the cause is not visually evident, connect the scan tool to the Data Link Connector (DLC).
11. If the scan tool does not communicate with the VCM : check the VCM connection to the vehicle. check the scan tool connection to the VCM . refer to «MODULE COMMUNICATIONS NETWORK»(/mercury/mariner/ii-2011-2011/remont/communication-devices/#module-communications-network) article, No Power To The Scan Tool, to diagnose no power to the scan tool.
12. If the scan tool does not communicate with the vehicle: verify the ignition key is in the ON position. verify the scan tool operation with a known good vehicle. refer to «MODULE COMMUNICATIONS NETWORK»(/mercury/mariner/ii-2011-2011/remont/communication-devices/#module-communications-network) article to diagnose no response from the PCM.
13. Carry out the network test. If the scan tool responds with no communication for one or more modules, refer to «MODULE COMMUNICATIONS NETWORK»(/mercury/mariner/ii-2011-2011/remont/communication-devices/#module-communications-network) article. If the network test passes, retrieve and record Continuous Memory Diagnostic Trouble Codes (CMDTCs).
14. Clear the CMDTCs and carry out the self-test diagnostics for the PCM.
15. If the DTCs recovered are related to the concern, go to the «PCM DTC CHART»(/mercury/mariner/ii-2011-2011/remont/cooling-system-mechanical/#engine-cooling-hybrid__pcm-dtc-chart) . For all other PCM DTCs, refer to «ELECTRONIC ENGINE CONTROLS - HYBRID»(/mercury/mariner/ii-2011-2011/remont/removal-installation/#electronic-engine-controls-hybrid) article.
16. If no DTCs related to the concern are retrieved, GO to «SYMPTOM CHART»(/mercury/mariner/ii-2011-2011/remont/cooling-system-mechanical/#engine-cooling-hybrid__symptom-chart) .

PCM DTC Chart

PCM DTC CHART

Symptom Chart

SYMPTOM CHART

Normal Operation

The engine cooling system is a closed system providing for coolant expansion and contraction and also changes in pressure as coolant warms and cools with engine operation. Various gaskets, seals, hoses and clamps contain coolant within the cooling system and keep other fluids and contaminants from entering the cooling system.

Coolant loss can be attributed to either external or internal leaks anywhere within the cooling system.

For engine specific information, refer to ENGINE COOLING in the Description and Operation portion of this service information.

This pinpoint test is intended to diagnose the following

1. Coolant hoses or tubes
2. Hose clamps
3. Thermostat gasket
4. Coolant pump O-ring seal
5. Thermostat housing
6. Radiator
7. Pressure relief cap
8. Coolant pump leaking from weep hole
9. Auxiliary coolant pump
10. Heater core
11. Engine gaskets
12. Degas bottle
13. Cylinder block core plugs
14. Cylinder head core plugs
15. Block heater (if equipped)

PINPOINT TEST A: LOSS OF COOLANT

1. A1 CARRY OUT INSPECTION AND VERIFICATION Carry out the «Inspection and Verification»(/mercury/mariner/ii-2011-2011/remont/cooling-system-mechanical/#engine-cooling-hybrid__inspection-and-verification) procedure in this service information. Were any concerns found? Yes: REPAIR as needed. TEST the system for normal operation. No: GO to A2 .
2. A2 CHECK THE ENGINE COOLANT LEVEL NOTE: Allow the engine to cool before checking the engine coolant level. Ignition OFF. Visually inspect the engine coolant level at the degas bottle. Is the engine coolant level within specifications? Yes: GO to A3 . No: ADJUST the engine coolant level as necessary. GO to A3 .
3. A3 PRESSURE TEST THE ENGINE COOLING SYSTEM Pressure test the engine cooling system. Refer to Component Test, «COOLING SYSTEM PRESSURE TEST»(/mercury/mariner/ii-2011-2011/remont/cooling-system-mechanical/#engine-cooling-hybrid__pressure-test) in this service information. Does the engine cooling system leak externally? Yes: REPAIR or INSTALL new components. TEST the system for normal operation. No: GO to A4 .
4. A4 CHECK THE ENGINE COOLANT FOR AN INTERNAL LEAK Inspect the engine coolant in the degas bottle for signs of engine oil. Is engine oil evident in the coolant? Yes: If engine oil is evident, GO to «ENGINE MECHANICAL SYSTEM - GENERAL INFORMATION»(/mercury/mariner/ii-2011-2011/remont/mechanical/#engine-mechanical-system-general-information) article for engine diagnosis. No: GO to A5 .
5. A5 CHECK THE ENGINE OIL FOR COOLANT Remove the oil level indicator from the engine. Is coolant evident in the oil? Yes: If coolant is in the engine oil, GO to «ENGINE MECHANICAL SYSTEM - GENERAL INFORMATION»(/mercury/mariner/ii-2011-2011/remont/mechanical/#engine-mechanical-system-general-information) article for engine diagnosis. No: GO to A6 .
6. A6 CHECK THE COOLING SYSTEM FOR COMBUSTION GASES NOTE: Use UView® Combustion Leak Tester part number UVU560000-R or equivalent. Using a cooling system combustion gas leak tester, following the instructions supplied with the tester, check the coolant for combustion gases. Are combustion gases present? Yes: GO to «ENGINE MECHANICAL SYSTEM - GENERAL INFORMATION»(/mercury/mariner/ii-2011-2011/remont/mechanical/#engine-mechanical-system-general-information) article for engine diagnosis. No: The cooling system is operational.

