2001 TOYOTA SEQUOIA check engine

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.

± DIAGNOSTICSENGINE
DI±373
567 Author: Date:
2005 SEQUOIA (RM1146U)
MONITOR STRATEGY
P2120Accelerator position sensor 1 (VPA) range check
(Fluttering)
P2122Accelerator position sensor 1 (VPA) range check
(Low voltage)
P2123Accelerator position sensor 1 (VPA) range check
(High voltage)
Related DTCsP2125Accelerator position sensor 2 (VPA2) range
check (Fluttering)
P2127Accelerator position sensor 2 (VPA2) range
check (Low voltage)
P2128Accelerator position sensor 2 (VPA2) range
check (High voltage)
P2138Accelerator position sensor correlation range
check
Required sensors/componentsAccelerator position sensor
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
Ignition switchON
Throttle control motor powerON

FI7052DepressedReleased
DI±376
± DIAGNOSTICSENGINE
570 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 Connect hand±held tester, and read the voltage for accelerator pedal position
sensor data.
PREPARATION:
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch ON and push the hand±held tes-
ter main switch ON.
(c) Enter the following menu: DIAGNOSIS / ENHANCED
OBD II / DATA LIST / ETCS / ACCEL POS #1 and ACCEL
POS #2.
CHECK:
Read the voltage for the accelerator pedal position sensor data.
OK:
Standard:
Accelerator pedalACCEL POS #1ACCEL POS #2
Released0.5 to 1.1 V1.2 to 2.0 V
Depressed2.6 to 4.5 V3.4 to 5.3 V
OK Go to step 5.
NG

A21022
Wire Harness Side:
A37
Accelerator Pedal Position Sensor
VCP2
EPA2
VPA2
VCPAEPAVPA
B17417
E4VPA2
VCPAVPA
EPA2
EPAVCP2
± DIAGNOSTICSENGINE
DI±377
571 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check for open and short in harness and connector in VCPA, VCP2, VPA, VPA2
EPA and EPA2 circuit between ECM and accelerator pedal position sensor.
PREPARATION:
(a) Disconnect the A37 accelerator pedal position sensor
connector.
(b) Disconnect the E4 ECM connector.
CHECK:
Measure the resistance between the wire harness side connec-
tors.
OK:
Standard:
Tester ConnectionSpecified Condition
VPA (A37±6) ± VPA (E4±18)Below 1 W
EPA (A37±5) ± EPA (E4±20)Below 1 W
VCPA (A37±4) ± VCPA (E4±26)Below 1 W
VPA2 (A37±3) ± VPA2 (E4±19)Below 1 W
EPA2 (A37±2) ± EPA2 (E4±21)Below 1 W
VCP2 (A37±1) ± VCP2 (E4±27)Below 1 W
VPA (A37±6) or VPA (E4±18) ±
Body ground10 kW or higher
EPA (A37±5) or EPA (E4±20) ±
Body ground10 kW or higher
VCPA (A37±4) or VCPA (E4±26) ±
Body ground10 kW or higher
VPA2 (A37±3) or VPA2 (E4±19) ±
Body ground10 kW or higher
EPA2 (A37±2) or EPA2 (E4±21) ±
Body ground10 kW or higher
VCP2 (A37±1) or VCP2 (E4±27) ±
Body ground10 kW or higher
NG Repair or replace harness and connector.
OK

B17448
EPA (±)VCPA (+)
EPA2 (±)
VCP2 (+) Accelerator Pedal
Position Sensor
Connector
E4
A37
DI±378
± DIAGNOSTICSENGINE
572 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check voltage between terminals VCPA and EPA, and VCP2 and EPA2 of ECM
terminals.
PREPARATION:
(a) Turn the ignition switch ON.
(b) Disconnect the A37 accelerator pedal position sensor
connector.
CHECK:
Measure the voltage between the specified terminals of the E4
ECM connector.
OK:
Standard:
Tester ConnectionSpecified Condition
VCPA (E4±26) ± EPA (E4±20)4.5 to 5.5 V
VCP2 (E4±27) ± EPA2 (E4±21)4.5 to 5.5 V
NG Replace ECM (See page SF±80).
OK
4 Replace accelerator pedal assembly (See page SF±78).
Go

± 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).

FI7052DepressedReleased
± DIAGNOSTICSENGINE
DI±381
575 Author: Date:
2005 SEQUOIA (RM1146U)
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever this DTC is
not presentSee page DI±18
Either of the following conditions is metCondition 1 or 2
1. Ignition switchON
2. Throttle control motor powerON
TYPICAL MALFUNCTION THRESHOLDS
Detection CriteriaThreshold
Difference between VPA1 voltage (learned value) and VPA2
voltage (learned value)Less than 0.4 V, or more than 1.2 V
WIRING DIAGRAM
Refer to DTC P2120 on page DI±370.
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 Connect hand±held tester, and read the voltage for accelerator pedal position
sensor data.
PREPARATION:
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch ON and push the hand±held tes-
ter main switch ON.
(c) Enter the following menu: DIAGNOSIS / ENHANCED
OBD II / DATA LIST / ETCS / ACCEL POS #1 and ACCEL
POS #2.
CHECK:
Read the voltage for the accelerator pedal position sensor data.
OK:
Standard:
Accelerator pedalACCEL POS #1ACCEL POS #2
Released0.5 to 1.1 V1.2 to 2.0 V
Depressed2.6 to 4.5 V3.4 to 5.3 V
OK Replace ECM (See page SF±80).
NG