Toyota FJ Cruiser (GSJ 10, 15 series). Instruction — part 84

1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM

ES–291

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DESCRIPTION

The throttle actuator is operated by the ECM, and opens and closes the throttle valve using gears. The
opening angle of the throttle valve is detected by the Throttle Position (TP) sensor, which is mounted on
the throttle body. The TP sensor provides feedback to the ECM in order that it can control the throttle
actuator, and therefore the throttle valve, appropriately in response to driver inputs.
HINT:
This ETCS (Electronic Throttle Control System) does not use a throttle cable.

MONITOR DESCRIPTION

The ECM determines that there is a malfunction in the ETCS when the throttle valve remains at a fixed
angle despite a high drive current from the ECM. The ECM illuminates the MIL and sets a DTC.
If the malfunction is not repaired successfully, a DTC is set when the accelerator pedal is fully depressed
and released quickly (to fully open and close the throttle valve) after the engine is next started.

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

ALL:

P2111 (Throttle actuator stuck open):

P2112 (Throttle actuator stuck closed):

DTC

P2111

Throttle Actuator Control System - Stuck Open

DTC

P2112

Throttle Actuator Control System - Stuck
Closed

DTC No.

DTC Detection Conditions

Trouble Areas

P2111

ECM signals throttle actuator to close, but stuck (1 trip
detection logic)

•

Throttle actuator

•

Throttle body assembly

•

Throttle valve

P2112

ECM signals throttle actuator to open, but stuck (1 trip
detection logic)

Related DTCs

P2111: Throttle actuator stuck open
P2112: Throttle actuator stuck closed

Required Sensors/Components (Main)

Throttle actuator

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

All of following conditions met

-

System guard

*

ON

Throttle motor current

2 A or more

Throttle motor close duty

80 % or more

All of following conditions met

-

System guard

*

ON

Throttle motor current

2 A or more

Throttle motor open duty

80 % or more

*

System guard set when following conditions met

-

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1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM

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TYPICAL MALFUNCTION THRESHOLDS

P2111 (Throttle actuator stuck open):

P2112 (Throttle actuator stuck closed):

FAIL-SAFE

When either of these DTCs, 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

ES-283

).

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 P2111 or P2112 are output,
troubleshoot those DTCs first.

Throttle motor

ON

Motor duty calculation

Executing

TPS fail determination

Fail determined

Motor current-cut operation

Not executing

Actuator power supply voltage

4 V or more

Motor fail determination

Fail determined

TP sensor voltage change for 0.016 seconds

Less than 0.1 V for 0.5 seconds or more

TP sensor voltage change for 0.016 seconds

Less than 0.1 V for 0.5 seconds or more

1

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2111 OR P2112)

Display (DTC Output)

Proceed To

P2111 or P2112

A

P2111 or P2112 and other DTCs

B

1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM

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B

A

(a) Check for contamination between the throttle valve and

the housing. If necessary, clean the throttle body. And
check that the throttle valve moves smoothly.
OK:

Throttle valve is not contaminated with foreign
objects and moves smoothly.

NG

OK

(a) Connect an intelligent tester to the DLC3.
(b) Turn the ignition switch ON.
(c) Turn the tester ON.
(d) Clear DTCs (See page

ES-38

).

(e) Start the engine, and fully depress and release the

accelerator pedal quickly (to fully open and close the
throttle valve).

(f)

Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / DTC INFO / CURRENT CODES.

(g) Read DTCs.

Result

B

A

GO TO DTC CHART (See page

ES-57

)

2

INSPECT THROTTLE WITH MOTOR BODY ASSEMBLY (VISUALLY CHECK THROTTLE
VALVE)

REPLACE THROTTLE WITH MOTOR BODY
ASSEMBLY (See page

ES-428

)

3

CHECK WHETHER DTC OUTPUT RECURS (DTC P2111 OR P2112)

Display (DTC Output)

Proceed To

No DTC

A

P2111 or P2112

B

REPLACE THROTTLE WITH MOTOR BODY
ASSEMBLY (See page

ES-428

)

CHECK FOR INTERMITTENT PROBLEMS

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1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM

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DESCRIPTION

The ETCS (Electronic Throttle Control System) has a dedicated power supply circuit. The voltage (+BM)
is monitored and when it is low (less than 4 V), the ECM determines that there is a malfunction in the
ETCS and cuts off the current to the throttle actuator.
When the voltage becomes unstable, the ETCS itself becomes unstable. For this reason, when the
voltage is low, the current to the throttle actuator is cut. If repairs are made and the system returns to
normal, turn the ignition switch OFF. The ECM then allows the current to flow to the throttle actuator so
that it can be restarted.
HINT:
The ETCS does not use a throttle cable.

MONITOR DESCRIPTION

The ECM monitors the battery supply voltage applied to the throttle actuator.
When the power supply voltage (+BM) drops to below 4 V for 0.8 seconds or more, the ECM interprets
this as an open in the power supply circuit (+BM). The ECM illuminates the MIL and sets the DTC.
If the malfunction is not repaired successfully, the DTC is set 5 seconds after the engine is next started.

MONITOR STRATEGY

DTC

P2118

Throttle Actuator Control Motor Current Range
/ Performance

DTC No.

DTC Detection Conditions

Trouble Areas

P2118

Open in ETCS power source (+BM) circuit (1 trip detection logic)

•

Open in ETCS power source circuit

•

ETCS fuse

•

ECM

Related DTCs

P2118: Throttle actuator power supply

Required Sensors/Components (Main)

Throttle actuator, throttle valve, ETCS fuse

Required Sensors/Components (Related)

None

Frequency of Operation

Continuous

Duration

0.8 seconds

From
Battery

ETCS

+BM

ECM

+M

-M

ME01

Throttle Actuator

Throttle Actuator
Control Circuit

A115751E01