The engine cooling system maintains engine temperatures during operation. Correct coolant flow through the engine, radiator and remainder of cooling system passages and components is essential to maintaining a correct engine temperature.

Engine coolant flows primarily from the engine to the radiator circuit and back to the coolant pump. Coolant is sent from the coolant pump through the engine block and cylinder heads. A separate circuit from the engine also feeds the heater core with coolant. The coolant pump, operated by engine rotation through a sprocket driven by the timing chain, circulates the coolant. The coolant thermostat is a control valve actuated by coolant temperature. When the thermostat is closed, coolant flow bypasses the radiator circuit and returns to the coolant pump. When the thermostat is opened, coolant is allowed to flow through the radiator circuit in order to transfer engine-generated heat to the outside air.

Engine overheating generally occurs when there is a disruption in the ability to control either coolant flow at the proper rate, the inability to transfer heat from the engine through the coolant (including low coolant), or an inability to transfer engine generated heat to the outside air through the radiator.

For engine specific information, refer to ENGINE COOLING in the Description and Operation portion of this service information.

1. DTC P0217 (Engine Coolant Overtemperature Condition) - Indicates an engine overheat condition was sensed by the Cylinder Head Temperature (CHT) sensor.
2. DTC P1285 (Cylinder Head Overtemperature Condition) - Indicates an engine overheat condition was sensed by the CHT sensor.
3. DTC P1299 (Cylinder Head Overtemperature Protection Active) - Indicates an engine overheat condition was detected by the CHT sensor. A failure mode effects management strategy called failsafe cooling was activated to cool the engine.

This pinpoint test is intended to diagnose the following

1. Low coolant level
2. External engine coolant leak
3. Airlock in system
4. Pressure relief cap installation
5. Restricted airflow through the A/C condenser/radiator
6. Internal engine coolant leak
7. Coolant condition/concentration
8. Accessory drive components
9. Non-OEM engine enhancement components
10. Electric cooling fan
11. Engine Coolant Temperature (ECT) gauge
12. CHT sensor
13. Heater core
14. Coolant pump
15. Coolant flow restriction

