2001 TOYOTA SEQUOIA engine

A05652A18100
ECM
+BM
E47
W±G
Battery2H3 ETCS
2D1Engine Room J/B
B
IA413
W±G
4
F10
Fusible Link
Block
5
B DI±364
± DIAGNOSTICSENGINE
558 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

A21380
Engine Room J/B
ETCS
Fuse
B17411
+BM (+) E6
E4
E1 (±)
± DIAGNOSTICSENGINE
DI±365
559 Author: Date:
2005 SEQUOIA (RM1146U)
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.
1 Check ETCS fuse.
PREPARATION:
Remove the ETCS fuse from the engine room J/B.
CHECK:
Check the resistance of the ETCS fuse.
OK:
Below 1 W
NG Check for short in all harness and components
connected to ETCS fuse.
OK
2 Check voltage between terminal +BM and E1 of ECM connector.
CHECK:
Measure the voltage between the specified terminals of the E6
and E4 ECM connector.
OK:
Standard:
Tester ConnectionSpecified Condition
+BM (E4±7) ± E6 (E6±1)9 to 14 V
OK Check for intermittent problems
(See page DI±11).
NG

A21380
Engine Room J/B
ETCS
Fuse
B17417
E4
+BM
DI±366
± DIAGNOSTICSENGINE
560 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check for open or short in harness or connector between battery and ETCS fuse,
ETCS fuse and ECM.
PREPARATION:
(a) Remove the ETCS fuse from the engine room J/B.
(b) Disconnect the E4 ECM connector.
CHECK:
Measure the resistance of the wire harness side connector be-
tween the ETCS fuse and ECM.
OK:
Standard:
Tester ConnectionSpecified Condition
Engine Room J/B (ETCS fuse
terminal) ± +BM (E4±7)Below 1 W
Engine Room J/B (ETCS fuse
terminal) or +BM (E4±7) ±
Body ground
10 kW or higher
PREPARATION:
(a) Remove the ETCS fuse from the engine room J/B.
(b) Disconnect the battery positive terminal.
CHECK:
Measure the resistance of the wire harness side connector be-
tween the ETCS fuse and battery.
OK:
Standard:
Tester ConnectionSpecified Condition
Engine Room J/B (ETCS fuse
terminal) ± Battery positive terminalBelow 1 W
Engine Room J/B (ETCS fuse
terminal) or
Battery positive terminal ± Body ground
10 kW or higher
NG Repair or replace harness or connector.
OK
Check engine room J/B.

± DIAGNOSTICSENGINE
DI±367
561 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P2119 Throttle Actuator Control Throttle Body
Range/Performance
CIRCUIT DESCRIPTION
The Electric Throttle Control System (ETCS) is composed of a throttle motor that operates the throttle valve,
a throttle position sensor that detects the opening angle of the throttle valve, an accelerator pedal position
sensor that detects the accelerator pedal position, and the ECM that controls the ETCS system.
The ECM operates the throttle motor to position the throttle valve for proper response to driver inputs. The
throttle position sensor, mounted on the throttle body, detects the opening angle of the throttle valve and
provides this signal to the ECM so that the ECM can regulate the throttle motor.
DTC No.DTC Detection ConditionTrouble Area
P2119
Throttle opening angle continues to vary greatly from target
throttle opening angle
(1 trip detection logic)
Electric throttle control system

Throttle body
MONITOR DESCRIPTION
The ECM determines the ºactualº throttle angle based on the throttle position sensor signal. The ºactualº
throttle position is compared to the ºtargetº throttle position commanded by the ECM. If the difference of
these two values exceeds a specified limit, the ECM interprets this as a fault in the ETCS (Electronic Throttle
Control System). The ECM turns on the MIL and a DTC is set.
FAIL SAFE
If the ETCS (Electronic Throttle Control System) has a malfunction, the ECM cuts off current to the throttle
control motor. The throttle control valve returns to a predetermined opening angle (approximately 16°) by
the force of the return spring. The ECM then adjusts the engine output by controlling the fuel infection (inter-
mittent fuel±cut) and ignition timing in accordance with the accelerator pedal opening angle to enable the
vehicle to continue at a minimum speed.
If the accelerator pedal is depressed firmly and slowly, the vehicle can be driven slowly.
If a ºpassº condition is detected and then the ignition switch is turned OFF, the fail±safe operation will stop
and the system will return to normal condition.
MONITOR STRATEGY
Related DTCsP2119Electronic throttle control system failure
Rid / tMain sensorsThrottle actuator motorRequired sensors/componentsRelated sensorsThrottle position sensor
Frequency of operationContinuous
Duration1 sec.
MIL operationImmediate
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
The monitor will run whenever this DTC is
not presentSee page DI±18
The typical enabling condition is not avail-
able±
DICFC±02

