2GR-FE ENGINE CONTROL SYSTEM
– SFI SYSTEM
ES–335
ES
DESCRIPTION
The ETCS (Electronic Throttle Control System) has a dedicated power supply circuit. When the monitored
voltage (+BM) is low (less than 4 V), the ECM determines that there is a malfunction in the ETCS and cuts
off the current to the throttle actuator.
When the voltage becomes unstable, the ETCS itself becomes unstable. For this reason, when the
voltage is low, the current to the throttle actuator is cut. If repairs are made and the system returns to
normal, turn the ignition switch off. The ECM then allows the current to flow to the throttle actuator so that
it can be restarted.
HINT:
The ETCS does not use a throttle cable.
MONITOR DESCRIPTION
The ECM monitors the battery supply voltage applied to the throttle actuator.
When the power supply voltage (+BM) drops below 4 V for 0.8 seconds or more, the ECM interprets this
as an open in the power supply circuit (+BM). The ECM illuminates the MIL and sets the DTC.
If the malfunction is not repaired successfully, the DTC is set 5 seconds after the engine is next started.
MONITOR STRATEGY
DTC
P2118
Throttle Actuator Control Motor Current Range
/ Performance
DTC No.
DTC Detection Condition
Trouble Area
P2118
Open in ETCS power source (+BM) circuit
(1 trip detection logic)
•
Open in ETCS power source circuit
•
ETCS fuse
•
ECM
Related DTCs
P2118: Throttle actuator power supply
Required Sensors/Components (Main)
Throttle actuator, throttle valve, ETCS fuse
Required Sensors/Components (Sub)
None
Frequency of Operation
Continuous
Duration
0.8 seconds
From
Battery
Throttle Actuator
ETCS
ECM
+BM
ME01
+M
-M
Throttle
Actuator
Control
Circuit
A085832E02
Содержание 2GR-FE
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