Toyota Sequoia (2005). Manual - part 141

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DIAGNOSTICS

ENGINE

DI–359

553

MONITOR STRATEGY

R l t d DTC

P2111

Throttle motor actuator lock (Open)

Related DTCs

P2112

Throttle motor actuator lock (Closed)

R

i d

/

t

Main sensors/components

Throttle actuator motor

Required sensors/components

Related sensors/components

Throttle position sensor

Frequency of operation

Continuous

Duration

0.5 sec.

MIL operation

Immediate

Sequence of operation

None

TYPICAL ENABLING CONDITIONS

It

Specification

Item

Minimum

Maximum

The monitor will run whenever these

DTCs are not present

See page 

DI–18

P2111:

Throttle motor current

2 A

–

Throttle motor duty to close side

80%

–

P2112:

Throttle motor current

2 A

–

Throttle motor duty to open side

80%

–

TYPICAL MALFUNCTION THRESHOLDS

Detection Criteria

Threshold

|Current throttle position sensor voltage at this time – throttle
position sensor voltage 0.016 sec. earlier|

Less than 0.1 V when throttle motor open (or close) duty 80% or more

WIRING DIAGRAM

Refer to DTC P0120 on page 

DI–127

.

INSPECTION PROCEDURE

HINT:
Read freeze frame data using 

the hand−held tester.

 Freeze frame data records the engine conditions when

a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was
running or stopped, if the engine was warmed up or not, if the air–fuel ratio was lean or rich, as well as other
data from the time when a malfunction occurred.

DI–360

–

DIAGNOSTICS

ENGINE

554

1

Check any other DTC output (in addition to DTC P2111 or P2112).

PREPARATION:
(a)

Connect a hand–held tester to the DLC3.

(b)

Turn the ignition switch to ON and turn the tester ON.

(c)

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

CHECK:
(a)

Read DTCs.
Result:

Display (DTC Output)

Proceed To

P2111 and/or P2112

A

P2111 and/or P2112 and other DTCs

B

HINT:
If any DTCs other than P2111 and/or P2112 are output, troubleshoot those DTCs first.

B

Go to DTC chart (See page 

DI–58

).

A

2

Visually check throttle valve.

PREPARATION:
Remove the intake air connector.
CHECK:
Check whether or not a foreign body is caught between the throttle valve and housing. Also, check if the valve
can open and close smoothly.
OK: The throttle valve is not contaminated by foreign objects and can move smoothly.

NG

Remove foreign body and clean throttle body.

OK

A21034

T14

Component Side:

M+

M–

Throttle Control Motor and Sensor

A21022

T14

M+

M–

Wire Harness Side:
Throttle Control Motor and Sensor

B17412

M+

M–

E8

ECM Connector

–

DIAGNOSTICS

ENGINE

DI–361

555

3

Check throttle control motor.

PREPARATION:
Disconnect the throttle control motor and sensor connector.
CHECK:
Measure the resistance between terminals of the throttle con-
trol motor.
OK:

Standard:

Tester Connection

Specified Condition

M+ (T14–2) – M– (T14–1)

0.3 to100 

Ω

 (20

°

C (68

°

F))

NG

Replace throttle body (See page 

SF–39

).

OK

4

Check for open and short in harness and connector between ECM and throttle
control motor.

PREPARATION:
(a)

Disconnect the T14 throttle control motor and sensor con-
nector.

(b)

Disconnect the E8 ECM connector.

CHECK:
Measure the resistance between the wire harness side connec-
tors.
OK:

Standard:

Tester Connection

Specified Condition

M+ (T14–2) – M+ (E8–3)

Below 1 

Ω

M– (T14–1) – M– (E8–2)

Below 1 

Ω

M+ (T14–2) or M+ (E8–3) – 

Body ground

10 k

Ω

 or higher

M– (T14–1) or M– (E8–2) – 

Body ground

10 k

Ω

 or higher

NG

Repair or replace harness or connector.

OK

Check for intermittent problems 
(See page 

DI–11

).

A21430

From Battery

ETCS Fuse

+BM

+M

–M

ME01

ECM

Motor Control
Circuit

Throttle Control Motor

2

1

DI–362

–

DIAGNOSTICS

ENGINE

556

DTC

P2118

Throttle Actuator Control Motor Current
Range/Performance

CIRCUIT DESCRIPTION

The Electronic Throttle Control System (ETCS) has a dedicated power supply circuit. The voltage (+BM) is
monitored and when the voltage is low (less than 4V), the ECM concludes that the ETCS has a fault and
current to the throttle control motor is cut.
When the voltage becomes unstable, the ETCS itself becomes unstable. For this reason, when the voltage
is low, the current to the motor is cut. If repairs are made and the system has returned to normal, turn the
ignition switch OFF. The ECM then allows current to flow to the motor and the motor can be restarted.
HINT:
This Electrical Throttle Control System (ETCS) does not use a throttle cable.

DTC No.

DTC Detection Condition

Trouble Area

P2118

Open in ETCS power source circuit (+BM)

Open in ETCS power source circuit

ETCS fuse

ECM

MONITOR DESCRIPTION

The ECM monitors the battery supply voltage applied to the electronic throttle motor +BM. When the power
supply voltage drops below the threshold, the ECM concludes that the power supply has an open circuit.
The MIL is turned on and a DTC is set.

DICFB–02