Toyota FJ Cruiser (GSJ 10, 15 series). Instruction — part 42
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES–123
ES
DTC No.
DTC Detection Conditions
Trouble Areas
P0120
Output voltage of VTA1 quickly fluctuates beyond lower and
upper malfunction thresholds for 2 seconds when accelerator
pedal depressed (1 trip detection logic)
•
Throttle Position (TP) sensor (built into throttle body)
•
ECM
P0122
Output voltage of VTA1 0.2 V or less for 2 seconds when
accelerator pedal depressed (1 trip detection logic)
•
TP sensor (built into throttle body)
•
Short in VTA1 circuit
•
Open in VC circuit
•
ECM
P0123
Output voltage of VTA1 4.535 V or more for 2 seconds when
accelerator pedal depressed (1 trip detection logic)
•
TP sensor (built into throttle body)
•
Open in VTA1 circuit
•
Open in E2 circuit
•
Short between VC and VTA1 circuits
•
ECM
P0220
Output voltage of VTA2 quickly fluctuates beyond lower and
upper malfunction thresholds for 2 seconds when accelerator
pedal depressed (1 trip detection logic)
•
TP sensor (built into throttle body)
•
ECM
4.65
VTA2
VTA1
2.55
2.25
0.93
0.69
5.0
Fail Safe Angle
Usable Range
Throttle Valve Opening Angle (degrees)
Sensor Output Voltage (V)
84°
6°
0°
ECM
VC
E2
VTA1
VTA2
Magnet
Magnet
IC No. 1
IC No. 2
Throttle Position Sensor
Note:
The throttle valve opening angle detected by the sensor terminal
VTA1 is expressed as a percentage.
Between 10 % and 22 %: Throttle valve fully closed
Between 66 % and 98 %: Throttle valve fully open
Approximately 19 %: Fail-safe angle (6°)
A122559E02
ES–124
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
HINT:
•
When any of these DTCs are set, check the throttle valve opening angle by selecting the following
menu items on an intelligent tester: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ETCS /
THROTTLE POS #1 AND THROTTLE POS #2.
•
THROTTLE POS #1 denotes the VTA1 signal, and THROTTLE POS #2 denotes the VTA2 signal .
Reference (Normal Condition)
MONITOR DESCRIPTION
The ECM uses the Throttle Position (TP) sensor to monitor the throttle valve opening angle. There are
several checks that the ECM performs to confirm the proper operation of the TP sensor.
•
A specific voltage difference is expected between the sensor terminals, VTA1 and VTA2, for each
throttle valve opening angle. If the difference between VTA1 and VTA2 is incorrect, the ECM interprets
this as a malfunction in the sensor, and sets a DTC.
•
VTA1 and VTA2 each have a specific voltage range. If VTA1 or VTA2 is outside the normal operating
range, the ECM interprets this as a malfunction in the sensor, and sets a DTC.
•
VTA1 and VTA2 should never be close to the same voltage level. If VTA1 is within 0.02 V of VTA2, the
ECM determines that there is a short circuit in the sensor, and sets a DTC.
If the malfunction is not repaired successfully, a DTC is set 10 seconds after the engine is next started.
MONITOR STRATEGY
P0222
Output voltage of VTA2 1.75 V or less for 2 seconds when
accelerator pedal depressed (1 trip detection logic)
•
TP sensor (built into throttle body)
•
Short in VTA2 circuit
•
Open in VC circuit
•
ECM
P0223
Output voltage of VTA2 4.8 V or more, and VTA1 between 0.2
V and 2.02 V, for 2 seconds when accelerator pedal depressed
(1 trip detection logic)
•
TP sensor (built into throttle body)
•
Open in VTA2 circuit
•
Open in E2 circuit
•
Short between VC and VTA2 circuits
•
ECM
P2135
Either condition (a) or (b) met (1 trip detection logic)
(a) Difference between output voltages of VTA1 and VTA2 0.02
V or less for 0.5 seconds or more
(b) Output voltage of VTA1 0.2 V or less, and VTA2 1.75 V or
less, for 0.4 seconds or more
•
Short between VTA1 and VTA2 circuits
•
TP sensor (built into throttle body)
•
ECM
Tester Display
Accelerator Pedal Fully Released
Accelerator Pedal Fully Depressed
THROTTLE POS #1
0.5 to 1.1 V
3.3 to 4.9 V
THROTTLE POS #2
2.1 to 3.1 V
4.6 to 5.0 V
Related DTCs
P0120: Throttle position sensor 1 range check (Fluctuating)
P0122: Throttle position sensor 1 range check (Low voltage)
P0123: Throttle position sensor 1 range check (High voltage)
P0220: Throttle position sensor 2 range check (Fluctuating)
P0222: Throttle position sensor 2 range check (Low voltage)
P0223: Throttle position sensor 2 range check (High voltage)
P2135: Throttle position sensor range check (Correlation)
Required Sensors/Components (Main)
Throttle position sensor
Required Sensors/Components (Related)
-
Frequency of Operation
Continuous
Duration
2 seconds: P0120, P0122, P0123, P0220, P0222 and P0223
(Accelerator pedal ON)
10 seconds: P0120, P0122, P0123, P0220, P0222 and P0223
(Accelerator pedal OFF)
Within 0.5 seconds: P2135
MIL Operation
Immediate
Sequence of Operation
None
DTC No.
