–

Cooling  Fan  High-Speed  Circuit  Description:  The  engine
control  module  receives  the  engine  coolant  temperature
sensor  and  air  pressure  switch  signals.  ECM  monitors
conditions  that  meet  the  cooling  fan  how-speed  running
conditions,  ECM  controls  the  engine  wiring  harness
connector  EN01  terminal  No.52  internal  ground,  and  the
how-speed cooling fan relay pull-in. Power passes through
the how speed relay terminal No.87 to reach the cooling fan
wiring  harness  connector  CA16  terminal  No.2  and  then
through the speed limit resistor, and finally reaches to the
paralleled  two  fan  motors.  Fan  motors  negative  is
connected  to  the  ground  through  the  cooling  fan  wiring
harness  connector  CA16  terminal  No.3.  Therefore,  the
how-speed fan motor starts running.

Engine

Cooling System JL4G18-D

2-459

2.8.4 Component Locator
2.8.4.1 Component Locator

2

1

3

4

5

FE02-2035b

Legend

1. Cooling Fan
2. Radiator Assembly
3. Thermostat
4. Pump

5. Coolant Recovery Reservoir

2-460

Cooling System JL4G18-D

Engine

2.8.5 Disassemble View
2.8.5.1 Disassemble View

FE02-2036b

1

2

3

4

5

7

8

9

10

11

12

13

14

15

16

17

18

19

20

6

Legend

1. Thermostat
2. Engine Coolant Inlet Component
3. Cooling Fan Shroud
4. Fan Motor
5. Fan Blades
6. Radiator Inlet Hose
7. Radiator
8. Radiator Upper Mounting Brackets
9. Radiator Cap
10. Engine Coolant Outlet Valve
11. Radiator Lower Vibration Pad

12. Radiator Overflow Pipe
13. Coolant Recovery Reservoir Pressure Cap
14. Radiator Outlet Hose
15. Coolant Recovery Reservoir
16. Fan Low-Speed Current-Limiting Resistor
17. Water Pump
18. Water Pump Bolts
19. Fan Motor Retaining Bolt
20. Fan Motor Retaining Nut

Engine

Cooling System JL4G18-D

2-461

2.8.6 Schematic
2.8.6.1 Schematic

Engine Coolant 

Temperature Sensor

A/C Signal

Air Conditioning 

Pressure Sensor

Cooling Fan Low 

Speed Relay

Cooling Fan High 

Speed Relay

Cooling Fan Motor

FE02-2037b

2-462

Cooling System JL4G18-D

Engine