Toyota FJ Cruiser (GSJ 10, 15 series). Instruction — part 87
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
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HINT:
When any of these DTCs are set, check the APP sensor voltage by selecting the following menu items on
an intelligent tester: DIAGNOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / ACCEL POS #1 and
ACCEL POS #2.
HINT:
Accelerator pedal positions are expressed as voltages.
MONITOR DESCRIPTION
When either of the output voltages of VPA or VPA2 deviates from the standard range, or the difference
between the output voltages of the 2 sensor circuits is less than the threshold, the ECM determines that
there is a malfunction in the APP sensor. The ECM then illuminates the MIL and sets a DTC.
Example:
When the output voltage of VPA drops to below 0.4 V for more than 0.5 seconds when the accelerator
pedal is fully depressed, DTC P2122 is set.
If the malfunction is not repaired successfully, a DTC is set 2 seconds after the engine is next started.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
P2120:
Trouble Areas
ACCEL POS #1
When Accelerator
Pedal Released
ACCEL POS #2
When Accelerator
Pedal Released
ACCEL POS #1
When Accelerator
Pedal Depressed
ACCEL POS #2
When Accelerator
Pedal Depressed
VCP circuit open
0 to 0.2 V
0 to 0.2 V
0 to 0.2 V
0 to 0.2 V
Open or ground short in VPA circuit
0 to 0.2 V
1.2 to 2.0 V
0 to 0.2 V
3.4 to 5.0 V
Open or ground short in VPA2 circuit
0.5 to 1.1 V
0 to 0.2 V
2.6 to 4.5 V
0 to 0.2 V
EPA circuit open
4.5 to 5.0 V
4.5 to 5.0 V
4.5 to 5.0 V
4.5 to 5.0 V
Normal condition
0.5 to 1.1 V
1.2 to 2.0 V
2.6 to 4.5 V
3.4 to 5.0 V
Related DTCs
P2120: Accelerator Pedal Position (APP) sensor 1 range check (fluctuating)
P2122: APP sensor 1 range check (low voltage)
P2123: APP sensor 1 range check (high voltage)
P2125: APP sensor 2 range check (fluctuating)
P2127: APP sensor 2 range check (low voltage)
P2128: APP sensor 2 range check (high voltage)
P2138: APP sensor range check (correlation)
Required Sensors/Components (Main)
APP sensor
Required Sensors/Components (Related)
-
Frequency of Operation
Continuous
Duration
0.5 seconds: P2120, P2122, P2125 and P2127
2.0 seconds: P2123, P2128 and P2138
MIL Operation
Immediate
Sequence of Operation
None
Monitor runs whenever following DTCs not present
None
Ignition switch
ON
Electronic throttle actuator power
ON
Either of the following conditions is met:
Condition 1 or 2
1. VPA1 voltage when VPA2 voltage is 0.04 V or more
0.4 V or less
2. VPA1 voltage
4.8 V or more
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1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
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P2122:
P2123:
P2125:
P2127:
P2128:
P2138:
COMPONENT OPERATING RANGE
FAIL-SAFE
When any of DTCs P2120, P2121, P2122, P2123, P2125, P2127, P2128 and P2138 are set, the ECM
enters fail-safe mode. If either of the 2 sensor circuits malfunctions, the ECM uses the remaining circuit to
calculate the accelerator pedal position to allow the vehicle to continue driving. If both of the circuits
malfunction, the ECM regards the accelerator pedal as being released. As a result, the throttle valve is
closed and the engine idles.
Fail-safe mode continues until a pass condition is detected, and the ignition switch is turned OFF.
VPA1 voltage when VPA2 voltage is 0.04 V or more
0.4 V or less
VPA1 voltage
4.8 V or more
Either of the following conditions is met:
Condition 1 or 2
1. VPA2 voltage when VPA1 is 0.04 V or more
1.2 V or less
2. VPA2 voltage when VPA1 is 0.4 to 3.45 V
4.8 V or more
VPA2 voltage when VPA1 0.04 V or more
1.2 V or less
VPA2 voltage when VPA1 0.4 to 3.45 V
4.8 V or more
Either of following conditions A or B met:
-
Condition A
-
Difference between VPA1 and VPA 2 voltages
0.02 V or less
Condition B
-
VPA1 voltage
0.4 V or less
VPA2 voltage
1.2 V or less
VPA1 voltage
0.5 V to 4.5 V
VPA2 voltage
1.2 V to 5.0 V
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES–305
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WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
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 / ACCEL POS
#1 and ACCEL POS #2.
(d) Read the value displayed on the tester.
Standard Voltage
OK
NG
1
READ VALUE USING INTELLIGENT TESTER (ACCEL POS #1 AND ACCEL POS #2)
A2
Accelerator Pedal Position Sensor
VPA
EPA
VCPA
VPA2
EPA2
VCP2
VPA
EPA
VCPA
VPA2
EPA2
VCP2
ECM
1
2
3
4
5
6
18
E47
20
E47
26
E47
19
E47
21
E47
27
E47
A133490E01
Depressed
Released
FI07052E06
Accelerator Pedal
Operations
ACCEL POS #1
ACCEL POS #2
Released
0.5 to 1.1 V
1.2 to 2.0 V
Depressed
2.6 to 4.5 V
3.4 to 5.0 V
Go to step 5
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1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
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(a) Disconnect the A2 Accelerator Pedal Position (APP)
sensor connector.
(b) Disconnect the E47 ECM connector.
(c) Check the resistance.
Standard Resistance (Check for open)
Standard Resistance (Check for short)
(d) Reconnect the APP sensor connector.
(e) Reconnect the ECM connector.
NG
OK
2
CHECK HARNESS AND CONNECTOR (ACCELERATOR PEDAL POSITION SENSOR -
ECM)
E47
Wire Harness Side:
ECM Connector
EPA
VPA
VPA2
EPA2
VCP2
VCPA
EPA
VPA
VPA2
EPA2
VCP2
VCPA
Accelerator Pedal Position
Sensor Connector
A2
A116156E02
Tester Connections
Specified Conditions
VPA (A2-6) - VPA (E47-18)
Below 1
Ω
EPA (A2-5) - EPA (E47-20)
VCPA (A2-4) - VCPA (E47-26)
VPA2 (A2-3) - VPA2 (E47-19)
EPA2 (A2-2) - EPA2 (E47-21)
VCP2 (A2-1) - VCP2 (E47-27)
Tester Connections
Specified Conditions
VPA (A2-6) or VPA (E47-18) - Body ground
10 k
Ω or higher
EPA (A2-5) or EPA (E47-20) - Body ground
VCPA (A2-4) or VCPA (E47-26) - Body ground
VPA2 (A2-3) or VPA2 (E47-19) - Body ground
EPA2 (A2-2) or EPA2 (E47-21) - Body ground
VCP2 (A2-1) or VCP2 (E47-27) - Body ground
REPAIR OR REPLACE HARNESS OR
CONNECTOR
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