2001 TOYOTA SEQUOIA ESP

 DTC No.
Indicates the diagnostic trouble code.
 Page or Instructions
Indicates the page where the inspection procedure
for each circuit is to be found, or gives instructions
for checking and repairs.
 Detection Item
Indicates the system of the problem or
contents of the problem. Trouble Area
Indicates the suspect area of the
problem.
Mass Air Flow Circuit MalfunctionDetection Item
 Open or short in mass air flow meter circuit
 Mass air flow meter
 ECM DTC No.
(See page)Trouble AreaMIL* MemoryP0100
(DI±24)
P0101
(DI±28)
P0115
(DI±33) Open or short in intake air temp. sensor
circuit
 Intake air temp. sensor
 ECM Intake Air Temp. Circuit
Malfunction P0110
(DI±29)
 Open or short in engine coolant temp. sensor circuit
 Engine coolant temp. sensor
 ECM
Throttle/ Pedal Position Sensor/Switch
ºAº Circuit MalfunctionEngine Coolant Temp.
Circuit Malfunction
 Open or short in throttle position sensor circuit
 Throttle position sensor
 ECM
DTC CHART (SAE Controlled)
HINT:
Parameters listed in the chart may not be exactly the same as your reading due to the type of instrument or other
factors.
If a malfunction code is displayed during the DTC check mode, check the circuit for that code listed in the table
below. For details of each code, turn to the page referred to under the ºSee pageº for the respective ºDTC No.º
in the DTC chart.
Mass Air Flow Circuit
Range/ Performance Problem Mass air flow meter
 Throttle position sensor Throttle/ Pedal Position Sensor/ Switch
ºAº Circuit Range / Performance Prob-
lem P0116
(DI±37)Engine Coolant Temp.
Circuit Range/ Performance Problem Engine coolant temp. sensor
 Cooling system
± INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMSIN±31
31 Author: Date:
2005 SEQUOIA (RM1146U)
4. DIAGNOSTIC TROUBLE CODE CHART
The inspection procedure is shown in the table below. This table permits efficient and accurate troubleshoot-
ing using the diagnostic trouble codes displayed in the diagnostic trouble code check. Proceed with trouble-
shooting in accordance with the inspection procedure given in the diagnostic chart corresponding to the
diagnostic trouble codes displayed. The engine diagnostic trouble code chart is shown below as an example.

MA001±42
± MAINTENANCEOUTSIDE VEHICLE
MA±1
48 Author: Date:
2005 SEQUOIA (RM1146U)
OUTSIDE VEHICLE
GENERAL MAINTENANCE
The owners are responsible for these maintenance and inspection items.
They can be done by the owner or they can have them done at a service shop.
These items include those which should be checked on a daily basis, those which, in most cases, do not
require (special) tools and those which are considered to be reasonable for the owner to do.
Items and procedures for general maintenance are as follows.
1. GENERAL NOTES

Maintenance items may vary from country to country. Check the owner's manual supplement in which
the maintenance schedule is shown.

Every service item in the periodic maintenance schedule must be performed.

Periodic maintenance service must be performed according to whichever interval in the periodic main-
tenance schedule occurs first, the odometer reading (miles) or the time interval (months).

Maintenance service after the last period should be performed at the same interval as before unless
otherwise noted.

Failure to do even one item can cause the engine to run poorly and increase exhaust emissions.
2. TIRES
(a) Check the pressure with a gauge.
If necessary, adjust.
(b) Check for cuts, damage or excessive wear.
3. WHEEL NUTS
When checking the tires, check the nuts for looseness or for missing.
If necessary, tighten them.
4. TIRE ROTATION (See page SA±3)
Check the owner's manual supplement in which the maintenance schedule is shown.
5. WINDSHIELD WIPER BLADES
Check for wear or cracks whenever they do not wipe clean.
If necessary, replace.
6. FLUID LEAKS
(a) Check underneath for leaking fuel, oil, water or other fluid.
(b) If you smell gasoline fumes or notice any leak, find the cause and correct.
7. DOORS AND ENGINE HOOD
(a) Check that all doors and the tailgate operate smoothly, and that all latches lock securely.
(b) Check that the engine hood secondary latch secures the hood from opening when the primary latch
is released.

MA002±35
MA±2
± MAINTENANCEINSIDE VEHICLE
49 Author: Date:
2005 SEQUOIA (RM1146U)
INSIDE VEHICLE
GENERAL MAINTENANCE
These are maintenance and inspection items which are considered to be the owner's responsibility.
They can be done by the owner or they can have them done at a service shop.
These items include those which should be checked on a daily basis, those which, in most cases, do not
require (special) tools and those which are considered to be reasonable for the owner to do.
Items and procedures for general maintenance are as follows.
1. GENERAL NOTES

Maintenance items may vary from country to country. Check the owner's manual supplement in which
the maintenance schedule is shown.

Every service item in the periodic maintenance schedule must be performed.