PINPOINT TEST B: THE ENGINE OVERHEATS

1. B1 CARRY OUT INSPECTION AND VERIFICATION Carry out the «Inspection and Verification»(/mercury/mariner/ii-2011-2011/remont/cooling-system-mechanical/#engine-cooling-hybrid__inspection-and-verification) procedure in this service information. Were any concerns found? Yes: REPAIR as needed. TEST the system for normal operation. No: GO to B2 .
2. B2 CHECK FOR DTCs Check for DTCs P0217, P1285 or P1299. Is DTC P0217, P1285 or P1299 present? Yes: GO to B3 . No: Actual engine overheating has not been verified. CHECK the engine coolant temperature gauge operation. REFER to «INSTRUMENTATION SYSTEM, MESSAGE CENTER & WARNING CHIMES»(/mercury/mariner/ii-2011-2011/remont/gauges-instrument-panels/#instrumentation-system-message-center-warning-chimes) article. If any other DTCs are retrieved, REFER to «ELECTRONIC ENGINE CONTROLS - HYBRID»(/mercury/mariner/ii-2011-2011/remont/removal-installation/#electronic-engine-controls-hybrid) article.
3. B3 CHECK FOR AN AIRFLOW OBSTRUCTION Check the radiator or A/C condenser for an obstruction such as leaves or cardboard. Is an obstruction present? Yes: REMOVE the obstruction. TEST the system for normal operation. No: GO to B4 .
4. B4 CHECK THE ENGINE COOLANT LEVEL NOTE: Allow the engine to cool before checking the coolant level. Ignition OFF. Visually check the engine coolant level in the degas bottle. Is the engine coolant level within specification? Yes: GO to B5 . No: ADJUST the engine coolant level as necessary. GO to B5 .
5. B5 PRESSURE TEST THE ENGINE COOLING SYSTEM Pressure test the engine cooling system. Refer to Components Tests, «COOLING SYSTEM PRESSURE TEST»(/mercury/mariner/ii-2011-2011/remont/cooling-system-mechanical/#engine-cooling-hybrid__pressure-test) in this service information. Does the engine cooling system leak externally? Yes: REPAIR or INSTALL new components. TEST the system for normal operation. No: GO to B6 .
6. B6 CHECK THE ENGINE COOLANT FOR AN INTERNAL LEAK Inspect the engine coolant in the degas bottle for signs of engine oil. Is engine oil evident in the coolant? Yes: If engine oil is evident, GO to «ENGINE MECHANICAL SYSTEM - GENERAL INFORMATION»(/mercury/mariner/ii-2011-2011/remont/mechanical/#engine-mechanical-system-general-information) article for engine diagnosis. No: GO to B7 .
7. B7 CHECK THE ENGINE OIL FOR COOLANT Remove the oil level indicator from the engine. Is coolant evident in the oil? Yes: If coolant is in the engine oil, GO to «ENGINE MECHANICAL SYSTEM - GENERAL INFORMATION»(/mercury/mariner/ii-2011-2011/remont/mechanical/#engine-mechanical-system-general-information) article for engine diagnosis. No: GO to B8 .
8. B8 CHECK THE COOLING SYSTEM FOR COMBUSTION GASES NOTE: Use UView® Combustion Leak Tester part number UVU560000-R or equivalent. Using a cooling system combustion gas leak tester, following the instructions supplied with the tester, check the coolant for combustion gases. Are combustion gases present? Yes: GO to «ENGINE MECHANICAL SYSTEM - GENERAL INFORMATION»(/mercury/mariner/ii-2011-2011/remont/mechanical/#engine-mechanical-system-general-information) article for engine diagnosis. No: GO to B9 .
9. B9 CHECK COOLANT CONDITION Check the coolant for dirt, rust or contamination and check the coolant concentration. Is the coolant condition OK? Yes: GO to B10 . No: FLUSH the engine cooling system. REFER to «COOLING SYSTEM FLUSHING»(/mercury/mariner/ii-2011-2011/remont/cooling-system-mechanical/#engine-cooling-hybrid) in this service information. TEST the system for normal operation.
10. B10 CHECK THE ELECTRIC COOLING FAN OPERATION Start the engine. Place the climate control function selector in the MAX A/C position and the blower motor switch in the HI position. Did the electric cooling fan operate? Yes: GO to B11 . No: DIAGNOSE the electric cooling fan operation. REFER to «INTRODUCTION»(/mercury/mariner/ii-2011-2011/remont/testing-diagnostics/#engine-controls-introduction-except-diesel-hybrid) article.
11. B11 CHECK THE COOLANT PUMP OPERATION Start the engine. Allow the engine to run for 30 minutes. Place the climate control function selector in the MAX HEAT position. Feel the heater outlet hose. Is the heater outlet hose hot? Yes: GO to B12 . No: INSTALL a new coolant pump. TEST the system for normal operation.
12. B12 CHECK THE THERMOSTAT OPERATION Start the engine. Allow the engine to run for 30 minutes. Feel the lower radiator hose. Is the lower radiator hose hot? Yes: CHECK the engine coolant temperature gauge operation. REFER to «INSTRUMENTATION SYSTEM, MESSAGE CENTER & WARNING CHIMES»(/mercury/mariner/ii-2011-2011/remont/gauges-instrument-panels/#instrumentation-system-message-center-warning-chimes) article. No: GO to B13 .
13. B13 VISUALLY INSPECT THE THERMOSTAT Carry out «Thermostat Visual Inspection»(/mercury/mariner/ii-2011-2011/remont/cooling-system-mechanical/#engine-cooling-hybrid__thermostat-visual-inspection) in the Component Tests portion of this service information. Is the thermostat damaged? Yes: INSTALL a new thermostat. TEST the system for normal operation. No: INSTALL a new thermostat. TEST the system for normal operation. If the engine still overheats, INSTALL a new radiator. TEST the system for normal operation.

The engine cooling system maintains engine temperatures during operation. Correct coolant flow through the engine, radiator and remainder of cooling system passages and components is essential to maintaining a correct engine temperature.

Engine coolant flows primarily from the engine to the radiator circuit and back to the coolant pump. From the coolant pump, coolant is sent through the engine block and cylinder heads. A separate circuit from the engine also feeds the heater core with coolant. The coolant pump, operated by engine rotation through a sprocket which is driven by the timing chain, circulates the coolant. The coolant thermostat is a control valve actuated by coolant temperature. When the thermostat is closed, coolant flow bypasses the radiator circuit and returns to the coolant pump. When the thermostat is opened, coolant flows through the radiator circuit to transfer engine generated heat to the outside air.

