Electro Daewoo Lanos
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ScribdTranslationsElectro Daewoo Lanos
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ScribdTranslationsDescription of the circuit
The engine cooling fan circuit operates the cooling fan.
Cooling fan is controlled by the electronic control module (ECM) based on the
coolant temperature sensor input (CTS). The ECM controls the operation of the
low-speed cooling fan connecting the internal ground terminal A9 of the
ECM connector. This energizes the low-speed cooling fan relay and operates the
low speed cooling fan. The operation of the low speed cooling fan
speed is achieved through the resistance of the cooling fan which causes a drop in the
voltage supplied to the cooling fan. The ECM controls the operation of
high-speed cooling fan connecting internally to terminal B4 of
ECM connector. This energizes the high-speed cooling fan relay, without passing
due to the resistance of the radiator fan. This results in a functioning of the
high-speed cooling fan.
Diagnostic aids
If the owner complained about an overheating problem, it should be determined whether the complaint
it was due to an actual boiling or if the engine coolant temperature gauge indicated a
overheating. If the engine overheats and the cooling fans are
If lit, the cooling system should be checked.
If the F19 fuse of the I/P fuse block or the EF4 fuse of the engine fuse block is
They open (they fuse) immediately after installation, check for a short to ground.
in the wiring of the corresponding circuit. If the fuses open (blow) when the ECM
you must turn on the cooling fan, suspect that the fan motor
Cooling is defective.
The ECM will turn on the cooling fans at low speed when the temperature of the
The refrigerant reaches 93 °C (199 °F). The ECM will turn off the cooling fans when the
the coolant temperature is 90 ° C (194 ° F).
The ECM will turn on the cooling fans at high speed when the temperature of
the refrigerant to 97 °C (207 °F). The ECM will change the high cooling fans.
low speed when the coolant temperature is 94 °C (201 °F).
The cooling fan circuit can be quickly checked by disconnecting the
24-pin connector of the ECM and connecting ground to terminal A9 of the connector. This should
create a termination
Operating speed of the cooling fan with the switch ON. When connected to
ground terminals A9 and B4 of the ECM connector and turn the ignition to ON, it should achieve the
operation of the high-speed cooling fan.
Test Description
The following numbers refer to the steps of the diagnostic table.
4. This step, along with Step 5, verifies the ECM's ability to operate the fans.
cooling.
22. By connecting directly, ground the terminals A9 and B4 of the ECM connector, the fan of
Cooling must operate at high speed.
VERIFICATION OF THE FAN CIRCUIT OF
ENGINE COOLING - WITH A / C (1.3LAND 1.5L SOHC IEFI-6)
Description of the circuit
The engine cooling fan circuit operates the main cooling fan and
the auxiliary cooling fan. The cooling fans are controlled by the
electronic control module (ECM) based on the inputs from the temperature sensor of
refrigerant (CTS) and the air conditioning pressure sensor (ACP). The ECM controls the
operation of the low-speed cooling fan by connecting to ground
internally the terminal A9 of the ECM connector. This energizes the fan relay
low-speed cooling and operates the main cooling fan and the fan
auxiliary low-speed cooling when the cooling fans are connected
in a series circuit. The ECM controls the operation of the high cooling fan.
speed connecting internally terminal A9 of the ECM connector and terminal B4
from the ECM connector in
at the same time. This energizes the low speed cooling fan relay, the relay of
high-speed cooling fan and the cooling fan relay in series /
parallel, which results in the fan operating at high speed, since the
Cooling fans are now connected in a parallel circuit.
Diagnostic aids
If the owner complained about an overheating issue, it must be determined whether the complaint
it was due to a real boiling or if the engine coolant temperature gauge indicated a
overheating. If the engine overheats and the cooling fans are
If they are on, the cooling system should be checked.
If the EF4 fuses in the engine fuse block blow (burn out) immediately
After installation, check for a short to ground in the circuit wiring.
corresponding. If the fuses open (blow) when the ECM is supposed to turn on the
cooling fans, I suspect that the cooling fan motor is
defective.
The ECM will turn on the cooling fans at low speed when the temperature of the
refrigerant reaches 97 °C (207 °F). The ECM will turn off the cooling fans when the
the coolant temperature is 94 °C (201 °F).
The ECM will turn on the cooling fans at high speed when the temperature of
coolant at 101 °C (214 °F). The ECM will change the high cooling fans.
low speed when the coolant temperature is 98 °C (208 °F).
The ECM will turn on the cooling fans at low speed when the air system
air conditioner (A / C) is on. The ECM will switch the low cooling fans.
speed at high speed when the air conditioning pressure on the high side is 1882 kPa
(273 psi), then it will return to low speed when the air conditioning pressure on the high side
sea 1448 kPa (210 psi). When the A/C system is on, the ECM will change the
cooling fans from low to high speed when the refrigerant
the temperature reaches 117 °C (243 °F) and then goes back to
low speed when the coolant temperature reaches 114 °C (237 °F).
The cooling fan circuit can be quickly checked by disconnecting the
red connector of the ECM and connecting to ground the
A9 connector terminal. This should create the operation of the cooling fan.
low speed with the ignition ON. Connecting ground the terminals A9 and B4 of the connector
from the ECM and setting the ignition to ON, the operation of the fan must be achieved
high-speed cooling.
Description of the test
The following numbers refer to the steps of the diagnosis table.
4. This step, along with Step 5, verifies the ability of the ECM to operate the fans.
cooling.
8. This step, along with Step 9, verifies the ECM's ability to operate the fans.
cooling in response to the A/C pressure readings.
16. After confirming the battery voltage and the ECM providing ground to the coil side.
from the low-speed cooling fan relay, bridge terminals 30 and 87 of the
connector to determine if the relay fails or if there is a wiring problem.
31. This step verifies the presence of battery voltage in the cooling fan.
main when the A/C is on. If there is battery voltage and the fans
Cooling is not working, the problem is on the ground side of the fan circuit.
of cooling.
37. By directly connecting, ground terminals A9 and B4 of the ECM connector, the fans
The main and auxiliary cooling systems must operate at high speed.