2001 TOYOTA SEQUOIA check engine

DIDIZ±01
D14150
D13872DLC3
OBD II Scan Tool
(Hand±held Tester)
CAN VIM
D14151
DLC3
1314 1516 12 11 10 9 12345678 DI±562
± DIAGNOSTICSAUTOMATIC TRANSMISSION
756 Author: Date:
2005 SEQUOIA (RM1146U)
DIAGNOSIS SYSTEM
DESCRIPTION
When troubleshooting On±Board Diagnostic (OBD II) vehicles,
the vehicle must be connected to the OBD II scan tool (comply-
ing with SAE J1987). Various data output from the vehicle's
ECM can then be read.
OBD II regulations require that the vehicle's on±board comput-
er illuminates the Malfunction Indicator Lamp (MIL) on the
instrument panel when the computer detects a malfunction in:
1) The emission control system/components
2) The powertrain control components (which affect vehicle
emissions)
3) The computer
In addition, the applicable Diagnostic Trouble Codes (DTCs)
prescribed by SAE J2012 are recorded in the ECM memory.
If the malfunction does not reoccur in 3 consecutive trips, the
MIL turns off automatically but the DTCs remain recorded in the
ECM memory.
To check DTCs, connect the scan tool to the Data Link Connec-
tor 3 (DLC3) of the vehicle. The scan tool displays DTCs, the
freeze frame data and a variety of the engine data.
The DTCs and freeze frame data can be erased with the scan
tool (See page DI±565).
NORMAL MODE AND CHECK MODE
The diagnosis system operates in ºnormal modeº during normal
vehicle use. In normal mode, º2±trip detection logicº is used to
ensure accurate detection of malfunctions. ºCheck modeº is
also available to technicians as an option. In check mode,
º1±trip detection logicº is used for simulating malfunction symp-
toms and increasing the system's ability to detect malfunctions,
including intermittent malfunctions.
2±TRIP DETECTION LOGIC
When a malfunction is first detected, the malfunction is tempo-
rarily stored in the ECM memory (1st trip). If the ignition switch
is turned OFF and then ON again, and the same malfunction is
detected again, the MIL will illuminate.

DI±564
± DIAGNOSTICSAUTOMATIC TRANSMISSION
758 Author: Date:
2005 SEQUOIA (RM1146U)
CHECK BATTERY VOLTAGE
Battery voltage: 11 to 14 V
If voltage is below 11 V, replace the battery before proceeding.
CHECK MIL
(a) Check that the MIL illuminates when turning the ignition
switch ON.
If the MIL does not illuminate, there is a problem in the MIL cir-
cuit (refer to MIL CIRCUIT on page DI±512)
(b) When the engine is started, the MIL should turn off.
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.

DIDJ1±01
D13872DLC3
OBD II Scan Tool
(Hand±held Tester)
CAN VIM
D14153
ON
OFF
0.13 seconds0.13 seconds DI±566
± DIAGNOSTICSAUTOMATIC TRANSMISSION
760 Author: Date:
2005 SEQUOIA (RM1146U)
CHECK MODE PROCEDURE
DESCRIPTION
Check mode has a higher sensitivity to malfunctions and can
detect malfunctions that normal mode cannot detect. Check
mode can also detect all the malfunctions that normal mode can
detect. In check mode, DTCs are detected with 1±trip detection
logic.
CHECK MODE PROCEDURE
(a) Make sure that the items below are true:
(1) Battery positive voltage 11 V or more
(2) Throttle valve fully closed
(3) Transmission in the P or N position
(4) A/C switched OFF
(b) Turn the ignition switch OFF.
(c) Connect the hand±held tester together with the Controller
Area Network Vehicle Interface Module (CAN VIM) to the
DLC3.
(d) Turn the ignition switch ON.
(e) Enter the following menus: DIAGNOSIS / ENHANCED
OBD II / CHECK MODE.
(f) Change the ECM to check mode. Make sure the MIL
flashes as shown in the illustration.
NOTICE:
All DTCs and freeze frame data recorded will be erased if:
1) the hand±held tester is used to change the ECM from
normal mode to check mode or vice±versa; or 2) during
check mode, the ignition switch is turned from ON to ACC
or LOCK.
Before check mode, make notes of the DTCs and freeze
frame data.
(g) Start the engine. The MIL should turn off after the engine
starts.
(h) Perform ºMONITOR DRIVE PATTERNº for the ECT test
(See page DI±551).
(Or, simulate the conditions of the malfunction described
by the customer).
(i) After simulating the malfunction conditions, use the
hand±held tester diagnosis selector to check the DTC
and freeze frame data.