Concerns of engine inability to reach normal operating temperature typically occur when the rate of coolant flow through some coolant circuits (radiator, heater core) is more than expected given the conditions, or when the cooling fans operate all the time. Heat is not allowed to build in the engine because a heat exchanger is removing too much heat, including the radiator, heater core and oil cooler. In addition, perceived concerns that the engine does not reach normal operating temperature can be related to a low coolant level or trapped air which does not allow for hot coolant to be available at the heater core, an inoperative climate control system, or for concerns perceived or related to an incorrect engine temperature gauge indication.

For engine specific information, refer to ENGINE COOLING in the Description and Operation portion of this service information.

1. DTC P0125 (Insufficient Coolant Temp for Closed Loop Fuel Control) - Indicates the Cylinder Head Temperature (CHT) sensor has not achieved the required temperature level to enter closed loop operating conditions within a specified amount of time after starting the engine.
2. DTC P0128 (Coolant Thermostat (Coolant Temp Below Thermostat Regulating Temperature)) - Indicates that the thermostat monitor has not achieved the required engine operating temperature within a specified amount of time after starting the engine.

This pinpoint test is intended to diagnose the following

1. Low coolant level
2. Thermostat
3. Engine Coolant Temperature (ECT) gauge
4. Engine cooling fan

PINPOINT TEST C: THE ENGINE DOES NOT REACH NORMAL OPERATING TEMPERATURE

1. C1 CARRY OUT INSPECTION AND VERIFICATION Carry out the «Inspection and Verification»(/mercury/mariner/ii-2011-2011/remont/cooling-system-mechanical/#engine-cooling-hybrid__inspection-and-verification) procedure in this service information. Were any concerns found? Yes: REPAIR as needed. TEST the system for normal operation. No: GO to C2 .
2. C2 CHECK FOR DTCs P0125 or P0128 Check for DTCs P0125 or P0128. Is DTC P0125 or P0128 present? Yes: GO to C3 . No: The cooling system is operational. If an inoperative engine coolant temperature gauge is suspected, CHECK the engine coolant temperature gauge operation. REFER to «INSTRUMENTATION SYSTEM, MESSAGE CENTER & WARNING CHIMES»(/mercury/mariner/ii-2011-2011/remont/gauges-instrument-panels/#instrumentation-system-message-center-warning-chimes) article. If an inoperative climate control system is suspected, CHECK the climate control system operation. Refer to the appropriate service information in «CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS»(/mercury/mariner/ii-2011-2011/remont/automatic-hvac-system/#climate-control-system-general-information-and-diagnostics-hybrid) article for the procedure. If any other DTCs are retrieved, REFER to «ELECTRONIC ENGINE CONTROLS - HYBRID»(/mercury/mariner/ii-2011-2011/remont/removal-installation/#electronic-engine-controls-hybrid) article.
3. C3 CHECK THE ELECTRIC COOLING FAN OPERATION Allow the engine to cool. Make sure the A/C switch is OFF. Start the engine. Check the electric cooling fan. Is the electric cooling fan on all the time? Yes: DIAGNOSE the electric cooling fan operation. REFER to the «INTRODUCTION»(/mercury/mariner/ii-2011-2011/remont/testing-diagnostics/#engine-controls-introduction-except-diesel-hybrid) article. No: GO to C4 .
4. C4 CHECK THE COOLANT LEVEL NOTE: Allow the engine to cool before checking the coolant level. Visually check the engine coolant level in the degas bottle. Is the engine coolant level within specification? Yes: INSTALL a new thermostat. TEST the system for normal operation. No: GO to «PINPOINT TEST A»(/mercury/mariner/ii-2011-2011/remont/cooling-system-mechanical/#engine-cooling-hybrid__pinpoint-test-a-loss-of-coolant) to diagnose a coolant leak.

Pressure Test

Note. Vehicles have the pressure relief cap on the degas bottle and no radiator cap.

