2001 TOYOTA SEQUOIA battery

± DIAGNOSTICSENGINE
DI±355
549 Author: Date:
2005 SEQUOIA (RM1146U)
MONITOR STRATEGY
RltdDTC
P2102Throttle actuator control motor current
(Low current)
Related DTCs
P2103Throttle actuator control motor current
(High current)
Required sensors/componentsThrottle actuator motor
Frequency of operationContinuous
Duration2 sec.
MIL operationImmediate
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever these
DTCs are not presentSee page DI±18
P2102:
Throttle motorON
Duty±cycle ratio to open throttle actuator80%±
Throttle actuator power supply8 V±
Current motor current ± Motor current at
0.016 sec. before±0.2 A
P2103:
Throttle motorON
Either of the following conditions is met:Condition 1 or 2
1. Throttle actuator power supply8 V±
2. Throttle actuator powerON
Battery voltage8 V±
StarterOFF
TYPICAL MALFUNCTION THRESHOLDS
Detection CriteriaThreshold
P2102:
Throttle motor currentLess than 0.5 A (when motor drive duty 80% or more)
P2103:
Throttle motor currentMore than 10 A (0.1 sec.)
More than 7 A (0.6 sec.)
WIRING DIAGRAM
Refer to DTC P0120 on page DI±127.

A21430
From BatteryETCS Fuse
+BM
+M
±M
ME01ECM
Motor Control
Circuit Throttle Control Motor
2
1 DI±362
± DIAGNOSTICSENGINE
556 Author: Date:
2005 SEQUOIA (RM1146U)
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 ConditionTrouble Area
P2118Open 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

± 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

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
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±379
573 Author: Date:
2005 SEQUOIA (RM1146U)
5 Check whether DTC output recurs (DTC P2120, P2122, P2123, P2125, P2127,
P2128 or P2138)
PREPARATION:
(a) Connect the hand±held tester to the DLC3.
(b) Disconnect the battery terminals or remove the EFI No. 1 fuse and ETCS fuse (Clear DTCs).
(c) Start the engine.
(d) Drive the engine at idle for 15 seconds or more.
(e) On the hand±held tester, select the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC
INFO / PENDING CODES.
CHECK:
Read the DTC output.
RESULT:
Display (DTC Output)Proceed To
P2120, P2122, P2123,P2125, P2127, P2128 or P2138A
No outputB
B System is OK.
A
Replace ECM (See page SF±80).

± DIAGNOSTICSENGINE
DI±387
581 Author: Date:
2005 SEQUOIA (RM1146U)
MONITOR STRATEGY
P2195A/F sensor (Bank 1) signal stuck leanP2195A/F sensor (Bank 1) current (high side)
P2196A/F sensor (Bank 1) signal stuck rich
RltdDTC
P2196A/F sensor (Bank 1) current (low side)Related DTCs
P2197A/F sensor (Bank 2) signal stuck leanP2197A/F sensor (Bank 2) current (high side)
P2198A/F sensor (Bank 2) signal stuck richP2198A/F sensor (Bank 2) current (low side)
Required sensors/componentsA/F sensor
Frequency of operationOnce per driving cycle
Duration15 sec.: A/F sensor signal stuck lean/rich
3 sec.: A/F sensor current (high/low side)
MIL operation2 driving cycles
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever these
DTCs are not presentSee page DI±18
P2195, P2197 (A/F sensor signal stuck lean):
Duration while all of following conditions
met2 sec.±
Rear HO2S voltage0.15 V±
Time after engine start30 sec.±
A/F sensor statusActivated
Fuel system statusClosed±loop
EngineRunning
P2196, P2198 (A/F sensor signal stuck rich):
Duration while all of following conditions
met2 sec.±
Rear HO2S voltage±0.6 V
Time after engine start30 sec.±
A/F sensor statusActivated
Fuel system statusClosed±loop
EngineRunning
P2195, P2197 (A/F sensor current (High side)):
Battery voltage11 V±
ECT75°C (167°F)±
Atmospheric pressure/760 mmHg0.75±
A/F sensor statusActivated
Continuous time of fuel±cut3 to 10 sec.
P2196, P2198 (A/F sensor current (Low side)):
Battery voltage11 V±
ECT75°C (167°F)±

A23547
2
A1A± MREL
HA2A
A1A+ECM
22
30 B±W
E4
E7
E7 E7
BR W±B
2EFI Relay
A39 A/F Sensor
(Bank 2 Sensor 1)
J42
J/C Engine Room R/B No. 2
W 114
F10
FL
Block
Battery
ED(Shielded)8
EB 3
2HT
AF+ +B
B
E77
E04 2IA4
5
L±R G±R
2
G±B
2
B 1
B1
4
BRB±W
W±B 2F
A/F 1
1 12 Engine Room R/B and J/B
2D
2A2H
26
EFI No. 1 EFI No. 2
22
W±BA/F Relay
1 2
3
5A
AJ2
J/C
G±R
15
IA51
IG4
(Shielded)
G
R
ECE
ECCC
J42
J/C J5
J/CJ2
J/C B
B 5Engine
Room
R/B No. 2R±W
R±W
R±W
R±W
A38 A/F Sensor
(Bank 1 Sensor 1)
+B AF±
HT
AF+
AF±1
3 2
4
1
3 2
4 R±WL31
E7 23
E7 E7
A2A+
A2A±
HA1A B
R/B
± DIAGNOSTICSENGINE
DI±389
583 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM