Without HDS

WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

Start the engine.
- If the engine does not start, go to the immobilizer system troubleshooting (see SYMPTOM TROUBLESHOOTING ).
- If the engine starts, go to step 2.
Press the transmitter lock or unlock button at least 10 times to reset the transmitter.
- If the locks work, the transmitter is OK.
- If the locks don't work, go to step 3.
Remove the transmitter cover (A) from the transmitter (B), and check for water damage.
- If you find any water damage, replace the transmitter and register the new transmitter.
- If there is no water damage, go to step 4.
Fig 1: Locating Transmitter Cover And Transmitter
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Replace the transmitter battery (A) with a new one (CR 1616), 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 do not lock and unlock, go to step 5.
Fig 2: Locating Transmitter Battery
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Reprogram and register the transmitter (see IMMOBILIZER KEY REGISTRATION ), then try to lock and unlock the doors.
- If the doors lock and unlock, the transmitter is OK.
- If the doors do not lock and unlock, substitute a known-good transmitter, register it (see IMMOBILIZER KEY REGISTRATION ) and recheck. If still not operating, replace the immobilizer-keyless control unit (see IMMOBILIZER-KEYLESS CONTROL UNIT REGISTRATION ).