e. Read the value displayed on the Techstream.
OK: The difference between the coolant temperature and the actual outside air temperature
is within 10°C (18°F).
HINT:
If the result is not as specified, check that there are heat sources such as a block heater in the engine
compartment.
NG : REPLACE ENGINE COOLANT TEMPERATURE SENSOR (See REMOVAL )
OK : REPLACE ECM (See REMOVAL )
DTC P0120 THROTTLE/PEDAL POSITION SENSOR/SWITCH "A" CIRCUIT MALFUNCTION;
DTC P0122 THROTTLE/PEDAL POSITION SENSOR/SWITCH "A" CIRCUIT LOW INPUT; DTC
P0123 THROTTLE/PEDAL POSITION SENSOR/SWITCH "A" CIRCUIT HIGH INPUT; DTC P0220
THROTTLE/PEDAL POSITION SENSOR/SWITCH "B" CIRCUIT; DTC P0222 THROTTLE/PEDAL
POSITION SENSOR/SWITCH "B" CIRCUIT LOW INPUT; DTC P0223 THROTTLE/PEDAL
POSITION SENSOR/SWITCH "B" CIRCUIT HIGH INPUT; DTC P2135 THROTTLE/PEDAL
POSITION SENSOR/SWITCH "A"/"B" VOLTAGE CORRELATION
DESCRIPTION
The TP sensor is mounted on the throttle body, and detects the opening angle of the throttle valve. This sensor is
a non-contact type. It uses Hall-effect elements in order to yield accurate signals even in extreme driving
conditions, such as at high speeds as well as very low speeds.
The TP sensor has 2 sensor circuits, each of which transmits a signal, VTA1 and VTA2. VTA1 is used to detect
the throttle valve angle and VTA2 is used to detect malfunctions in VTA1. The sensor signal voltages vary
between 0 V and 5 V in proportion to the throttle valve opening angle, and are transmitted to the VTA terminals
of the ECM.
As the valve closes, the sensor output voltage decreases and as the valve opens, the sensor output voltage
increases. The ECM calculates the throttle valve opening angle according to these signals and controls the
throttle actuator in response to driver inputs. These signals are also used in calculations such as air-fuel ratio
correction, power increase correction and fuel-cut control.
2008 Toyota Tundra
2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra