SSANGYONG Rexton Y200 Manual page 483

1F1-56 M162 ENGINE CONTROLS
Failure
Description
Code
Engine coolant
00
temperature sensor low
voltage
Engine coolant
temperature sensor high
01
voltage
Engine coolant
temperature sensor
02
plausibility
Engine coolant
temperature insufficient
for closed loop fuel
06
control
Circuit Description
The ECT sensor uses a thermistor to control the signal voltage to the ECM. The ECM supplies a voltage on the
signal circuit to the sensor. When the engine coolant is cold, the resistance is high; therefore the ECT signal
voltage will be high
Engine Coolant Temperature Sensor Inspection
1. Turn the ignition switch to "ON" position.
2. Measure the voltage between the ECM pin No. 78 and No. 79.
Temperature (°C)
20
80
100
Trouble Area
ECT sensor short circuit to
ground or open
ECT sensor short circuit to
power
Malfunction in recognition of
ECT
When drop to about 50 ° C
below after warm up
Malfunction in recognition of
ECT
When minimum temperature
for lambda control after
warm up
Specified Value (V)
3.57
1.22
0.78
Maintenance Hint
•
Monitoring the actual coolant temperature
through scan tool
•
Inspection the ECM pin 78, 79 about
short circuit or open with bad contact
•
Inspection the ECT sensor
•
Inspection the ECM
YAD1F470
SSANGYONG Y200