Scheme 31

1. Turn the engine OFF.
2. Check the engine coolant level. Adjust the coolant level as necessary.
3. Attach the D-Gas Adapter to the degas bottle nipple and overflow hose. Install the Radiator Tester to the quick connect fitting of the D-Gas Adapter.
4. Slowly press the plunger of the pressure test pump until the pressure gauge reading stops increasing and note the highest pressure reading obtained. If the pressure reading exceeds the maximum cap pressure listed in the specifications table, install a new pressure relief cap.
5. If the system does not hold pressure, remove the pressure relief cap and wash in clean water to dislodge all the foreign material from the gasket. Check the sealing surface in the filler neck of the degas bottle for nicks or cuts. Install the pressure relief cap.
6. Pressurize the engine cooling system as described in Step 4 . Observe the gauge reading for approximately 2 minutes. Pressure should not drop during this time. If the pressure drops within this time, inspect for leaks and repair as necessary.
7. If no leaks are found and the pressure drops. the pressure relief cap may be leaking. Install a new pressure relief cap and retest the system.
8. If no leaks are found after a new pressure relief cap is installed, and the pressure drops, the leak may be internal to the engine. Inspect the coolant for engine oil and the engine oil for coolant. Refer to «ENGINE MECHANICAL SYSTEM - GENERAL INFORMATION»(/mercury/mariner/ii-2011-2011/remont/mechanical/#engine-mechanical-system-general-information) article to diagnose the engine.
9. Release the system pressure by loosening the pressure relief cap. Check the coolant level and adjust as necessary.

Thermostat

A new thermostat should be installed only after the following tests and checks have been carried out

1. Pinpoint Test A, B or C
2. Thermostat Visual Inspection

Thermostat Visual Inspection

1. Remove the thermostat.
2. Examine the thermostat for signs of damage including: Valve not fully seated (light visible through the valve) Foreign material lodged in the main valve Bent or broken frame or flange Bent or broken spring Bent or broken valve or valve stem Wax leaking from wax reservoir or a bulge in the reservoir Any other damage or distortion
3. If damage is found during the inspection, remove any foreign material or broken pieces and install anew thermostat.
4. If no damage is found during the inspection, continue troubleshooting the system concern. Go to the «SYMPTOM CHART»(/mercury/mariner/ii-2011-2011/remont/cooling-system-mechanical/#engine-cooling-hybrid__symptom-chart) for further instructions.

Radiator Leak Test, Removed From Vehicle

Note. Never leak test an aluminum radiator in the same water that copper/brass radiators are tested in. Flux and caustic cleaners may be present in the cleaning tank and they will damage aluminum radiators.

Note. Clean the radiator before leak testing to avoid contamination of tank.

Leak test the radiator in clean water with air pressurized to the maximum pressure listed in the specifications.

SPECIAL TOOLS Airlift Cooling System Tester UVU550000 or equivalent

Scheme 32

MATERIAL SPECIFICATIONS

Draining

Note. The coolant must be recovered in a suitable, clean container for reuse. If the coolant is contaminated, it must be recycled or disposed of correctly. Using contaminated coolant may result in damage to the engine or cooling system components.

Note. Early build vehicle cooling systems are filled with Motorcraft® Premium Gold Engine Coolant. Late build vehicle cooling systems are filled with Motorcraft® Specialty Orange Engine Coolant. Do not mix coolant types. Mixing coolant types degrades the corrosion protection of the coolant. Failure to follow these instructions may damage the engine or cooling system.

Note. Always fill the cooling system with the manufacturer's specified coolant. Chemically flush the cooling system if a non-specified coolant has been used. Refer to COOLING SYSTEM FLUSHING in this service information. Failure to follow these instructions may damage the engine or cooling system.

Note. If cooling system stop leak pellets are used, Motorcraft® Premium Gold Engine Coolant may darken from yellow to golden tan.

Note. During normal vehicle operation, Motorcraft® Specialty Orange Engine Coolant may change color from orange to pink or light red. As long as the engine coolant is clear and uncontaminated, this color change does not indicate the engine coolant has degraded nor does it require the engine coolant to be drained, the system to be flushed, or the engine coolant to be replaced.

Note. Less than 80% of coolant capacity can be recovered with the engine in the vehicle. Dirty, rusty or contaminated coolant requires replacement.

Scheme 33

1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to «JACKING & LIFTING»(/mercury/mariner/ii-2011-2011/remont/hoistjack/#jacking-lifting) article.
2. Release the pressure in the cooling system by slowly turning the pressure relief cap one-half turn counterclockwise. When the pressure is released, remove the pressure relief cap.
3. Remove the 7 retainers and the LH splash shields.
4. Place a suitable container below the radiator draincock. Open the draincock and allow to drain. Close the draincock after draining.

Filling and Bleeding with a Vacuum Cooling System Filler

Note. Early build vehicle cooling systems are filled with Motorcraft® Premium Gold Engine Coolant. Late build vehicle cooling systems are filled with Motorcraft® Specialty Orange Engine Coolant. Do not mix coolant types. Mixing coolant types degrades the corrosion protection of the coolant. Failure to follow these instructions may damage the engine or cooling system.

