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HOMESERVICE MANUALSHONDA2002CIVIC SIREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 137 (ELECTRONIC THROTTLE CONTROL SYSTEM)DTC TROUBLESHOOTINGDTC P2118: THROTTLE ACTUATOR CURRENT RANGE/PERFORMANCE PROBLEM
2002 Honda Civic Si

DTC P2118: Throttle Actuator Current Range/Performance Problem

2002 Honda Civic SiSECTION DTC P2118: Throttle Actuator Current Range/Performance Problem
WARNING: This page is about a different car, the 2006 Honda Odyssey and 2005 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.
  1. Jump the SCS line with the HDS.
  2. Disconnect PCM connector C (44P).
  3. Measure resistance between PCM connector terminals C2 and C3.
    Fig 1: Measuring Resistance Between PCM Connector Terminals C2 And C3
    G03704421Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 1.0 Ω or less? 

    1. YES  - Go to step  4.
    2. NO  - Go to step  15.
  4. Disconnect the throttle body 6P connector.
  5. At the throttle body side, measure 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 6 With Throttle Fully Closed
    G03704422Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 1.0 Ω or less? 

    1. YES  - Go to step  6.
    2. NO  - Repair short in the wires between the throttle body and PCM (C2, C3), then go to step  7.
  6. Replace the throttle body (see PCM REPLACEMENT ).
  7. Reconnect all connectors.
  8. Turn the ignition switch ON (II).
  9. Reset the PCM with the HDS.
  10. Do the PCM idle learn procedure (see PCM IDLE LEARN PROCEDURE ).
  11. Turn the ignition switch OFF.
  12. Turn the ignition switch ON (II).
  13. Slowly press the accelerator pedal to the floor.
  14. Check for Temporary DTCs or DTCs with the HDS.

    Are any Temporary DTCs or DTCs indicated? 

    1. YES  - If DTC P2118 is indicated, check for poor connections or loose terminals at the throttle body and the PCM, then go to step  16. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting.
    2. NO  - Troubleshooting is complete.
  15. Update the PCM if it does not have the latest software, or substitute a known-good PCM (see PCM UPDATING AND SUBSTITUTION FOR TESTING ).
  16. Check for Temporary DTCs or DTCs with the HDS.

    Are any Temporary DTCs or DTCs indicated? 

    1. YES  - If DTC P2118 is indicated, check for poor connections or loose terminals at the throttle body and the PCM, then go to step  16. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting.
    2. NO  - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see PCM REPLACEMENT ).
RENDER: 1.0x

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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