Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Tundra 2000-2006 Approved 04-06 techinfo.toyota.com ileaf 06toyrm 06toypdf 06rmsrc 06tundra di eg2uzfe cip21023

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DI-778
                                                   DIAGNOSTICS        -   ENGINE (2UZ-FE)
                                                                                                                                      DIDS0-01




    DTC                P2102                 Throttle Actuator Control Motor Circuit Low


    DTC                P2103                 Throttle Actuator Control Motor Circuit High

CIRCUIT DESCRIPTION
The throttle motor is operated by the ECM. It opens and closes the throttle valve.
The opening angle of the throttle valve is detected by the throttle position sensor which is mounted on the
throttle body. The throttle position sensor provides feedback to the ECM. This feedback allows the ECM to
control the throttle motor and monitor the throttle opening angle as the ECM responds to driver inputs.
HINT:
This Electrical Throttle Control System (ETCS) does not use a throttle cable.
   DTC No.                       DTC Detection Condition                                                 Trouble Area
             Conditions (a) and (b) continue for 2.0 seconds:
                                                                               S Open in throttle control motor and sensor circuit
             (1 trip detection logic)
    P2102                                                                      S Throttle control motor and sensor
             (a) Throttle control motor output duty 80 % or more
                                                                               S ECM
             (b) Throttle control motor current less than 0.5 A or less
                                                                               S Short in throttle control motor and sensor circuit
             Either of the following condition is met                          S Throttle control motor and sensor
    P2103    (a) Hybrid IC diagnosis met:                                      S Throttle valve
             (b) Hybrid IC current limiter port fail                           S Throttle body
                                                                               S ECM


MONITOR DESCRIPTION
The ECM monitors the current through the electronic throttle motor and detects malfunctions or open circuit
in the throttle motor based on the voltage of the current. When the current deviates from the standard, the
ECM concludes that there is a fault in the throttle motor.
Or, if the throttle valve is not functioning properly (for example, stuck ON), the ECM concludes that there is
a fault, turns on the MIL and sets a DTC is set.
Example:
When the current is more than 10 A. Or the current is less than 0.5 A when the motor driving duty ratio is
exceeding 80%. The ECM concludes that the current is out of range, turns on the MIL and a DTC is set.

FAIL SAFE
If the ETCS (Electronic Throttle Control System) has a malfunction, the ECM cuts off current to the throttle
control motor. The throttle control valve returns to a predetermined opening angle (approximately 16

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