Periodic maintenance service must be performed according to whichever interval in the periodic main-
tenance schedule occurs first, the odometer reading (miles) or the time interval (months).

Maintenance service after the last period should be performed at the same interval as before unless
otherwise noted.

Failure to do even one item can cause the engine to run poorly and increase exhaust emissions.
2. LIGHTS
(a) Check that the headlights, stop lights, taillights, turn signal lights, and other lights are all working.
(b) Check the headlight aim.
3. WARNING LIGHTS AND BUZZERS
Check that all warning lights and buzzers function properly.
4. HORN
Check that it is working.
5. WINDSHIELD GLASS
Check for scratches, pits or abrasions.
6. WINDSHIELD WIPER AND WASHER
(a) Check operation of the wipers and washer.
(b) Check that the wipers do not streak.
7. WINDSHIELD DEFROSTER
Check that air comes out from the defroster outlet when operating the heater or air conditioner.
8. REAR VIEW MIRROR
Check that it is mounted securely.
9. SUN VISORS
Check that they move freely and are mounted securely.
10. STEERING WHEEL
Check that it has the specified free play. Be alert for changes in steering condition, such as hard steering,
excessive free play or strange noises.
11. SEATS
(a) Check that the seat adjusters operate smoothly.
(b) Check that all latches lock securely in any position.
(c) Check that the head restraints move up and down smoothly and that the locks hold securely in any
latch position.
(d) For fold±down seat backs, check that the latches lock securely.
12. SEAT BELTS
(a) Check that the seat belt system such as the buckles, retractors and anchors operate properly and
smoothly.
(b) Check that the belt webbing is not cut, frayed, worn or damaged.

B02100
± MAINTENANCECHASSIS
MA±11
58 Author: Date:
2005 SEQUOIA (RM1146U)

Leaf spring U±bolt mounting nuts
Torque: 133 N´m (1,350 kgf´cm, 98 ft´lbf )
(b) Under Severe Conditions:
In addition to the above maintenance items, check for
loose or missing bolts and nuts on the following.

Steering system

Drive train

Suspension system

Fuel tank mounts

Engine mounts, etc.
14. FINAL INSPECTION
(a) Check operation of body parts:

Hood:

Auxiliary catch operates properly

Hood locks securely when closed

Doors:

Door locks operate properly

Doors close properly

Seats:

Seat adjusts easily and locks securely in any
positions

Seat backs lock securely at any angle

Fold±down seat backs lock securely
(b) Road test:

Engine and chassis parts do not have abnormal
noises.

Vehicle does not wander or pull to one side.

Brakes work properly and do not drag.
(c) Be sure to deliver a clean vehicle and especially check:

Steering wheel

Shift lever knob

All switch knobs

Door handles

Seats

DID7T±01
DI±14
± DIAGNOSTICSENGINE
208 Author: Date:
2005 SEQUOIA (RM1146U)
REGISTRATION
NOTICE:
The Vehicle Identification Number (VIN) must be input into the replacement ECM.
HINT:
The VIN is in the form of a 17±digit alphanumeric vehicle identification number. A hand±held tester is re-
quired to register the VIN.
1. DESCRIPTION
This registration section consists of three parts, Input Instructions, Read VIN and Write VIN.
(a) Input Instructions: Explains the general VIN input instructions using a hand±held tester.
(b) Read VIN: Explains the VIN reading process in a flowchart. This process allows the VIN stored in the
ECM to be read, in order to confirm that the two VINs, provided with the vehicle and stored in the ve-
hicle's ECM, are the same.
(c) Write VIN: Explains the VIN writing process in a flowchart. This process allows the VIN to be input into
the ECM. If the ECM is changed, or the VIN and VIN do not match, the VIN can be registered, or over-
written in the ECM by following this procedure.
2. INPUT INSTRUCTIONS
(a) Hand±held tester
The arrow buttons (UP, DOWN, RIGHT and LEFT) and numerical buttons (0 to 9) are used, in order
to input the VIN.
(b) Cursor Operation
To move the cursor around the tester screen, press the RIGHT and LEFT buttons.
(c) Alphabetical Character Input
(1) Press the UP and DOWN buttons to select the desired alphabetical character.
(2) After selection, the cursor should move.
(d) Numeric Character Input
(1) Press the numerical button corresponding to the number that you want to input.
(2) Select or input the correct character using the UP/DOWN buttons, or the numerical buttons.
HINT:
Numerical characters can be selected by using the UP and DOWN buttons.
(e) Correction
(1) After input, the cursor should move.
(2) When correcting the input character(s), put the cursor onto the character using the RIGHT or
LEFT buttons.
(f) Finishing Input Operation
(1) Make sure that the input VIN matches the vehicle VIN after input.
(2) Press the ENTER button on the tester.