DI±368
± DIAGNOSTICSENGINE
562 Author: Date:
2005 SEQUOIA (RM1146U)
TYPICAL MALFUNCTION THRESHOLDS
Detection CriteriaThreshold
Difference between ºtarget throttle positionº and ºactual
throttle positionº0.3 V or more
COMPONENT OPERATING RANGE
Standard Value
Commanded throttle position and current throttle position are nearly the same
WIRING DIAGRAM
Refer to DTC P2102 and P2103 on page DI±354.
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.
1 Are there any other codes (besides DTC P2119) being output?
PREPARATION:
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch ON and push the hand±held tester main switch ON.
(c) When using hand±held tester, enter the following menu: DIAGNOSIS / ENHANCED OBD II / DTC
INFO / CURRENT CODES.
CHECK:
Read the DTC using the hand±held tester.
RESULT:
Display (DTC Output)Proceed to
P2119A
ºP2119º and other DTCB
HINT:
If any other codes besides P2119 are output, perform the troubleshooting for those DTCs first.
B Go to relevant DTC chart (See page DI±58).
A

A21034
T14
Component Side:
M+M± Throttle Control Motor and Sensor
± DIAGNOSTICSENGINE
DI±369
563 Author: Date:
2005 SEQUOIA (RM1146U)
2 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 ConnectionSpecified Condition
M+ (T14±2) ± M± (T14±1)0.3 to100 W (20°C (68°F))
NG Replace throttle body (See page SF±42).
OK
3 Replace ECM and check DTC (Check if DTC outputs reoccur).
PREPARATION:
(a) Replace ECM.
(b) Clear the DTC (See page DI±43).
(c) Start and warm up the engine.
(d) Run the engine at idle for 15 seconds or more.
CHECK:
Read the DTC using the hand±held tester (See page DI±43).
OK:
No DTC output.
OK System is normal.
NG
Replace throttle body.

DI±370
± DIAGNOSTICSENGINE
564 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P2120 Throttle/Pedal Position Sensor/Switch ºDº
Circuit
DTC P2122 Throttle/Pedal Position Sensor/Switch ºDº
Circuit Low Input
DTC P2123 Throttle/Pedal Position Sensor/Switch ºDº
Circuit High Input
DTC P2125 Throttle/Pedal Position Sensor/Switch ºEº
Circuit
DTC P2127 Throttle/Pedal Position Sensor/Switch ºEº
Circuit Low Input
DTC P2128 Throttle/Pedal Position Sensor/Switch ºEº
Circuit High Input
DTC P2138 Throttle/Pedal Position Sensor/Switch
ºDº/ºEº Voltage Correlation
HINT:
This is the repair procedure for the ºaccelerator pedal position sensorº.
DID8G±01

A19694A19803
5
3.7 to 4.4
2.9 to 3.6
1.6
1.4
025 IC No. 1
IC No. 2
Accelerator Pedal
Position SensorECM
VPA
EPA
VCPA
VPA2
EPA2
VCP2Usable Range
Magnet
Magnet
Accelerator Pedal Position Sensor Output Voltage (V)
: Accelerator Pedal Fully Released
: Accelerator Pedal Fully DepressedAccelerator Pedal Turning Angle (deg)*
2*1
*1
*2
± DIAGNOSTICSENGINE
DI±371
565 Author: Date:
2005 SEQUOIA (RM1146U)
CIRCUIT DESCRIPTION
HINT:

This electrical throttle control system does not use a throttle cable.

This accelerator pedal position sensor is a non±contact type.
The accelerator pedal position sensor is mounted in the accelerator pedal to detect the angle of the accelera-
tor pedal. This sensor is electronically controlled and uses Hall±effect elements.
In the accelerator pedal position sensor, the voltage applied to terminals VPA and VPA2 of the ECM changes
between 0 V and 5 V in proportion to the angle of the accelerator pedal. The VPA is a signal to indicate the
actual accelerator pedal angle and is used for the engine control. VPA2 is used to detect malfunctions of
the sensor itself.
The ECM judges the current angle of the accelerator pedal from these signals input from terminals VPA and
VPA2, and the ECM controls the throttle motor based on these signals.