Toyota Tundra 2005 Service - Repair - Maintenance page 1913

SFI (1GR−FE)
THROTTLE BODY
ON−VEHICLE INSPECTION
1.
(a)
(b)
If operation is not as specified, check the throttle control motor
A23221
(see page DI−283), wiring and ECM.
2.
(a)
(b)
(c)
If operation is not as specified, check the accelerator pedal
position sensor (see page DI−299), the wiring and the ECM.
If not using a hand−held tester, measure the voltage between
the terminals (VTA1 − E2, VTA2 − E2) of the ECM connector
(see page DI−34).
3.
(a)
(b)
(c)
NOTICE:
Perform inspection without an electrical load.
4.
Using an ohmmeter, measure the resistance between the ter-
minals.
M+ M−
A23222
− THROTTLE BODY
CHECK FOR OPERATING SOUND
Turn the ignition switch to the ON position.
When turning the accelerator pedal position sensor lever,
listen to the running sound of the motor. Also, check that
there is no friction sound.
INSPECT THROTTLE POSITION SENSOR
Connect the hand−held tester to the DLC3.
Turn the ignition switch to the ON position.
When turning the accelerator pedal position sensor lever
to the full−open position, check the percentage of the
throttle valve opening angle (THROTTLE POS) of the
CURRENT DATA.
Standard percentage of the valve opening angle:
60 % or more
INSPECT AIR ASSIST SYSTEM
Start the engine and check that the MIL does not illumi-
nate.
Let the engine warm up to the normal operating tempera-
ture.
Switch the A/C compressor from ON to OFF, and check
the idle speed.
Idle speed (Transmission in neutral): 650 to 750 rpm
INSPECT THROTTLE BODY RESISTANCE
Terminal No.
2 (M+) 1 (M−)
SF−39
Resistance
0.3 to 100 Ω at 20 _C (68 _F)
SF1YR−01