Toyota FJ Cruiser (GSJ 10, 15 series). Instruction — part 88
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES–307
ES
(a) Disconnect the A2 APP sensor connector.
(b) Turn the ignition switch ON.
(c) Measure the voltage between the terminals of the E47
ECM connector.
Standard Voltage
(d) Reconnect the APP sensor connector.
NG
OK
Replace the accelerator pedal rod assembly (See page
).
NEXT
(a) Connect an intelligent tester to the DLC3.
(b) Turn the ignition switch ON and turn the tester ON.
(c) Clear DTCs (See page
).
(d) Start the engine.
(e) Allow the engine to idle for 15 seconds.
(f)
Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / DTC INFO / CURRENT CODES.
(g) Read DTCs.
Result
B
3
INSPECT ECM (VCPA AND VCP2 VOLTAGE)
E47
ECM Connector
Accelerator Pedal
Position Sensor
Connector
EPA2 (-)
EPA (-)
VCPA (+)
VCP2 (+)
A2
A116173E03
Tester Connections
Specified Conditions
VCPA (E47-26) - EPA (E47-20)
4.5 to 5.5 V
VCP2 (E47-27) - EPA2 (E47-21)
REPLACE ECM (See page
4
REPLACE ACCELERATOR PEDAL ROD ASSEMBLY
5
CHECK WHETHER DTC OUTPUT RECURS (ACCELERATOR PEDAL POSITION SENSOR
DTCS)
Display (DTC Output)
Proceed To
P2120, P2122, P2123, P2125, P2127, P2128 and/or P2138
A
No output
B
SYSTEM OK
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES–309
ES
HINT:
This DTC relates to the Accelerator Pedal Position (APP) sensor.
DESCRIPTION
Refer to DTC P2120 (See page
MONITOR DESCRIPTION
The accelerator pedal position sensor is mounted on the accelerator pedal bracket. The accelerator pedal
position sensor has 2 sensor elements and 2 signal outputs: VPA and VPA2. VPA is used to detect the
actual accelerator pedal angle (used for engine control) and VPA2 is used to detect malfunctions in VPA.
When the difference between the voltage outputs of VPA and VPA2 deviates from the standard, the ECM
determines that the accelerator pedal position sensor is a malfunctioning. The ECM turns on the MIL and
the DTC is set.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
FAIL-SAFE
The accelerator pedal position sensor has two (main and sub) sensor circuits. If a malfunction occurs in
either of the sensor circuits, the ECM detects the abnormal signal voltage difference between the two
sensor circuits and switches to limp mode. In limp mode, the functioning circuit is used to calculate the
accelerator pedal opening angle to allow the vehicle to continue driving. If both circuits malfunction, the
ECM regards the opening angle of the accelerator pedal as being fully closed. In this case, the throttle
valve remains closed as if the engine is idling.
If a pass condition is detected and then the ignition switch is turned OFF, the fail-safe operation stops and
the system returns to a normal condition.
DTC
P2121
Throttle / Pedal Position Sensor / Switch "D"
Circuit Range / Performance
DTC No.
DTC Detection Conditions
Trouble Areas
P2121
Difference between VPA and VPA2 less than 0.4 V, or more
than 1.2 V for 0.5 seconds (1 trip detection logic)
•
Accelerator pedal position sensor
•
ECM
Related DTCs
P2121: Accelerator pedal position (APP) sensor rationality
Required Sensors/Components (Main)
APP sensor
Required Sensors/Components (Related)
-
Frequency of Operation
Continuous
Duration
0.5 seconds
MIL Operation
Immediate
Sequence of Operation
None
Monitor runs whenever following DTCs not present
None
Either of following conditions 1 or 2 met:
-
1. Ignition switch
ON
2. Throttle actuator power
ON
Difference between VPA voltage (learned value) and VPA2 voltage (learned value)
Less than 0.4 V, or more than 1.2 V
ES–310
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
WIRING DIAGRAM
Refer to DTC P2120 (See page
).
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 values displayed on the tester.
Standard Voltage
OK
NG
NG
OK
Replace the accelerator pedal rod assembly (See page
).
NEXT
(a) Connect an intelligent tester to the DLC3.
(b) Turn the ignition switch ON and turn the tester ON.
(c) Clear DTCs (See page
(d) Start the engine.
(e) Allow the engine to idle for 15 seconds.
1
READ VALUE USING INTELLIGENT TESTER (ACCEL POS #1 AND ACCEL POS #2)
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 3
2
CHECK HARNESS AND CONNECTOR (ACCELERATOR PEDAL POSITION SENSOR -
ECM) (See page ES-306)
REPAIR OR REPLACE HARNESS OR
CONNECTOR
3
REPLACE ACCELERATOR PEDAL ROD ASSEMBLY
4
CHECK WHETHER DTC OUTPUT RECURS (DTC P2121)
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