Note. Engine coolant provides boil protection, corrosion protection, freeze protection, and cooling efficiency to the engine and cooling components. In order to obtain these protections, maintain the engine coolant at the correct concentration and fluid level in the degas bottle. To maintain the integrity of the coolant and the cooling system: Add Motorcraft® Premium Gold Engine Coolant or equivalent meeting Ford specification WSS-M97B51-A1 or Motorcraft® Specialty Orange Engine Coolant or equivalent meeting Ford specification WSS-M97B44-D. Use the same type of coolant that was originally used to fill the cooling system. Do not mix coolant types. Do not add or mix with any other type of engine coolant. Mixing coolants may degrade the coolant's corrosion protection. Do not add alcohol, methanol, or brine, or any engine coolants mixed with alcohol or methanol antifreeze. These can cause engine damage from overheating or freezing. Ford Motor Company does NOT recommend the use of recycled engine coolant in vehicles originally equipped with Motorcraft® Premium Gold Engine Coolant or Motorcraft® Specialty Orange Engine Coolant since a Ford-approved recycling process is not yet available.

Note. If cooling system stop leak pellets are used, Motorcraft® Premium Gold Engine Coolant may darken from yellow to golden tan.

Scheme 34

1. Install the LH splash shield and the 7 retainers.
2. Install the vacuum cooling system filler and follow the manufacturer's instructions to fill and bleed the cooling system. Recommended coolant concentration is 50/50 engine coolant to distilled water. For extremely cold climates (less than -37°C [-34°F]): It may be necessary to increase the coolant concentration above 50%. NEVER increase the coolant concentration above 60%. Maximum coolant concentration is 60/40 for cold weather areas. A coolant concentration of 60% provides freeze point protection down to -50°C (-58°F). Engine coolant concentration above 60% decreases the overheat protection characteristics of the engine coolant and may damage the engine. For extremely hot climates: It is still necessary to maintain the coolant concentration above 40%. NEVER decrease the coolant concentration below 40%. Minimum coolant concentration is 40/60 for warm weather areas. A coolant concentration of 40% provides freeze point protection down to -26°C (-15°F). Engine coolant concentration below 40% decreases the corrosion and freeze protection characteristics of the engine coolant and may damage the engine. Vehicles driven year-round in non-extreme climates should use a 50/50 mixture of engine coolant and distilled water for optimum cooling system and engine protection.

Filling and Bleeding without a Vacuum Cooling System Filler

Note. Early build vehicle cooling systems are filled with Motorcraft® Premium Gold Engine Coolant. Late build vehicle cooling systems are filled with Motorcraft® Specialty Orange Engine Coolant. Do not mix coolant types. Mixing coolant types degrades the corrosion protection of the coolant. Failure to follow these instructions may damage the engine or cooling system.

Note. Engine coolant provides freeze protection, boil protection, cooling efficiency and corrosion protection to the engine and cooling components. In order to obtain these protections, the engine coolant must be maintained at the correct concentration and fluid level in the degas bottle. To maintain the integrity of the coolant and the cooling system: Add Motorcraft® Premium Gold Engine Coolant or equivalent meeting Ford specification WSS-M97B51-A1 or Motorcraft® Specialty Orange Engine Coolant or equivalent meeting Ford specification WSS-M97B44-D. Use the same type of coolant that was originally used to fill the cooling system. Do not mix coolant types. Do not add or mix with any other type of engine coolant. Mixing coolants may degrade the coolant's corrosion protection. Do not add alcohol, methanol, or brine, or any engine coolants mixed with alcohol or methanol antifreeze. These can cause engine damage from overheating or freezing. Ford Motor Company does NOT recommend the use of recycled engine coolant in vehicles originally equipped with Motorcraft® Premium Gold Engine Coolant or Motorcraft® Specialty Orange Engine Coolant since a Ford-approved recycling process is not yet available.

Note. If cooling system stop leak pellets are used, Motorcraft® Premium Gold Engine Coolant may darken from yellow to golden tan.

