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 HOW TO USE THE HDS (HONDA DIAGNOSTIC SYSTEM) ).

Jump the SCS line with the HDS.
Disconnect PCM connector C (49P).
Measure the resistance between PCM connector terminals C2 and C3.

Fig 1: Identifying Resistance Between PCM Connector Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there about 1.0 Ω, or less?

YES - Go to step 4.

NO - Go to step 15.
Disconnect the throttle body 6P connector.
At the throttle body side, measure the resistance between throttle body 6P connector terminals No. 5 and No. 6 with the throttle fully closed.

Fig 2: Identifying Resistance Between Throttle Body 6P Connector Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there about 1.0 Ω or less?

YES - Go to step 6.

NO - Repair short in the wires between PCM connector terminals C2 (ETCSM+ line) and C3 (ETCSM- line), then go to step 7.
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 PCM, 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 PCM. If the PCM was updated, substitute a known-good PCM (see SUBSTITUTING THE PCM ), then go to step 17. 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 .