ES–300
2GR-FE ENGINE CONTROL SYSTEM
– SFI SYSTEM
ES
The ECM monitors the intake air amount during idling and the ignition timing.
When the Engine Coolant Temperature (ECT) is between -10
°
C and 50
°
C (14
°
F and 122
°
F), the ECM
calculates the idling intake air amount for 10 seconds, beginning 3 seconds after the engine starts.
When the accumulated value is below the threshold, the ECM interprets this as a malfunction in the Idle
Speed Control (ISC) system at cold start.
The ECM also monitors the ignition timing at cold start, and judges it to be incorrect when it is advanced to
the same value for a warm engine for 5 seconds or more of the 10 second monitoring period.
Example:
P050A is detected when all conditions below are met (2 trip detection logic).
1. The ECT is between -10
°
C and 50
°
C (14
°
F and 122
°
F) when the engine starts.
2. The engine idles for 13 seconds after engine start.
3. The accumulated intake air amount is below the threshold.
The ECM sets the DTC and illuminates the MIL 13 seconds after the engine is next started.
NOTICE:
When the negative battery terminal is disconnected during inspection or repairs, the ISC learning
values are cleared. The ISC learning must be performed by warming up the engine and idling for 5
minutes with the ECT at 75
°
C (167
°
F) or more because DTCs cannot be detected with the ISC
learning values cleared.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
P050A:
P050B:
Related DTCs
P050A: Idle speed control problem at cold
P050B: Idle ignition timing problem at cold
Required Sensors/Components (Main)
Mass air flow meter
Required Sensors/Components (Related)
Engine Coolant Temperature (ECT) sensor, Throttle position sensor,
Vehicle speed sensor
Frequency of Operation
Once per driving cycle
Duration
10 seconds
MIL Operation
2 driving cycles
Sequence of Operation
None
Battery voltage
8 V or more
Time after engine start
3 seconds or more
Starter
OFF
ECT at engine start
-10
°
C (14
°
F) or more
ECT
-10
°
C to 50
°
C (14
°
F to 122
°
F)
Engine idling time
3 seconds or more
Fuel-cut
OFF
Vehicle speed
Less than 1.875 mph (3 km/h)
Time after shift position changed
1 second or more
Atmospheric pressure
76 kPa (570 mmHg) or more
Battery voltage
8 V or more
Time after engine start
3 seconds or more
Starter
OFF
ECT at engine start
-10
°
C (14
°
F) or more
ECT
-10
°
C to 50
°
C (14
°
F to 122
°
F)
Engine idling time
3 seconds or more
Fuel-cut
OFF
Vehicle speed
Less than 1.875 mph (3 km/h)
Summary of Contents for 2GR-FE
Page 176: ...ES 20 2GR FE ENGINE CONTROL SYSTEM SFI SYSTEM ES NEXT 20 CONDUCT CONFIRMATION TEST END ...
Page 247: ...2GR FE ENGINE CONTROL SYSTEM SFI SYSTEM ES 91 ES OK REPLACE ECM See page ES 518 ...
Page 412: ...ES 256 2GR FE ENGINE CONTROL SYSTEM SFI SYSTEM ES A END ...
Page 447: ...2GR FE ENGINE CONTROL SYSTEM SFI SYSTEM ES 291 ES OK REPLACE ECM See page ES 518 ...
Page 556: ...ES 400 2GR FE ENGINE CONTROL SYSTEM SFI SYSTEM ES A REPLACE TCM ...
Page 630: ...ES 474 2GR FE ENGINE CONTROL SYSTEM SFI SYSTEM ES OK REPLACE ECM See page ES 518 ...
Page 658: ...2GR FE ENGINE CONTROL SYSTEM VVT SENSOR ES 493 ES 22 INSTALL ENGINE UNDER COVER LH ...
Page 897: ...2GR FE STARTING SMART KEY SYSTEM ST 35 ST OK REPLACE MAIN BODY ECU ...
Page 923: ...2GR FE STARTING SMART KEY SYSTEM ST 61 ST OK REPLACE MAIN BODY ECU ...
Page 935: ...2GR FE STARTING SMART KEY SYSTEM ST 73 ST OK REPLACE MAIN BODY ECU ...
Page 940: ...ST 78 2GR FE STARTING SMART KEY SYSTEM ST OK REPLACE MAIN BODY ECU ...
Page 958: ...ST 96 2GR FE STARTING SMART KEY SYSTEM ST OK END MAIN BODY ECU DEFECTIVE ...