START
Confirm vehicle VIN
Preparation:
1. Connect hand±held tester to DLC3
2. Turn ignition switch to ON
3. Turn tester ON
Hand±held tester operation:
1. Select DIAGNOSIS
2. Select ENHANCED OBD ll
READ:
Menu Screen:
*********************************
[ VIN ]
*********************************
PRESS [EXIT]
ERROR
PRESS [EXIT] DTC P0630 was detected.
P0630 [VIN Not Programmed
or Mismatch ± ECM/PCM]
Please input the VIN.
PRESS [EXIT] Possible cause:
To Menu Screen
17±digit VIN
displayed 3. Select VIN
DTC P0630 Set VIN Previously StoredVIN Not Stored
[EXIT] [EXIT][EXIT] 2. VIN WRITEVIN
Select VIN READ
1. VIN READ 1. VIN READ
ERROR
ECM does not respond the VIN.
1: VIN is not written yet.
2: Vehicle does not support this
function.
± DIAGNOSTICSENGINE
DI±15
209 Author: Date:
2005 SEQUOIA (RM1146U)
3. READ VIN (Vehicle Identification Number)
(a) Read VIN using a hand±held tester.

DI±42
± DIAGNOSTICSENGINE
236 Author: Date:
2005 SEQUOIA (RM1146U)

If the communication is still impossible when the tool is
connected to another vehicle, the problem is probably in
the tool itself, so consult the Service Department listed in
the tool's instruction manual.
5. INSPECT BATTERY VOLTAGE
Battery Voltage: 11 to 14 V
If voltage is below 11 V, recharge the battery before proceeding.
6. CHECK MIL
(a) The MIL comes on when the ignition switch is turned ON
and the engine is not running.
HINT:
If the MIL is not illuminated, troubleshoot the MIL circuit (See
page DI±512).
(b) When the engine is started, the MIL should not illuminate.
If the lamp remains on, the diagnosis system has de-
tected a malfunction or abnormality in the system.
7. ALL READINESS
For this vehicle, using the hand±held tester allows readiness
codes corresponding to all DTCs to be read. When diagnosis
(normal or malfunctioning) has been complete, readiness
codes are set. Enter the following menus: ENHANCED OBD II
/ MONITOR STATUS on the hand±held tester.

DI3HB±12
DI±58
± DIAGNOSTICSENGINE
252 Author: Date:
2005 SEQUOIA (RM1146U)
DIAGNOSTIC TROUBLE CODE CHART
HINT:
Parameters listed in the chart may not be exactly the same as your reading due to the type of instrument
or other factors.
If a malfunction code is displayed during the DTC check in check mode, check the circuit for the codes listed
in the table below. For details of each code, refer to the ºSee pageº under the respective ''DTC No.'' in the
DTC chart.
DTC No.
(See page)Detection ItemTrouble AreaMIL*1Memory
P0010
(DI±73)Camshaft Position ºAº Actuator
Circuit (Bank 1)
Open or short in OCV circuit

OCV

ECM

P0011
(DI±79)Camshaft Position ºAº ±Timing
Over± Advanced or System Per-
formance (Bank 1)
Valve timing

OCV

VVT controller assembly

ECM

P0012
(DI±79)Camshaft Position ºAº ±Timing
Over± Retarded (Bank 1)

Valve timing

OCV

VVT controller assembly

ECM

P0016
(DI±85)Crankshaft Position ± Camshaft
Position Correlation (Bank 1
Sensor A)
Open or short in VVT sensor circuit

VVT sensor

ECM

P0018
(DI±85)Crankshaft Position ± Camshaft
Position Correlation (Bank 2
Sensor A)
Open or short in VVT sensor circuit

VVT sensor

ECM

P0020
(DI±73)Camshaft Position ºAº Actuator
Circuit (Bank 2)
Open or short in OCV circuit

OCV

ECM

P0021
(DI±79)Camshaft Position ºAº ±Timing
Over± Advanced or System Per-
formance (Bank 2)
Valve timing

OCV

VVT controller assembly

ECM

P0022
(DI±79)Camshaft Position ºAº ±Timing
Over± Retarded (Bank 2)

Valve timing

OCV

VVT controller assembly

ECM

P0031
(DI±88)Oxygen (A/F) Sensor Heater
Control Circuit Low (Bank 1 Sen-
sor 1)
Open in heater circuit of A/F sensor

A/F sensor heater

A/F relay

ECM

P0032
(DI±88)Oxygen (A/F) Sensor Heater
Control Circuit High (Bank 1
Sensor 1)
Short in heater circuit of A/F sensor

A/F sensor heater

A/F relay

ECM

P0037
(DI±93)Oxygen Sensor Heater Control
Circuit Low (Bank 1 Sensor 2)

Open in heater circuit of heated oxygen sensor

Heated oxygen sensor heater

EFI relay

ECM

P0038
(DI±93)Oxygen Sensor Heater Control
Circuit High (Bank 1 Sensor 2)

Short in heater circuit of heated oxygen sensor

Heated oxygen sensor heater

EFI relay

ECM