Toyota FJ Cruiser (GSJ 10, 15 series). Instruction — part 86
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES–299
ES
FAIL-SAFE
When this DTC, as well as other DTCs relating to ETCS (Electronic Throttle Control System)
malfunctions, is 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.
WIRING DIAGRAM
Refer to DTC P2102 (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.
(c) Turn the tester ON.
(d) Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / DTC INFO / CURRENT CODES.
(e) Read DTCs.
Result
HINT:
If any DTCs other than P2119 are output, troubleshoot
those DTCs first.
B
A
(a) Connect an intelligent tester to the DLC3.
(b) Turn the ignition switch ON.
(c) Turn the tester ON.
(d) Clear DTCs (See page
).
(e) Allow the engine to idle for 15 seconds.
CAUTION:
Exercise extreme care and take precautions at steps (f)
and (g) below. Failure to do so may result in the vehicle
unexpectedly rolling away.
(f) Securely apply the parking brake and move the gear
selector lever to the D position.
1
CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2119)
Display (DTC Output)
Proceed To
P2119
A
P2119 and other DTCs
B
GO TO DTC CHART (See page
)
2
CHECK WHETHER DTC OUTPUT RECURS (DTC P2119)
ES–300
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
(g) While depressing the brake pedal securely, fully depress
the accelerator pedal for 5 seconds.
(h) Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / DTC INFO / CURRENT CODES.
(i) Read DTCs.
HINT:
The voltage output of the throttle position sensor can be
checked during step (g) using an intelligent tester. Variations
in the voltage output indicate that the throttle actuator is in
operation. To check the voltage output using an intelligent
tester, select the following menu items: DIAGNOSIS /
ENHANCED OBD II / DATA LIST / PRIMARY / THROTTLE
POS #1.
OK:
No DTC output.
NG
OK
REPLACE THROTTLE WITH MOTOR BODY
ASSEMBLY (See page
CHECK FOR INTERMITTENT PROBLEMS
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES–301
ES
HINT:
These DTCs relate to the Accelerator Pedal Position (APP) sensor.
DESCRIPTION
HINT:
This ETCS (Electronic Throttle Control System) does not use a throttle cable.
The Accelerator Pedal Position (APP) sensor is mounted on the accelerator pedal bracket and has 2
sensor circuits: VPA (main) and VPA2 (sub). 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 voltage, which is applied to terminals VPA and VPA2 of the ECM, varies
between 0 V and 5 V in proportion to the operating angle of the accelerator pedal (throttle valve). A signal
from VPA indicates the actual accelerator pedal opening angle (throttle valve opening angle) and is used
for engine control. A signal from VPA2 conveys the status of the VPA circuit and is used to check the APP
sensor itself.
The ECM monitors the actual accelerator pedal opening angle (throttle valve opening angle) through the
signals from VPA and VPA2, and controls the throttle actuator according to these signals.
DTC
P2120
Throttle / Pedal Position Sensor / Switch "D"
Circuit
DTC
P2122
Throttle / Pedal Position Sensor / Switch "D"
Circuit Low Input
DTC
P2123
Throttle / Pedal Position Sensor / Switch "D"
Circuit High Input
DTC
P2125
Throttle / Pedal Position Sensor / Switch "E"
Circuit
DTC
P2127
Throttle / Pedal Position Sensor / Switch "E"
Circuit Low Input
DTC
P2128
Throttle / Pedal Position Sensor / Switch "E"
Circuit High Input
DTC
P2138
Throttle / Pedal Position Sensor / Switch "D" /
"E" Voltage Correlation
ES–302
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
DTC No.
DTC Detection Conditions
Trouble Areas
P2120
VPA fluctuates rapidly beyond upper and lower malfunction thresholds for 0.5
seconds or more (1 trip detection logic)
•
Accelerator Pedal Position (APP) sensor
•
ECM
P2122
VPA 0.4 V or less for 0.5 seconds or more when accelerator pedal fully
released (1 trip detection logic)
•
APP sensor
•
Open in VCP1 circuit
•
Open or ground short in VPA circuit
•
ECM
P2123
VPA 4.8 V or more for 2.0 seconds or more (1 trip detection logic)
•
APP sensor
•
Open in EPA circuit
•
ECM
P2125
VPA2 fluctuates rapidly beyond upper and lower malfunction thresholds for
0.5 seconds or more (1 trip detection logic)
•
APP sensor
•
ECM
P2127
VPA2 1.2 V or less for 0.5 seconds or more when accelerator pedal fully
released (1 trip detection logic)
•
APP sensor
•
Open in VCP2 circuit
•
Open or ground short in VPA2 circuit
•
ECM
P2128
Conditions (a) and (b) continue for 2.0 seconds or more (1 trip detection
logic)
(a) VPA2 4.8 V or more
(b) VPA between 0.4 V and 3.45 V
•
APP sensor
•
Open in EPA2 circuit
•
ECM
P2138
Condition (a) or (b) continues for 2.0 seconds or more (1 trip detection logic)
(a) Difference between VPA and VPA2 0.02 V or less
(b) VPA 0.4 V or less and VPA2 1.2 V or less
•
Short between VPA and VPA2 circuits
•
APP sensor
•
ECM
Accelerator Pedal Position Sensor
Magnet
ECM
3.4 to 5.0
2.6 to 4.5
1.6
0.8
5
VPA
EPA
VCPA
VPA2
EPA2
VCP2
Usable Range
Accelerator Pedal Turning Angle (deg)
*1: Accelerator Pedal Fully Released
*2: Accelerator Pedal Fully Depressed
Accelerator Pedal Position Sensor Output Voltage (V)
*1
0
25
*2
Magnet
IC No.1
IC No.2
15.9
A115889E06
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