Toyota FJ Cruiser (GSJ 10, 15 series). Instruction — part 41
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
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DESCRIPTION
Refer to DTC P0115 (See page
MONITOR DESCRIPTION
ECT sensor cold start monitor
When a cold engine start is performed and then the engine is warmed up, if the ECT sensor value does
not change, it is determined that a malfunction has occurred. If this is detected in 2 consecutive driving
cycles, the MIL is illuminated and a DTC is set.
ECT sensor soak monitor
After a warmed up engine is started, if the ECT sensor value does not change when the engine is stopped
and then the next cold engine start is performed, it is determined that a malfunction has occurred. If this is
detected in 2 consecutive driving cycles, the MIL is illuminated and a DTC is set.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
ECT Sensor cold start monitor:
DTC
P0116
Engine Coolant Temperature Circuit Range /
Performance Problem
DTC No.
DTC Detection Conditions
Trouble Areas
P0116
When either of following conditions met (2 trip detection
logic):
•
When cold engine started and engine warmed up, Engine
Coolant Temperature (ECT) sensor value does not
change.
•
After warmed up engine started, if ECT sensor value
does not change when engine stopped and then next
cold engine start performed, it determined that
malfunction has occurred.
•
Thermostat
•
ECT sensor
Related DTCs
P0116: ECT sensor cold start monitor
P0116: ECT sensor soak monitor
Required Sensors/Components (Main)
ECT sensor
Required Sensors/Components (Related)
Intake Air Temperature (IAT) sensor and Mass Air Flow (MAF) meter
Frequency of Operation
Once per driving cycle
Duration
10 seconds
MIL Operation
2 driving cycles
Sequence of Operation
None
Monitor runs whenever following DTCs not present
P0100 to P0103: MAF meter
P0110 to P0113: IAT sensor
Battery voltage
10.5 V or more
Time after engine start
1 second or more
ECT at engine start
Less than 60
°C (140°F)
IAT sensor circuit
OK
Soak time
5 hours or more
Accumulated MAF
900 g or more
Engine
Running
Fuel cut
OFF
Difference between ECT at engine start and IAT
Less than 40
°C (72°F)
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1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
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ECT Sensor soak monitor:
TYPICAL MALFUNCTION THRESHOLDS
ECT Sensor cold start monitor:
ECT Sensor soak monitor:
COMPONENT OPERATING RANGE
INSPECTION PROCEDURE
HINT:
•
If any of DTCs P0115, P0117, P0118 or P0125 are set simultaneously with DTC P0116, the ECT
sensor may have an open or a short circuit. Troubleshoot those DTCs first.
•
Read freeze frame data using an intelligent tester. Freeze frame data record the engine condition when
malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle
was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and
other data, from the time the malfunction occurred.
(a) Connect an intelligent tester to the DLC3.
(b) Turn the ignition switch ON.
(c) Turn the tester ON.
(d) Select the following menu items: DIAGNOSIS /
ENHANCED II / DTC INFO / CURRENT CODES.
(e) Read the DTC.
Result
B
A
Monitor runs whenever following DTCs not present
P0100 to P0103: MAF meter
P0110 to P0113: IAT sensor
Battery voltage
10.5 V or more
Engine
Running
Soak time
5 hours or more
Either (a) or (b) condition met
-
(a) ECT
60
°C (140°F) or more
(b) Accumulated MAF
5,000 g or more
ECT sensor value change
Less than 5
°C (9°F)
Difference between current ECT sensor value and previous ECT
sensor value when engine stopped
Less than 5
°C (9°F)
ECT
ECT sensor value changes in accordance with actual ECT
1
CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0116)
Display (DTC Output)
Proceed To
P0116
A
P0116 and other DTCs
B
GO TO DTC CHART (See page
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
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(a) Remove the water inlet with thermostat (See page
(b) Check the valve opening temperature of the thermostat.
Standard:
80
°C to 84°C (176°F to 183°F)
HINT:
In addition to the above check, confirm that the valve is
completely closed when the temperature is below the
standard.
(c) Reinstall the water inlet with thermostat (See page
NG
OK
2
INSPECT WATER INLET WITH THERMOSTAT
REPLACE WATER INLET WITH
THERMOSTAT (See page
REPLACE ENGINE COOLANT TEMPERATURE SENSOR (See page
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1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
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HINT:
These DTCs relate to the Throttle Position (TP) sensor.
DESCRIPTION
This ETCS (Electronic Throttle Control System) does not use a throttle cable. The Throttle Position (TP)
sensor is mounted on the throttle body, and detects the opening angle of the throttle valve. This sensor is
a non-contact type, and uses Hall-effect elements, in order to yield accurate signals, even in extreme
driving conditions, such as at high speeds as well as very low speeds.
The TP sensor has two sensor circuits which each transmits a signal, VTA1 and VTA2. VTA1 is used to
detect the throttle valve angle and VTA2 is used to detect malfunctions in VTA1. The sensor signal
voltages vary between 0 V and 5 V in proportion to the throttle valve opening angle, and are transmitted to
the VTA terminals of the ECM.
As the valve closes, the sensor output voltage decreases and as the valve opens, the sensor output
voltage increases. The ECM calculates the throttle valve opening angle according to these signals and
controls the throttle actuator in response to driver inputs. These signals are also used in calculations such
as air-fuel ratio correction, power increase correction and fuel-cut control.
DTC
P0120
Throttle / Pedal Position Sensor / Switch "A"
Circuit
DTC
P0122
Throttle / Pedal Position Sensor / Switch "A"
Circuit Low Input
DTC
P0123
Throttle / Pedal Position Sensor / Switch "A"
Circuit High Input
DTC
P0220
Throttle / Pedal Position Sensor / Switch "B"
Circuit
DTC
P0222
Throttle / Pedal Position Sensor / Switch "B"
Circuit Low Input
DTC
P0223
Throttle / Pedal Position Sensor / Switch "B"
Circuit High Input
DTC
P2135
Throttle / Pedal Position Sensor / Switch "A" /
"B" Voltage Correlation
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