DTC Advanced Diagnostics: P2118 (3.0L Engine)

DTC P2118: Throttle Actuator Current Range/Performance Problem

General Description

Courtesy of HONDA, U.S.A., INC.

Courtesy of HONDA, U.S.A., INC.

The diagnosis related to the electric throttle control system is done during the vehicle ON mode and OFF (LOCK) mode. The powertrain control module (PCM) opens and closes the throttle actuator to monitor the performance of the throttle body. If any of the following condition is detected, the PCM detects a malfunction and stores a DTC.

Throttle actuator output duty failure
The throttle actuator output duty is out of a specified range.
Throttle actuator power supply failure
The throttle actuator power supply voltage is a specified voltage.
Electric throttle control driver IC failure
The throttle actuator current is a specified current.

Monitor Execution, Sequence, Duration, DTC Type

Execution	Continuous
Sequence	None
Duration	5.0 seconds or more, 500 milliseconds or more*
DTC Type	One drive cycle, MIL on

*: Throttle actuator output duty failure**: Throttle actuator power supply failure and electric throttle control driver IC failure

Enable Conditions

Condition	Minimum	Maximum
12 volt battery voltage [Battery]	6.0 V	-
Other*	Not during throttle valve fully closed position learning

[ ]: HDS Parameter

Malfunction Threshold

Any of the following condition occurs:

Throttle actuator output duty failure
The throttle actuator output duty is more than +/- 100 % for at least 5.0 seconds.
Throttle actuator power supply failure
The throttle actuator power supply voltage is less than 5.0 V for at least 500 milliseconds.
Electric throttle control driver IC failure
The throttle actuator current is more than 8 A for at least 500 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.

Throttle actuator MTR2 line short to power
Throttle actuator MTR1 line short to power
Throttle actuator MTR2 line short to ground
Throttle actuator MTR1 line short to ground
Throttle body failure
PCM internal circuit failure

Diagnosis Details

Conditions for setting the DTC

When a malfunction is detected, the MIL comes on and a Pending DTC, a Confirmed DTC, the freeze data, and the on-board snapshot 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, the freeze data, and the on-board snapshot can be cleared with the scan tool clear command.