Keyless Access System Symptom Troubleshooting - Cannot select ON mode with keyless access, but can select ON mode with the keyless remote touching the engine start/stop switch (2025)

Cannot select ON mode with keyless access, but can select ON mode with the keyless remote touching the engine start/stop switch 

1. Keyless access system check 1

   -1. Push the LOCK and the UNLOCK buttons of the keyless remote, and check if the LED on the keyless remote comes on.

   Does the LED come on?

   YES 

   Go to step 2.

   NO 

   Replace the keyless remote battery and recheck the system. If the symptom does not go away, replace the keyless remote.

2. Keyless access system check 2

   -1. Touch the engine start/stop switch with the keyless remote. The buttons on the keyless remote should be facing you.

   -2. Turn the vehicle to the ON mode.

   -3. Select KEYLESS ACCESS CONTROL UNIT from the ONE-PUSH START system select menu with the HDS, and enter SELF CHECK.

   SELF CHECK

   Does the system communicate with the HDS?

   YES 

   Go to step 3.

   NO 

   Do the body control module input test - Refer to: BODY CONTROL MODULE CONNECTOR FOR INPUTS AND OUTPUTS .

3. PCU DTC check

   -1. Check for PCU DTCs with the HDS.

   DTC Description	DTC

   Are any DTCs indicated?

   YES 

   Troubleshoot the PCU DTCs.

   NO 

   Go to step 4.

4. Keyless access DTC check

   -1. Check for keyless access control unit DTCs with the HDS.

   DTC Description	DTC

   Are any DTCs indicated?

   YES 

   Troubleshoot the keyless access control unit DTCs.

   NO 

   Go to step 5.

5. Backup DTC check

   -1. Check for backup control unit DTCs with the HDS.

   DTC Description	DTC

   Are any DTCs indicated?

   YES 

   Troubleshoot the backup control unit DTCs.

   NO 

   Go to step 6.

6. Keyless access system check 3

   -1. Select HISTORY DATA from the KEYLESS ACCESS CONTROL UNIT mode menu with the HDS.

   Histry data/Clear

   Select HISTORY CLEAR, and back to TEST MODE MENU.

   -3. Turn the vehicle to the OFF (LOCK) mode.

   -4. Touch the engine start/stop switch with the keyless remote. The buttons on the keyless remote should be facing you.

   -5. Turn the vehicle to the ON mode.

   -6. Select HISTORY DATA from the KEYLESS ACCESS CONTROL UNIT mode menu with the HDS.

   Histry data/Clear

   History Data 

   ENGINE START/STOP SWITCH 1 (+)	ON
   ENGINE START/STOP SWITCH 2 (-)	ON

   Is all the information ON?

   YES 

   Go to step 8.

   NO 

   Go to step 7.

7. Open wire check (SS1(+), SS2(-) lines)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Disconnect the following connectors.

   Engine start/stop switch 10P connectorBody control module connector C (66P)

   -3. Check for continuity between test points 1 and 2 respectively.

   Test condition

   Vehicle OFF (LOCK) mode Engine start/stop switch 10P connector: disconnectedBody control module connector C (66P): disconnected

   Test point 1

   Body control module connector C (66P) No. 65 - Refer to: BODY CONTROL MODULE CONNECTOR FOR INPUTS AND OUTPUTS

   Test point 2

   Engine start/stop switch 10P connector (female terminals) No. 6:

   Test point 1

   Body control module connector C (66P) No. 66 - Refer to: BODY CONTROL MODULE CONNECTOR FOR INPUTS AND OUTPUTS

   Test point 2

   Engine start/stop switch 10P connector (female terminals) No. 10:

   Courtesy of HONDA, U.S.A., INC.

   Is there 1.0 Ohm or less?

   YES 

   The SS1(+) and SS2(-) wires are OK. Replace the body control module BODY CONTROL MODULE REMOVAL AND INSTALLATION .

   NO 

   Repair an open or high resistance in the wire.

8. Keyless access system check 4

   -1. Do the keyless access remote check using the all keyless remotes KEYLESS ACCESS REMOTE REMOVAL, INSTALLATION, AND TEST .

   Are the all keyless remotes OK?

   YES 

   Replace the body control module BODY CONTROL MODULE REMOVAL AND INSTALLATION .

   NO 

   Replace the keyless remote KEYLESS ACCESS REMOTE REMOVAL, INSTALLATION, AND TEST and recheck.