ECM/PCM Replacement

Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.

Fig 1: Connecting HDS To Data Link Connector (DLC) Located Under Driver's Side Of Dashboard
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Make sure the HDS communicates with the ECM/PCM. If it doesn't, skip steps 3 and 5 and clean the throttle body after this procedure.
Turn the ignition switch ON (II).
Select the INSPECTION MENU with the HDS.
Do the TP POSITION CHECK in the ETCS TEST with the HDS.
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Remove the passenger's dashboard under cover (see PASSENGER'S DASHBOARD UNDER COVER REMOVAL/INSTALLATION ), and the glove box (see GLOVE BOX REMOVAL/INSTALLATION ).
Cut the plastic cross brace in the glove box opening with diagonal cutters in the area shown. Remove and discard the plastic cross brace (A).

Fig 2: Removing Plastic Cross Brace
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Remove the relay holders (B) from the grove box frame.
Remove the gray 20P ECM/PCM wire harness connector (A) from the ECM/PCM mounting bracket (B). Remove the ECM/PCM mounting bolt (C) and the bracket.

Fig 3: Removing ECM/PCM Mounting Bolt And Bracket With Torque Specifications
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Remove the nuts (D), then remove the ECM/PCM (E).
Install the ECM/PCM in the reverse order of removal.
Open the SCS with the HDS.
Turn the ignition switch ON (II).
NOTE: DTC P0630 "VIN Not Programmed or Mismatch" may be stored because the VIN has not been programmed into the ECM/PCM; ignore it, and continue this procedure.
Input the VIN to the ECM/PCM with the HDS.
Rewrite the immobilizer code with the ECM/PCM replacement procedure in the HDS; it allows you to start the engine.
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see ECM/PCM IDLE LEARN PROCEDURE ).
Do the CKP pattern clear/CKP pattern learn procedure (see CKP PATTERN CLEAR/CKP PATTERN LEARN ).