DTC P2118: Throttle Actuator Current Range/ Performance Problem

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Turn the ignition switch to ON (II).
Clear the DTC with the HDS.
Slowly press the accelerator pedal to the floor.
Check for Temporary DTCs or DTCs with the HDS.
Is DTC P2118 indicated?

YES -Go to step 5.

NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the throttle body and the PCM.
Turn the ignition switch to LOCK (0).
Disconnect the C251 connector (13P) between the PCM subharness and the throttle actuator control module subharness.
Measure the resistance between C251 connector (13P) terminals No. 6 and No. 13.

Fig 1: Measuring Resistance Between C251 Connector (13P) Terminals No. 6 And No. 13
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there about 1.0 Ω or less?

YES -Go to step 8.

NO -Go to step 10.
Disconnect the throttle body 6P connector.
Measure the resistance between throttle body 6P connector terminals No. 5 and No. 6 with the throttle fully closed.

Fig 2: Measuring Resistance Between Throttle Body 6P Connector Terminals No. 5 And No. 6 With Throttle Fully Closed
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there about 1.0 Ω or less?

YES -Go to step 12.

NO -Repair short in the wires between the throttle body and the C251 connector (motor drive lines), then go to step 13.
Disconnect the throttle actuator control module 16P connector (see ACCELERATOR PEDAL MODULE REMOVAL/INSTALLATION ).
Check for continuity between body ground and C251 connector (13P) terminals No. 6 and No. 13 individually.

Fig 3: Checking For Continuity Between Body Ground And C251 Connector (13P) Terminals No. 6 And No. 13 Individually
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Repair short in the wires between the throttle actuator control module and the C251 connector (motor drive lines), then go to step 8.

NO -Go to step 21.
Replace the throttle body (see THROTTLE BODY REMOVAL/INSTALLATION ).
Reconnect all connectors.
Turn the ignition switch to ON (II).
Reset the PCM with the HDS.
Do the PCM idle learn procedure (see PCM IDLE LEARN PROCEDURE ).
Turn the ignition switch to LOCK (0).
Turn the ignition switch to ON (II).
Slowly press the accelerator pedal to the floor.
Check for Temporary DTCs or DTCs with the HDS.
Is DTC P2118 indicated?

YES -Check for poor connections or loose terminals at the throttle body and the throttle actuator control module, then go to step 1.

NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
Reconnect all connectors.
Update the PCM if it does not have the latest software (see PCM UPDATE ), or substitute a known-good PCM (see SUBSTITUTING THE PCM ).
Turn the ignition switch to LOCK (0).
Turn the ignition switch to ON (II).
Slowly press the accelerator pedal to the floor.
Check for Temporary DTCs or DTCs with the HDS.
Is DTC P2118 indicated?

YES -Check for poor connections or loose terminals at the throttle body and the throttle actuator control module. If the PCM was updated, substitute a known-good PCM (see SUBSTITUTING THE PCM ), then recheck. If the PCM was substituted, go to step 1.

NO -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see PCM REPLACEMENT ). If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.