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 Pending or Confirmed 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 ECM/PCM.
Turn the ignition switch to LOCK (0).
Jump the SCS line with the HDS.
Disconnect the throttle body 6P connector.
Disconnect ECM/PCM connector C (49P).
Check for continuity between ECM/PCM connector terminal C43 and throttle body 6P connector terminal No. 4.

Fig 1: Checking Continuity Between ECM/PCM Connector Terminal C43 And Throttle Body 6P Connector Terminal No. 4
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Go to step 10.

NO -Repair open in the wire between the throttle body and the ECM/PCM (C43), then go to step 16.
Check for continuity between throttle body 6P connector terminals No. 5 and No. 6.

Fig 2: Checking Continuity Between Throttle Body 6P Connector Terminals No. 5 And No. 6
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Repair short in the wires between throttle body 6P connector terminals No. 5 (ETCS- line) and No. 6 (ETCS+ line), then go to step 16.

NO -Go to step 11.
Check for continuity between body ground and throttle body 6P connector terminals No. 5 and No. 6 individually.

Fig 3: Checking Continuity Between Body Ground And Throttle Body 6P Connector Terminals No. 5 And No. 6
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Repair short in the wire between the throttle body 6P connector and body ground, then go to step 16.

NO -Go to step 12.
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 4: 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 13.

NO -Go to step 15.
At the throttle body side, check for continuity between body ground and throttle body 6P connector terminals No. 5 and No. 6 individually.

Fig 5: Checking For Continuity Between Body Ground And Throttle Body 6P Connector Terminals No. 5 And No. 6
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Go to step 14.

NO -Go to step 23
Replace the throttle body (see THROTTLE BODY REMOVAL/INSTALLATION ).
Reconnect all connectors.
Turn the ignition switch to ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see ECM/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 Pending or Confirmed DTCs with the HDS.
Is DTC P2118 indicated?

YES -Check for poor connections or loose terminals at the throttle body and the ECM/PCM, then go to step 1.

NO -Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting. ■
Reconnect all connectors.
Update the ECM/PCM if it does not have the latest software (see ECM/PCM UPDATE ), or substitute a known-good ECM/PCM (see SUBSTITUTING THE ECM/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 Pending or Confirmed DTCs with the HDS.

Is DTCP2118 indicated?

YES -Check for poor connections or loose terminals at the throttle body and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see SUBSTITUTING THE ECM/PCM ), then go to step 25. If the ECM/PCM was substituted, go to step 1.

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