Toyota 2GR-FE Manual page 492

ES–336
MIL Operation
Sequence of Operation
TYPICAL ENABLING CONDITIONS
Monitor runs whenever following DTCs are not present
Battery voltage
Throttle actuator power
TYPICAL MALFUNCTION THRESHOLDS
Throttle actuator power supply voltage (+BM)
COMPONENT OPERATING RANGE
ES
Throttle actuator power supply voltage
FAIL-SAFE
When this DTC, as well as other DTCs relating to ETCS (Electronic Throttle Control System)
malfunctions, is set, the ECM enters fail-safe mode. During fail-safe mode, the ECM cuts the current to
the throttle actuator off, and the throttle valve is returned to a 6° throttle angle by the return spring. The
ECM then adjusts the engine output by controlling the fuel injection (intermittent fuel-cut) and ignition
timing, in accordance with the accelerator pedal opening angle, to allow the vehicle to continue running at
a minimal speed. If the accelerator pedal is depressed firmly and gently, the vehicle can be driven slowly.
Fail-safe mode continues until a pass condition is detected, and the ignition switch is then turned off.
WIRING DIAGRAM
2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ETCS
FL MAIN
Battery
Immediate
None
None
8 V or more
ON
Less than 4 V
9 to 14 V
3
A55 +BM
ECM
A122748E02