DTC P2118 Throttle Actuator Control Motor Current Range / Performance
DESCRIPTION
The ETCS (Electronic Throttle Control System) has a dedicated power supply circuit. The voltage (+BM) is monitored and when it 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
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
COMPONENT OPERATING RANGE
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 at a minimal speed. If the accelerator pedal is depressed 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
INSPECTION PROCEDURE
HINT: Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.
1 CHECK FUSE (ETCS FUSE)
Standard resistance: Below 1 Ω
2 INSPECT ECM (+BM VOLTAGE)
Standard voltage
3 CHECK HARNESS AND CONNECTOR (ECM - ETCS FUSE)
Standard resistance: Check for open
Check for short
4 CHECK HARNESS AND CONNECTOR (ETCS FUSE - BATTERY)
Standard resistance: Check for open
Check for short
REPLACE ECM
Brake System Malfunction
DTC P1578 Brake System Malfunction
DESCRIPTION
This DTC is output when the VSC system has a problem. Check the VSC system
when this DTC is
output
DTC No.
DTC Detection Condition
Trouble Area
P1578
The ECM receives a brake system error signal for 0.2
...
Power window master
switch
Inspection
1. INSPECT POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY (w/ Jam
Protection Function)
Check the resistance between the terminals of the
switch when the switch is operated.
Standard:
AUTO (driver side) switch
Passenger side switch
Rear LH switch
Rear RH switch
...
On-vehicle inspection
1. CONNECT INTELLIGENT TESTER
(a) Connect the intelligent tester to the DLC3.
(b) Start the engine and run at idle.
(c) Select the ACTIVE TEST mode on the intelligent
tester.
HINT:
Please refer to the intelligent tester operator's
manual for further details.
2. INSPECT ACTUATOR MOTOR ...