Toyota Sequoia (2005). Manual — part 141
–
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
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
.
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
).
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
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
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
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