DI±572
± DIAGNOSTICSAUTOMATIC TRANSMISSION
766 Author: Date:
2005 SEQUOIA (RM1146U)
2. ACTIVE TEST
HINT:
Performing the ACTIVE TEST using the hand±held tester allows the relay, VSV, actuator and so on to oper-
ate without parts removal. Performing the ACTIVE TEST as the first step of troubleshooting is one method
to shorten labor time.
It is possible to display the DATA LIST during the ACTIVE TEST.
(a) Warm up the engine.
(b) Turn the ignition switch off.
(c) Connect the hand±held tester to the DLC3.
(d) Turn the ignition switch to the ON position.
(e) Turn on the tester.
(f) Select the item ºDIAGNOSIS / ENHANCED OBD II / ACTIVE TESTº.
(g) According to the display on the tester, perform the ºACTIVE TESTº.
ItemTest DetailsDiagnostic Note
SHIFT
[Test Details]
Operate the shift solenoid valve and set each shift position by yourself.
[Vehicle Condition]
Less than 50 km/h (31 mph)
[Others]

Press º"º button: Shift up

Press ºuº button: Shift down
Possible to check the operation of
the shift solenoid valves.
LOCK UP
[Test Details]
Control the shift solenoid SLU to set the automatic transmission to the
lock±up condition.
[Vehicle Condition]

Throttle valve opening angle: Less than 35 %

Vehicle Speed: 60 km/h (37 mph) or more
Possible to check the SLU opera-
tion.
LINE PRESS UP *
[Test Details]
Operate the shift solenoid SLT and raise the line pressure.
[Vehicle Condition]

Vehicle Stopped.

IDL: ON
[HINT]
OFF: Line pressure up (When the active test of ºControl the Line Pres-
sure Upº is performed, the ECM commands the SLT solenoid to turn
off).
ON: No action (normal operation)
±
*: ºLINE PRESS UPº in the ACTIVE TEST is performed to check the line pressure changes by connecting
the SST to the automatic transaxle, which is used in the HYDRAULIC TEST (See page DI±540) as well.
HINT:
The pressure values in ACTIVE TEST and HYDRAULIC TEST are different from each other.

A67628A67628D14156
Acceptable
Resistance
Te m p .
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±583
777 Author: Date:
2005 SEQUOIA (RM1146U)
CIRCUIT DESCRIPTION
The ATF (Automatic Transmission Fluid) temperature sensor
converts the fluid temperature into a resistance value which is
input into the ECM.
The ECM applies a voltage to the temperature sensor through
ECM terminal THO1.
The sensor resistance changes with the transmission fluid tem-
perature. As the temperature becomes higher, the sensor resis-
tance decreases.
One terminal of the sensor is grounded so that the sensor resis-
tance decreases and the voltage goes down as the tempera-
ture becomes higher.
The ECM calculates the fluid temperature based on the voltage
signal.
DTC No.DTC Detection ConditionTrouble Area
P0710
(a) and (b) are detected momentarily within 0.5 sec. when
neither P0712 nor P0713 is detected (1±trip detection logic)
(a) ATF temperature sensor No.1 resistance is less than 79 W.
(b) ATF temperature sensor No.1 resistance is more than 156
kW.
HINT:
Within 0.5 sec., the malfunction switches from (a) to (b) or from
(b) to (a)

Open or short in ATF temperature sensor No.1 circuit

Transmission wire (ATF temperature sensor No.1)

ECM
P0712ATF temperature sensor No.1 resistance is less than 79 W for
0.5 sec. or more (1±trip detection logic)
Short in ATF temperature sensor No.1 circuit

Transmission wire (ATF temperature sensor No.1)

ECM
P0713
ATF temperature No.1 sensor resistance is more than 156 kW
when 15 minutes or more have elapsed after the engine start
DTC is detected for 0.5 sec. or more (1±trip detection logic)
Open in ATF temperature sensor No.1 circuit

Transmission wire (ATF temperature sensor No.1)

ECM
MONITOR DESCRIPTION
These DTCs indicate an open or short in the automatic transmission fluid (ATF) temperature sensor circuit.
The automatic transmission fluid (ATF) temperature sensor converts ATF temperature to an electrical resis-
tance value. Based on the resistance, the ECM determines the ATF temperature, and the ECM detects an
open or short in the ATF temperature circuit. If the resistance value of the ATF temperature is less than 79W
*1
or more than 156kW*2, the ECM interprets this as a fault in the ATF sensor or wiring. The ECM will turn on
the MIL and store the DTC.
*1: 150C (302F) or more is indicated regardless of the actual ATF temperature.
*2: ±40C (±40F) is indicated regardless of the actual ATF temperature.
HINT:
The ATF temperature can be checked on the OBD II scan tool or hand±held tester display.