1. Install the LH splash shield and the 7 retainers.
2. Add the correct engine coolant mixture to the degas bottle until the coolant level is between the COOLANT FILL LEVEL marks. Recommended coolant concentration is 50/50 engine coolant to distilled water. For extremely cold climates (less than -37°C [-34°F]): It may be necessary to increase the coolant concentration above 50%. NEVER increase the coolant concentration above 60%. Maximum coolant concentration is 60/40 for cold weather areas. A coolant concentration of 60% provides freeze point protection down to -50°C (-58°F). Engine coolant concentration above 60% decreases the overheat protection characteristics of the engine coolant and may damage the engine. For extremely hot climates: It is still necessary to maintain the coolant concentration above 40%. NEVER decrease the coolant concentration below 40%. Minimum coolant concentration is 40/60 for warm weather areas. A coolant concentration of 40% provides freeze point protection down to -26°C (-15°F). Engine coolant concentration below 40% decreases the corrosion and freeze protection characteristics of the engine coolant and may damage the engine. Vehicles driven year-round in non-extreme climates should use a 50/50 mixture of engine coolant and distilled water for optimum cooling system and engine protection.
3. Select the maximum heater temperature and blower motor speed settings. Position the control to discharge air at vents in the instrument panel.
4. Start the engine and allow to idle. While engine is idling, feel for hot air at vents.
5. Start the engine and allow to idle until normal operating temperature is reached. Hot air should discharge from vents. The Engine Coolant Temperature (ECT) gauge should maintain a stabilized reading in the middle of the NORMAL range and the upper radiator hose should feel hot to the touch.
6. Shut the engine OFF and allow to cool.
7. Check the engine for coolant leaks.
8. Check the engine coolant level in degas bottle and fill as necessary.

MATERIAL SPECIFICATIONS

Note. To remove rust, sludge and other foreign material from the cooling system, use cooling system flush that is safe for use with aluminum radiators. For additional information, refer to SPECIFICATIONS . This cleaning restores cooling system efficiency and helps prevent overheating. A pulsating or reversed direction of flushing water will loosen sediment more quickly than a steady flow in the normal coolant flow direction. In severe cases where cleaning solvents will not clean the cooling system efficiently, it will be necessary to use the pressure flushing method using cooling system flusher. Dispose of old coolant and flushing water contaminated with antifreeze and cleaning chemicals in accordance with local, state or federal laws.

1. Add Premium Cooling System Flush to the cooling system and follow the directions on the package.
2. Drain the cooling system. For additional information, refer to «COOLING SYSTEM DRAINING, FILLING AND BLEEDING»(/mercury/mariner/ii-2011-2011/remont/cooling-system-mechanical/#engine-cooling-hybrid) in this service information.
3. Remove the radiator. For additional information, refer to «RADIATOR»(/mercury/mariner/ii-2011-2011/remont/cooling-system-mechanical/#engine-cooling-hybrid) in this service information.
4. Backflush the radiator with the radiator in an upside-down position and a high-pressure hose in the lower hose location.
5. Remove the thermostat housing. For additional information, refer to «THERMOSTAT HOUSING»(/mercury/mariner/ii-2011-2011/remont/cooling-system-mechanical/#engine-cooling-hybrid) in this service information.
6. Position a high-pressure water hose into the engine through the upper radiator hose and backflush the engine.
7. Install the thermostat housing. For additional information, refer to «THERMOSTAT HOUSING»(/mercury/mariner/ii-2011-2011/remont/cooling-system-mechanical/#engine-cooling-hybrid) in this service information.
8. Install the radiator. For additional information, refer to «RADIATOR»(/mercury/mariner/ii-2011-2011/remont/cooling-system-mechanical/#engine-cooling-hybrid) in this service information.
9. Fill and bleed the cooling system. For additional information, refer to «COOLING SYSTEM DRAINING, FILLING AND BLEEDING»(/mercury/mariner/ii-2011-2011/remont/cooling-system-mechanical/#engine-cooling-hybrid) in this service information.

Scheme 35

ITEM DESCRIPTION

Removal and Installation

Note. The thermostat and thermostat housing are serviced as an assembly.

1. Drain the cooling system. For additional information, refer to «COOLING SYSTEM DRAINING, FILLING AND BLEEDING»(/mercury/mariner/ii-2011-2011/remont/cooling-system-mechanical/#engine-cooling-hybrid) in this service information.
2. Remove the accessory drive belt tensioner. For additional information, refer to «ACCESSORY DRIVE - HYBRID»(/mercury/mariner/ii-2011-2011/remont/accessory-drive-belts/#accessory-drive-system-25l-hybrid) article.
3. Disconnect the Knock Sensor (KS) electrical connector. Detach the KS wiring harness pin-type retainer.
4. Disconnect the heater hose at the thermostat housing.
5. Disconnect the lower radiator hose at the thermostat housing.
6. Remove the 3 bolts and the thermostat housing. Remove and discard the gasket. To install, tighten to 10 Nm (89 lb-in).
7. To install, reverse the removal procedure. Install a new gasket.
8. Fill and bleed the cooling system. For additional information, refer to «COOLING SYSTEM DRAINING, FILLING AND BLEEDING»(/mercury/mariner/ii-2011-2011/remont/cooling-system-mechanical/#engine-cooling-hybrid) in this service information.

