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Home › Honda › 2007 › Accord Hybrid › Repair and Diagnosis › Engine Performance › System › Electronic Throttle Control System (Hybrid) › DTC Troubleshooting › DTC P2552: Throttle Actuator Control Module Relay Malfunction

DTC P2552: Throttle Actuator Control Module Relay Malfunction

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).
  1. Turn the ignition switch ON (II).
  2. Clear the DTC with the HDS.
  3. Do the ETCS TEST in the INSPECTION MENU with the HDS.

    Is the RELAY circuit OK? 

    1. YES  - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the throttle actuator control module relay, the throttle actuator control module, and the PCM.
    2. NO  - Go to step 4.
  4. Turn the ignition switch OFF.
  5. Jump the SCS line with the HDS.
  6. Remove the throttle actuator control module relay (A).
    Fig 1: Removing Throttle Actuator Control Module Relay (A)
    G03663705Courtesy of AMERICAN HONDA MOTOR CO., INC.
  7. Disconnect PCM connector E (31P).
  8. Check for continuity between PCM connector terminal E3 and body ground.
    Fig 2: Checking For Continuity Between PCM Connector Terminal E3 And Body Ground
    G03663706Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  - Repair short in the wire between the throttle actuator control module relay and the PCM (E3), then go to step  10.
    2. NO  - Go to step 9.
  9. Test the throttle actuator control module relay (see POWER RELAY TEST ).

    Is the relay OK? 

    1. YES  - Go to step  17.
    2. NO  - Replace the throttle actuator control module relay, then go to step 10.
  10. Reconnect PCM connector E (31P).
  11. Turn the ignition switch ON (II).
  12. Reset the PCM with the HDS.
  13. Do the PCM idle learn procedure (see PCM IDLE LEARN PROCEDURE ).
  14. Turn the ignition switch OFF.
  15. Turn the ignition switch ON (II), and wait 10 seconds.
  16. Check for Temporary DTCs or DTCs with the HDS.

    Are any Temporary DTCs or DTCs indicated? 

    1. YES  - If DTC P2552 is indicated, check for poor connections or loose terminals at the throttle actuator control module relay, the throttle actuator control module, and the PCM, then go to step  1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting.
    2. NO  - Troubleshooting is complete.
  17. Update the PCM if it does not have the latest software, or substitute a known-good PCM (see UPDATING THE PCM ).
  18. Check for Temporary DTCs or DTCs with the HDS.

    Are any Temporary DTCs or DTCs indicated? 

    1. YES  - If DTC P2552 is indicated, check for poor connections or loose terminals at the throttle actuator control module relay, the throttle actuator control module, and the PCM, then go to step  1. 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 ).
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