DI±584
± DIAGNOSTICSAUTOMATIC TRANSMISSION
778 Author: Date:
2005 SEQUOIA (RM1146U)
MONITOR STRATEGY
P0710ATF temperature sensor/Range check (Fluttering)
Related DTCsP0712ATF temperature sensor/Range check (Low resistance)Related DTCs
P0713ATF temperature sensor/Range check (High resistance)
Required sensors/ComponentsATF temperature sensor (TFT sensor)
Frequency of operationContinuous
Duration0.5 sec.
MIL operationImmediate
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever these
DTCs are not present.See page DI±545
Range check (Fluttering, Low resistance)
The typical enabling condition is not avail-
able.±
Range check (High resistance)
Time after engine start15 min. or more±
TYPICAL MALFUNCTION THRESHOLDS
Detection criteriaThreshold
Range check (Fluttering)
TFT (transmission fluid temperature) sensor resistance
Less than 79 W
or
More than 156 kW
Range check (Low resistance)
TFT (transmission fluid temperature) sensor resistanceLess than 79 W
Range check (High resistance)
TFT (transmission fluid temperature) sensor resistanceMore than 156 kW
COMPONENT OPERATING RANGE
ParameterStandard value
TFT (transmission fluid temperature) sensorAtmospheric temperature to approx. 130°C (266°F)

DI±588
± DIAGNOSTICSAUTOMATIC TRANSMISSION
782 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P0711 Transmission Fluid Temperature Sensor ºAº
Performance
CIRCUIT DESCRIPTION
See page DI±582.
DTC No.DTC Detection ConditionTrouble Area
P0711
Both (a) and (b) are detected: (2±trip detection logic)
(a) Intake air and engine coolant temps. are more than ±20°C
(±4F) at engine start
(b) After normal driving for over 22 min. and 9 km (6 mile) or
more, ATF temp. is less than 10°C (50F)

Transmission wire (ATF temperature sensor No.1)
MONITOR DESCRIPTION
This DTC indicates that there is a problem with output from the automatic transmission fluid (ATF) tempera-
ture sensor and that the sensor itself is defective. The ATF temperature sensor converts the ATF tempera-
ture to an electrical resistance value. Based on the resistance, the ECM determines the ATF temperature
and detects an open or short in the ATF temperature circuit or a fault in the ATF temperature sensor.
After running the vehicle for a certain period, the ATF temperature should increase. If the ATF temperature
is below 20C (68F) after running the vehicle for a certain period, the ECM interprets this as a fault, and
turns on the MIL.
MONITOR STRATEGY
Related DTCsP0711ATF temperature sensor/Rationality check
Required sensors/ComponentsATF temperature sensor (TFT sensor)
Frequency of operationContinuous
Duration3 sec.
MIL operation2 driving cycles
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever this DTC is
not present.See page DI±545
TFT (transmission fluid temperature) sen-
sor circuitNot circuit malfunction
ECT (Engine coolant temperature) sensor
circuitNot circuit malfunction
IAT (Intake air temperature) sensor circuitNot circuit malfunction
Time after engine start21 min. and 40 sec.
Driving distance after engine start9 km (5.6 mile) or more±
IAT (12 sec. after engine start)±10°C (14°F) or more±
ECT (12 sec. after engine start)±10°C (14°F) or more±
DIDJ7±01

D14162
Clutch Drum
(Timing Rotor)
Input Speed Sensor NT
(Transmission Revolution Sensor NT)Output Speed Sensor SP2
(Transmission Revolution Sensor SP2)
Parking Gear
(Timing Rotor)
D14148
GND
1 V/DIV
2 ms/DIV
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±591
785 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P0717 Input Speed Sensor Circuit No Signal
CIRCUIT DESCRIPTION
This sensor detects the rotation speed of the turbine which shows the input revolution of transmission. By
comparing the input turbine speed signal (NT) with the counter gear speed sensor signal (SP2), the ECM
detects the shift timing of the gears and appropriately controls the engine torque and hydraulic pressure ac-
cording to various conditions, thus, providing smooth gear shift.
DTC No.DTC Detection ConditionTrouble Area
P0717
All conditions below are detected for 5 secs. or more
(1±trip detection logic)
(a) Gear change is not performed
(b) Gear position: 4th or 5th
(c) T/M input shaft rpm: 300 rpm or less
(d) T/M output shaft rpm: 1,000 rpm or more
(e) Park/neutral position switch:

NSW input signal is OFF

R input signal is OFF

L input signal is OFF
(f) Shift solenoid valves, park/neutral position switch and ve-
hicle speed sensor are in normal operation

Open or short in speed sensor (NT) circuit

Speed sensor (NT)

ECM

Automatic transmission (clutch, brake or gear, etc.)
Reference (Using an oscilloscope):
Check the waveform between terminals NT+ and NT± of
the ECM connector.
Standard: Refer to the illustration.
TerminalNT+ ± NT±
Tool setting1V/DIV, 2ms/DIV
Vehicle conditionEngine idle speed (P or N position)
DIDJ8±01