DTC Detection Conditions
Trouble Areas
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES–125
ES
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
P0120:
P0122:
P0123:
P0220:
P0222:
P0223:
P2135:
COMPONENT OPERATING RANGE
FAIL-SAFE
When any of these DTCs, as well as other DTCs relating to ETCS (Electronic Throttle Control System)
malfunctions, are set, the ECM enters fail-safe mode. During fail-safe mode, the ECM cuts the current to
the throttle actuator off, and the throttle valve is returned to a 6
° throttle angle by the return spring. The
ECM then adjusts the engine output by controlling the fuel injection (intermittent fuel-cut) and ignition
timing, in accordance with the accelerator pedal opening angle, to allow the vehicle to continue at a
minimal speed.
If the accelerator pedal is depressed firmly and gently, the vehicle can be driven slowly.
Fail-safe mode continues until a pass condition is detected, and the ignition switch is then turned OFF.
Monitor runs whenever following DTCs not present
None
VTA1 voltage
0.2 V or less, or 4.535 V or more
VTA1 voltage
0.2 V or less
VTA1 voltage
4.535 V or more
VTA2 voltage
1.75 V or less, or 4.8 V or more
VTA2 voltage
1.75 V or less
VTA2 voltage when VTA1 0.2 V or more, and 2.02 V or less
4.8 V or more
Either of following conditions A or B met:
-
Condition A
-
Difference between VTA1 and VTA2 voltages
0.02 V or less
Condition B
-
VTA1 voltage
0.2 V or less
VTA2 voltage
1.75 V or less
VTA1 voltage
0.69 to 4.05 V
VTA2 voltage
2.25 to 4.8 V
ES–126
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
•
If other DTCs relating to different systems that have terminal E2 as the ground terminal are output
simultaneously, terminal E2 may have an open circuit.
•
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 and turn the tester ON.
(c) Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / DATA LIST / ETCS / THROTTLE
POS #1 and THROTTLE POS #2.
(d) Check the values displayed on the tester.
Result
1
READ VALUE USING INTELLIGENT TESTER (THROTTLE POS #1 AND THROTTLE POS
#2)
3
4
Throttle Position Sensor (Built into Throttle Body)
ECM
VTA
VC
VTA2
E2
VTA1
VC
VTA2
E2
5 V
5
6
B14
B1
B1
B1
B1
20
23
19
28
A133411E01
TP#1 (VTA1)
When Accelerator
Pedal Released
TP#2 (VTA2)
When Accelerator
Pedal Released
TP#1 (VTA1)
When Accelerator
Pedal Depressed
TP#2 (VTA2)
When Accelerator
Pedal Depressed
Trouble Areas
Proceed To
0 to 0.2 V
0 to 0.2 V
0 to 0.2 V
0 to 0.2 V
VC circuit open
A
4.5 to 5.0 V
4.5 to 5.0 V
4.5 to 5.0 V
4.5 to 5.0 V
E2 circuit open
A
0 to 0.2 V, or 4.5 to
5.0 V
2.1 to 3.1 V
(Fail-safe)
0 to 0.2 V, or 4.5 to 5.0 V
2.1 to 3.1 V
(Fail-safe)
VTA1 circuit open
or ground short
A
Approximately 0.93
V
(Fail-safe)
0 to 0.2 V,
or 4.5 to 5.0 V
Approximately 2.55 V
(Fail-safe)
0 to 0.2 V,
or 4.5 to 5.0 V
VTA2 circuit open
or ground short
A
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