Toyota Sequoia (2005). Manual - part 180

DIDIH–01

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

DI–515

709

AUTOMATIC TRANSMISSION

PRECAUTION

NOTICE:
Perform the RESET MEMORY (AT initialization) when replacing the automatic transmission assy, en-
gine assy or ECM

 

(See page 

DI–543

).

HINT:
RESET MEMORY cannot be completed by only disconnecting the battery terminal.
NOTICE:
When disconnecting the battery terminal, initialize the following system after the terminal is recon-
nected.

System Name

See Page

Back Door Power Window Control System

BE–77

DIDII–01

DI–516

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

710

DEFINITION OF TERMS

Term

Definition

Monitor description

Description of what the ECM monitors and how it detects malfunctions (monitoring purpose and its details).

Related DTCs

A group of diagnostic trouble codes that are output by the ECM based on the same malfunction detection logic.

Typical enabling condition

Preconditions that allow the ECM to detect malfunctions.

With all preconditions satisfied, the ECM sets the DTC when the monitored value(s) exceeds the malfunction

threshold(s).

Sequence of operation

The priority order that is applied to monitoring, if multiple sensors and components are used to detect the malfunc-

tion. 

While another sensor is being monitored, the next sensor or component will not be monitored until the previous

monitoring has concluded.

Required sensor/compo-

nents

The sensors and components that are used by the ECM to detect malfunctions.

Frequency of operation

The number of times that the ECM checks for malfunctions per driving cycle. 

”Once per driving cycle” means that the ECM detects malfunction only one time during a single driving cycle. 

”Continuous” means that the ECM detects malfunction every time when enabling condition is met.

Duration

The minimum time that the ECM must sense a continuous deviation in the monitored value(s) before setting a

DTC. This timing begins after the ”typical enabling conditions” are met.

Malfunction thresholds

Beyond this value, the ECM will conclude that there is a malfunction and set a DTC.

MIL operation

MIL illumination timing after a defect is detected. 

”Immediately” means that the ECM illuminates MIL the instant the ECM determines that there is a malfunction. 

”2 driving cycle” means that the ECM illuminates MIL if the same malfunction is detected again in the 2nd driving

cycle.

Component operating range

Normal operation range of sensors and solenoids under normal driving conditions. 

Use these ranges as a reference.

They cannot be used to judge if a sensor or solenoid is defective or not.

DIDIJ–01

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

DI–517

711

TOYOTA PART AND SYSTEM NAME LIST

This reference list indicates the part names used in this manual along with their definitions.

Part and system name

Definition

Toyota HCAC system, Hydrocarbon adsorptive Catalyst
(HCAC) system, HC adsorptive three–way catalyst

HC adsorptive three–way catalytic converter

Variable Valve Timing sensor, VVT sensor

Camshaft position sensor

Variable valve timing system, VVT system

Camshaft timing control system

Camshaft timing oil control valve, Oil control valve OCV,
VVT, VSV

Camshaft timing oil control valve

Variable timing and lift, VVTL

Camshaft timing and lift control

Crankshaft position sensor ”A”

Crankshaft position sensor

Engine speed sensor

Crankshaft position sensor

THA

Intake air temperature

Knock control module

Engine knock control module

Knock sensor

Engine knock sensor

Mass or volume air flow circuit

Mass air flow sensor circuit

Vacuum sensor

Manifold air pressure sensor

Internal control module, Control module, Engine control
ECU, PCM

Power

 

train control module

FC idle

Deceleration fuel cut

Idle air control valve

Idle speed control

VSV for CCV, Canister close valve VSV for canister control

Evaporative emissions canister vent valve

VSV for EVAP, Vacuum switching valve assembly No. 1,
EVAP VAV, Purge VSV

Evaporative emissions canister purge valve

VSV for pressure switching valve, Bypass VSV

Evaporative emission pressure switching valve

Vapor pressure sensor, EVAP pressure sensor, Evaporative
emission control system pressure sensor

Fuel tank pressure sensor

Charcoal canister

Evaporative emissions canister

ORVR system

On–board refueling vapor recovery system

Intake manifold runner control

Intake manifold tuning system

Intake manifold runner valve, IMRV, IACV (runner valve)

Intake manifold tuning valve

Intake control VSV

Intake manifold tuning solenoid valve

AFS

Air fuel ratio sensor

O2 sensor

Heater oxygen sensor

Oxygen sensor pumping current circuit

Oxygen sensor output signal

Oxygen sensor reference ground circuit

Oxygen sensor signal ground

Accel position sensor

Accelerator pedal position sensor

Throttle actuator control motor, Actuator control motor, Elec-
tronic throttle motor, Throttle control motor

Electronic throttle actuator

Electronic throttle control system, Throttle actuator control
system

Electronic throttle control system

Throttle/pedal position sensor, Throttle/pedal position switch,
Throttle position sensor/switch

Throttle position sensor

Turbo press sensor

Turbocharger pressure sensor

Turbo VSV

Turbocharger pressure control solenoid valve

P/S pressure switch

Power–steering pressure switch

VSV for ACM

Active control engine mount

Speed sensor, Vehicle speed sensor ”A”, Speed sensor for
skid control ECU

Vehicle speed sensor

ATF temperature sensor, Trans. fluid temp. sensor, ATF
temperature sensor ”A”

Transmission fluid temperature sensor

Electronic controlled automatic transmission, ECT

Electronically controlled automatic

Intermediate shaft speed sensor ”A”

Counter gear speed sensor

DI–518

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

712

Output speed sensor

Output shaft speed sensor

Input speed sensor, Input turbine speed sensor ”A”, Speed
sensor (NT), Turbine speed sensor

Input turbine speed sensor

PNP switch, NSW

Park/neutral position switch

Pressure control solenoid

Transmission pressure control solenoid

Shift solenoid

Transmission shift solenoid valve

Transmission control switch, Shift lock control unit

Shift lock control module

Engine immobilizer system, Immobilizer system

Vehicle anti–theft system