Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSHONDA2008ODYSSEY EXREPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMEDOOR LOCKSKEYLESS/POWER DOOR LOCKS/SECURITY SYSTEMTRANSMITTER TESTWITHOUT HDS

2008 Honda Odyssey EX

Without HDS

2008 Honda Odyssey EXSECTION Without HDS

Press the lock or unlock button five or six times to reset the transmitter.
- If the locks work, the transmitter is OK.
- If the locks don't work, go to step 2.
Open the transmitter and check for water damage.
- If you find any water damage, replace the transmitter.
- If there is no water damage, go to step 3.
Replace the transmitter battery (A) with a new one, and try to lock and unlock the doors with the transmitter by. pressing the lock or unlock button five or six times.
- If the doors lock and unlock, the transmitter is OK.
- If the doors don't lock and unlock, go to step 4.
  
  Fig 1: Identifying Transmitter Battery
  Courtesy of AMERICAN HONDA MOTOR CO., INC.
Reprogram the transmitter ( KEYLESS TRANSMITTER PROGRAMMING/DELETING - MANUAL METHOD ), then try to lock and unlock the doors.
- If the doors lock and unlock, the transmitter is OK.
- If the doors don't lock and unlock, try and program to another vehicle.
  - If the transmitter programs to another vehicle, go to B-CAN System Diagnosis Test Mode A ( TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).
  - If the transmitter will not program to another vehicle, replace the transmitter.

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When to See a Mechanic

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

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.