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 cip2118

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DI-786
                                               DIAGNOSTICS   -   ENGINE (2UZ-FE)
                                                                                                                        DIDS2-01




    DTC                P2118             Throttle Actuator Control Motor Current
                                         Range/Performance

CIRCUIT DESCRIPTION
The Electronic Throttle Control System (ETCS) has a dedicated power supply circuit. The voltage (+BM) is
monitored and when the voltage is low (less than 4V), the ECM concludes that the ETCS has a fault and
current to the throttle control motor is cut.
When the voltage becomes unstable, the ETCS itself becomes unstable. For this reason, when the voltage
is low, the current to the motor is cut. If repairs are made and the system has returned to normal, turn the
ignition switch OFF. The ECM then allows current to flow to the motor and the motor can be restarted.
HINT:
This Electrical Throttle Control System (ETCS) does not use a throttle cable.




                                                                                                  ECM
                   ETCS Fuse                                                       +BM
  From Battery

             Throttle Control Motor
                                2                                                  +M
                                                                                                        Motor Control
                                                                                                        Circuit
                                  1                                                -M



                                                                                   ME01


                                                                                                                        A21430




   DTC No.                     DTC Detection Condition                                       Trouble Area
                                                                      S Open in ETCS power source circuit
   P2118      Open in ETCS power source circuit (+BM)                 S ETCS fuse
                                                                      S ECM


MONITOR DESCRIPTION
The ECM monitors the battery supply voltage applied to the electronic throttle motor +BM. When the power
supply voltage drops below the threshold, the ECM concludes that the power supply has an open circuit.
The MIL is turned on and a DTC is set.
                                                                                                                                             DI-787
                                                          DIAGNOSTICS         -   ENGINE (2UZ-FE)

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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