2001 TOYOTA SEQUOIA check engine

± DIAGNOSTICSENGINE
DI±353
547 Author: Date:
2005 SEQUOIA (RM1146U)
9 Replace air injection driver.
NEXT
10 Check whether DTC output recurs.
PREPARATION:
(a) Connect a hand±held tester to the DLC3.
(b) Turn the ignition switch to ON and turn the tester ON.
(c) Clear the DTCs (see page DI±43).
(d) Start the engine.
CHECK:
(a) Perform SYSTEM CHECK to operate the air injection system.
Select the following menu items: DIAGNOSIS/ENHANCED OBD II/SYSTEM CHECK/AIR INJ
CHECK/AUTOMATIC OPERATION
(b) After operating the secondary air injection system, confirm the pending codes of the secondary air in-
jection system by selecting the following menu items: DIAGNOSIS/ENHANCED OBD II/DTC INFO/
PENDING CODES.
OK:
DTC P1613 for the secondary air injection system is not output.
NG Go to DTC chart (See page DI±58).
OK
END

A21034
T14
Component Side:
M+M± Throttle Control Motor and Sensor
DI±356
± DIAGNOSTICSENGINE
550 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 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±39).
OK

A21022
T14
M+ M±
Wire Harness Side:
Throttle Control Motor and Sensor
B17412M+
M±
E8ECM Connector
± DIAGNOSTICSENGINE
DI±357
551 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check for open and short in harness and connector between throttle control mo-
tor and ECM.
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 ConnectionSpecified Condition
M+ (T14±2) ± M+ (E8±3)Below 1 W
M± (T14±1) ± M± (E8±2)Below 1 W
M+ (T14±2) or M+ (E8±3) ±
Body ground10 kW or higher
M± (T14±1) or M± (E8±2) ±
Body ground10 kW or higher
NG Repair or replace harness or connector.
OK
3 Visually check throttle valve.
CHECK:
Check the area between the throttle valve and the housing for foreign objects.
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 object and clean throttle body.
OK
Replace ECM (See page SF±80).

DI±360
± DIAGNOSTICSENGINE
554 Author: Date:
2005 SEQUOIA (RM1146U)
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 P2112A
P2111 and/or P2112 and other DTCsB
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
B17412M+
M±
E8ECM Connector
± DIAGNOSTICSENGINE
DI±361
555 Author: Date:
2005 SEQUOIA (RM1146U)
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 ConnectionSpecified Condition
M+ (T14±2) ± M± (T14±1)0.3 to100 W (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 ConnectionSpecified Condition
M+ (T14±2) ± M+ (E8±3)Below 1 W
M± (T14±1) ± M± (E8±2)Below 1 W
M+ (T14±2) or M+ (E8±3) ±
Body ground10 kW or higher
M± (T14±1) or M± (E8±2) ±
Body ground10 kW or higher
NG Repair or replace harness or connector.
OK
Check for intermittent problems
(See page DI±11).

± DIAGNOSTICSENGINE
DI±363
557 Author: Date:
2005 SEQUOIA (RM1146U)
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 DTCsP2118Throttle actuator motor power supply line range
check (Low voltage)
Required sensors/componentsThrottle actuator motor
Frequency of operationContinuous
Duration0.8 sec.
MIL operationImmediate
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever this DTC is
not presentSee page DI±18
Actuator powerON
Battery voltage8 V±
TYPICAL MALFUNCTION THRESHOLDS
Detection CriteriaThreshold
Throttle actuator motor power supply voltageLess than 4 V
COMPONENT OPERATING RANGE
ParameterStandard Value
Throttle actuator motor power supply voltage9 to 14 V

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.