2GR-FE ENGINE CONTROL SYSTEM
– SFI SYSTEM
ES–159
ES
DESCRIPTION
A thermistor is built into the Engine Coolant Temperature (ECT) sensor, of which the resistance value
varies according to the ECT.
The structure of the sensor and its connection to the ECM are the same as those of the Intake Air
Temperature (IAT) sensor.
MONITOR DESCRIPTION
The ECT sensor is used to monitor the ECT. The ECT sensor has a built-in thermistor with a resistance
that varies according to the temperature of the engine coolant. When the ECT drops, the resistance of the
thermistor increases. When the temperature rises, the resistance drops. These variations in the
resistance are reflected in the output voltage from the ECT sensor.
The ECM monitors the sensor voltage and uses this value to calculate the ECT. If the sensor output
voltage deviates from the normal operating range, the ECM interprets this deviation as a malfunction in
the ECT sensor and sets the DTC.
Examples:
(1)Upon starting the engine, the ECT is between 35
°
C and 60
°
C (95
°
F and 140
°
F). If, after driving for
250 seconds, the ECT remains within 3
°
C (5.4
°
F) of the starting temperature, the DTC is set (2 trip
detection logic).
(2)Upon starting the engine, the ECT is over 60
°
C (140
°
F). If, after driving for 250 seconds, the ECM
remains within 1
°
C (1.8
°
F) of the starting temperature, the DTC is set (6 trip detection logic).
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
All:
DTC
P0116
Engine Coolant Temperature Circuit Range /
Performance Problem
DTC No.
DTC Detection Condition
Trouble Area
P0116
ECTs as listed below are nearly same (2 trip detection
logic):
–
ECT when engine is started at lower than 60
°
C
(140
°
F) of ECT
–
ECT when engine is warmed up
•
Thermostat
•
ECT sensor
ECTs as listed below are nearly same when engine is
started at higher than 60
°
C (140
°
F) of ECT (2 trip
detection logic)
–
ECT when engine is stopped after driving
–
ECT when engine is started at lower than 60
°
C
(140
°
F) of ECT
Related DTCs
P0116: Engine coolant temperature sensor rationality (ECT sensor
cold start monitor)
P0116: Engine coolant temperature sensor rationality (ECT sensor
soak monitor)
Required Sensors/Components (Main)
Engine coolant temperature (ECT) sensor
Required Sensors/Components (Sub)
-
Frequency of Operation
Once per driving cycle
Duration
10
MIL Operation
2 driving cycles
Sequence of Operation
None
Monitor runs whenever following DTCs are not present
P0100 - P0103 (MAF sensor)
Содержание 2GR-FE
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Страница 247: ...2GR FE ENGINE CONTROL SYSTEM SFI SYSTEM ES 91 ES OK REPLACE ECM See page ES 518 ...
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Страница 556: ...ES 400 2GR FE ENGINE CONTROL SYSTEM SFI SYSTEM ES A REPLACE TCM ...
Страница 630: ...ES 474 2GR FE ENGINE CONTROL SYSTEM SFI SYSTEM ES OK REPLACE ECM See page ES 518 ...
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Страница 658: ...2GR FE ENGINE CONTROL SYSTEM VVT SENSOR ES 493 ES 22 INSTALL ENGINE UNDER COVER LH ...
Страница 719: ...FU 6 2GR FE FUEL FUEL SYSTEM FU PARTS LOCATION ENGINE ROOM RELAY BLOCK ECM FUEL INJECTOR FUEL PUMP A136014E01 ...
Страница 897: ...2GR FE STARTING SMART KEY SYSTEM ST 35 ST OK REPLACE MAIN BODY ECU ...
Страница 923: ...2GR FE STARTING SMART KEY SYSTEM ST 61 ST OK REPLACE MAIN BODY ECU ...
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Страница 958: ...ST 96 2GR FE STARTING SMART KEY SYSTEM ST OK END MAIN BODY ECU DEFECTIVE ...