Scheme 36

ITEM DESCRIPTION

1. Drain the cooling system. For additional information, refer to «COOLING SYSTEM DRAINING, FILLING AND BLEEDING»(/mercury/mariner/ii-2011-2011/remont/cooling-system-mechanical/#engine-cooling-hybrid) in this service information.
2. Remove the intake manifold. For additional information, refer to «ENGINE MECHANICAL - 2.5L HYBRID»(/mercury/mariner/ii-2011-2011/remont/mechanical/#engine-mechanical-25l-hybrid) article.
3. Disconnect and remove the coolant bypass tube.
4. To install, reverse the removal procedure.
5. Fill and bleed the cooling system. For additional information, refer to «COOLING SYSTEM DRAINING, FILLING AND BLEEDING»(/mercury/mariner/ii-2011-2011/remont/cooling-system-mechanical/#engine-cooling-hybrid) in this service information.

MATERIAL SPECIFICATIONS

Scheme 37

ITEM DESCRIPTION

1. Drain the cooling system. For additional information, refer to «COOLING SYSTEM DRAINING, FILLING AND BLEEDING»(/mercury/mariner/ii-2011-2011/remont/cooling-system-mechanical/#engine-cooling-hybrid) in this service information.
2. Remove the degas bottle. For additional information, refer to «DEGAS BOTTLE»(/mercury/mariner/ii-2011-2011/remont/cooling-system-mechanical/#engine-cooling-hybrid) in this service information.
3. Remove the accessory drive belt. For additional information, refer to «ACCESSORY DRIVE - HYBRID»(/mercury/mariner/ii-2011-2011/remont/accessory-drive-belts/#accessory-drive-system-25l-hybrid) article.
4. Remove the 3 bolts and the coolant pump pulley. To install, tighten to 20 Nm (177 lb-in).
5. Remove the 3 bolts and the coolant pump. Remove and discard the O-ring seal. To install, tighten to 10 Nm (89 lb-in).
6. To install, reverse the removal procedure. Lubricate the O-ring seal with clean engine coolant. Use the same type of coolant that was drained from the system.
7. Fill and bleed the cooling system. For additional information, refer to «COOLING SYSTEM DRAINING, FILLING AND BLEEDING»(/mercury/mariner/ii-2011-2011/remont/cooling-system-mechanical/#engine-cooling-hybrid) in this service information.

Scheme 38

ITEM DESCRIPTION

1. With vehicle in NEUTRAL, position it on a hoist. For additional information, refer to «JACKING & LIFTING»(/mercury/mariner/ii-2011-2011/remont/hoistjack/#jacking-lifting) article.
2. Remove the front bumper cover. For additional information, refer to «BUMPER SYSTEM»(/mercury/mariner/ii-2011-2011/remont/exterior-body-panels/#bumper-system) article.
3. Remove the 2 front impact severity sensors. For additional information, refer to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-434537) article.
4. Remove the 4 bolts and the 2 radiator brackets. To install, tighten to 10 Nm (89 lb-in).
5. Remove the 2 bolts, the nut and position aside the hood latch. To install, tighten to 9 Nm (80 lb-in).
6. Remove the center support lower bolt. To install, tighten to 10 Nm (89 lb-in).
7. Remove the bolt and the center support. To install, tighten to 10 Nm (89 lb-in).
8. Remove the 2 bolts and position the auxiliary coolant pump aside. To install, tighten to 7 Nm (62 lb-in).
9. Disconnect the cooling fan resistor electrical connector.
10. Disconnect the 2 cooling fan electrical connectors.
11. Remove the 6 cooling fan bolts. To install, tighten to 8 Nm (71 lb-in).
12. Remove the LH and the RH cooling fans.
13. To install, reverse the removal procedure.

Scheme 39

ITEM DESCRIPTION

Scheme 40

ITEM DESCRIPTION

See also:
• CLIMATE CONTROL
• CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS - HYBRID
• TRANSAXLE/TRANSMISSION COOLING - HYBRID
• ENGINE MECHANICAL SYSTEM - GENERAL INFORMATION
• MODULE COMMUNICATIONS NETWORK
• ELECTRONIC ENGINE CONTROLS - HYBRID
• INTRODUCTION
• INSTRUMENTATION SYSTEM, MESSAGE CENTER & WARNING CHIMES
• JACKING & LIFTING
• ACCESSORY DRIVE - HYBRID
• ENGINE MECHANICAL - 2.5L HYBRID
• BUMPER SYSTEM
• ENGINE COOLING
• PCM DTC CHART
• SYMPTOM CHART
• PINPOINT TEST B
• PINPOINT TEST C
• PINPOINT TEST A
• Inspection and Verification
• COOLING SYSTEM PRESSURE TEST
• Thermostat Visual Inspection