Bypassing a 2003-2005 Honda Civic Hybrid IMA battery without removing it.


Opening the lid
O1. Open the hood. HCH I
O2. Disconnect the 12V battery. HCH I
O3. You will need to remove the rear seat. HCH I
O4. Locate and remove the 10mm bolt at the center passenger's left hip. 2004-2005 Civic's have a second bolt at the right hip. HCH I
O5. Pull up on the front edge of the lower cushion. Remove the cushion from the car. HCH I
O6. Remove the two bolts at the lower corners of the seatback. HCH I
O7. Slide the seatback toward the ceiling and remove it from the car. HCH I
O8. Open the hatch and turn off the switch. Reinstall the red safety guard. HCH I
O9. Remove the Torx T-30 bolts. HCH I
O10. Remove the little black clip next to the switch. HCH I
O11. Remove the cover. HCH I

Bypassing the computer
E1. Find these connectors on the bottom of the computer. HCH I
E2. Unplug this plug. HCH I

Closing the cover
C1. Put the cover back on. Make sure to get the tabs in the holes when reinstalling the cover. HCH I
C2. Install the Torx T-30 bolts. The cover must form an airtight seal, so all the bolts must be installed. HCH I
C3. Install the little black clip next to the switch. HCH I
C4. Leave the switch turned off. Then close the hatch. HCH I
C5. Slide the seatbelt tongues all the way up to the top of the belts. Reinstall the seatback. You may have to press toward the back of the car to engage the three hooks into their holes. Then slide the seatback down toward the floor until it is in place. HCH I
C6. Install the two bolts at the lower corners of the seatback. HCH I
C7. Install the lower cushion taking care to get the seat belt buckles above the seat. Press down until they click to lock them in place. HCH I
C8. Reinstall the one or two (depends on year) 10mm bolts that hold the seat cushion in place. HCH I
C9. Start your car (you may have to hold the key for a few seconds) and pay attention to the little red battery light on the dashboard. It should go out when you raise the idle to 1500 or more. If not, turn off the car wait a few seconds and try again. If it still doesn't go out, contact us.
C10. At idle, your car does not produce enough power to charge your 12V battery. There is a reserve, so you just need to avoid leaving it at idle for a long time. If you are stuck at a train crossing, turn the car off.
Above 3800 rpm, your IMA system will overload and shut down for 30-45 seconds (and the light will come on). This happens at about 75mph. Try to avoid this.