2GR-FE ENGINE CONTROL SYSTEM
– SFI SYSTEM
ES–173
ES
DESCRIPTION
A thermistor is built into the Engine Coolant Temperature (ECT) sensor, and its 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 resistance of the ECT varies in proportion to the actual ECT. The ECT supplies a constant voltage to
the sensor and monitors the signal output voltage of the sensor. The signal voltage output varies
according to the changing resistance of the sensor. After the engine is started, the ECT is monitored
through this signal. If the ECT sensor indicates that the engine is not yet warm enough for closed-loop fuel
control, despite a specified period of time having elapsed since the engine was started, the ECM
interprets this as a malfunction in the sensor or cooling system and sets the DTC.
Example:
The ECT is 0
°
C (32
°
F) at engine start. After 5 minutes running time, the ECT sensor still indicates that
the engine is not warm enough to begin closed-loop fuel (air-fuel ratio feedback) control. The ECM
interprets this as a malfunction in the sensor or cooling system and sets the DTC.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
DTC
P0125
Insufficient Coolant Temperature for Closed
Loop Fuel Control
DTC No.
DTC Detection Condition
Trouble Area
P0125
Engine coolant temperature (ECT) does not reach
closed-loop enabling temperature for 20 minutes (this
period varies with ECT when engine start)
•
Engine coolant temperature sensor
•
Cooling system
•
Thermostat
Related DTCs
P0125: Insufficient engine coolant temperature for closed-loop fuel control
Required Sensors/Components (Main)
Thermostat, cooling system
Required Sensors/Components (Related)
Engine coolant temperature sensor and mass air flow meter
Frequency of Operation
Once per driving cycle
Duration
64 seconds: Closed-loop enabling temperature - 8.34
°
C (15
°
F) or more
111.2 seconds: Closed-loop enabling temperature - 19.45 to 8.34
°
C (35 to
15
°
F)
1,200 seconds: Less than closed-loop enabling temperature - 19.45
°
C (35
°
F)
MIL Operation
2 driving cycles
Sequence of Operation
None
Monitor runs whenever following DTCs are not present
P0100 - P0103 (MAF sensor)
P0110 - P0113 (IAT sensor)
P0115 - P0118 (ECT sensor)
MAF sensor circuit fail
Not detected
IAT sensor circuit fail
Not detected
ECT sensor circuit fail
Not detected
Thermostat fail
Not detected
Содержание 2GR-FE
Страница 176: ...ES 20 2GR FE ENGINE CONTROL SYSTEM SFI SYSTEM ES NEXT 20 CONDUCT CONFIRMATION TEST END ...
Страница 247: ...2GR FE ENGINE CONTROL SYSTEM SFI SYSTEM ES 91 ES OK REPLACE ECM See page ES 518 ...
Страница 412: ...ES 256 2GR FE ENGINE CONTROL SYSTEM SFI SYSTEM ES A END ...
Страница 447: ...2GR FE ENGINE CONTROL SYSTEM SFI SYSTEM ES 291 ES OK REPLACE ECM See page ES 518 ...
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 ...
Страница 651: ...2GR FE ENGINE CONTROL SYSTEM CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY ES 487 ES 22 INSTALL ENGINE UNDER COVER LH ...
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 ...
Страница 935: ...2GR FE STARTING SMART KEY SYSTEM ST 73 ST OK REPLACE MAIN BODY ECU ...
Страница 940: ...ST 78 2GR FE STARTING SMART KEY SYSTEM ST OK REPLACE MAIN BODY ECU ...
Страница 958: ...ST 96 2GR FE STARTING SMART KEY SYSTEM ST OK END MAIN BODY ECU DEFECTIVE ...