DTC Advanced Diagnostics: P2118
DTC P2118:Throttle Actuator Current Range/Performance Problem

General Description

The electronic throttle control system controls the throttle valve opening. The system includes the throttle actuator, the throttle valve, throttle position (TP) sensors A and B, the PGM-FI subrelay circuit, the accelerator pedal position (APP) sensor, and the powertrain control module (PCM). When the accelerator pedal is pressed, the APP sensor detects the accelerator pedal opening value. The accelerator pedal opening value is converted to a signal in the APP sensor and transmitted to the PCM to compute the target position. The PCM determines the throttle valve target position according to the signal received and operates the throttle actuator to move the throttle valve to the target position. The actual throttle valve position is determined by TP sensor A (installed in the throttle body). When the output current to the throttle valve actuator exceeds the specification for a set time, the PCM detects a malfunction of the electronic throttle control system and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type
Execution
Continuous
Sequence
None
Duration
200 milliseconds or more
DTC Type
One drive cycle, MIL on

Enable Conditions
Condition
Minimum
Maximum
12 volt battery voltage [BATTERY]
6.0 V
–
Vehicle
ON mode
[ ]: HDS Parameter

Malfunction Threshold
The current flow to the throttle actuator is 9 A or more for at least 200 milliseconds.

Possible Cause
NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
PCM internal circuit failure
Throttle actuator MTR1 line short
Throttle actuator MTR2 line short
Throttle actuator MTR1 line short to throttle actuator MTR2 line
Throttle body internal failure

Confirmation Procedure
Operating Condition
1.
Turn the vehicle to the ON mode.
2.
Slowly press the accelerator pedal to the floor.
With the HDS
None.

Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected, the MIL comes on and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the PCM memory.

Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the 12 volt battery.