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

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.

   One-Push - KEYLESS ACCESS CONTROL UNIT- SELF CHECK

   Does the system communicate with the HDS?

   YES 

   Go to step 3.

   NO 

   Do the keyless access/TPMS control unit input test - Refer to: Keyless Access System (Keyless Access Control Unit, Electric Steering Lock, and TPMS Control Unit) Input Test (2016),  or Keyless Access System (Keyless Access Control Unit, Electric Steering Lock, and TPMS Control Unit) Input Test (2014 2015),  or Keyless Access System (Keyless Access Control Unit, Electric Steering Lock, and TPMS Control Unit) Input Test (2017 2018 2019 2020) .

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/TPMS control unit DTCs with the HDS.

   DTC Description	DTC

   Are any DTCs indicated?

   YES 

   Troubleshoot the keyless access/TPMS 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.

   One-Push - KEYLESS ACCESS CONTROL UNIT- HISTORY DATA

   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.

   One-Push - KEYLESS ACCESS CONTROL UNIT- HISTORY DATA

   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 connectorKeyless access/TPMS control unit connector B (36P)

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

   Test condition	Vehicle OFF (LOCK) mode Engine start/stop switch 10P connector: disconnected keyless access/TPMS control unit connector B (36P): disconnected
   Test circuit	SS1+
   Test point 1	Keyless access/TPMS control unit connector B (36P) No. 10 (BLK)
   Test point 2	Engine start/stop switch 10P connector No. 4 (BLK)

   Test circuit	SS2-
   Test point 1	Keyless access/TPMS control unit connector B (36P) No. 11 (GRY)
   Test point 2	Engine start/stop switch 10P connector No. 1 (GRY)

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

   Is there continuity?

   YES 

   The SS1+ and SS2- wires are OK. Replace the keyless access/TPMS control unit .

   NO 

   Repair an open or high resistance in the wire.

8. Keyless access system check 4

   -1. Select KEYLESS TRANSMITTER from the BODY ELECTRICAL SYSTEM SELECT menu, then select INSPECTION, then KEYLESS CHECK.

   Inspection - Keyless Check

   Do the KEYLESS CHECK with the HDS using the all keyless remotes.

   Is DIFFERENT KEYLESS ENTRY TRANSMITTER CODE IS RECEIVED indicated?

   YES 

   Go to step 10.

   NO 

   Go to step 9.

9. Keyless remote check (substitution)

   -1. Substitute a known-good keyless remote, then recheck the system.

   Does the system change to ON mode?

   YES 

   Register the keyless remote - Refer to: Keyless Access System Registration (2014 2015),  or Keyless Access System Registration (2016) , and recheck. If the symptom does not go away, replace the keyless remote.

   NO 

   Replace the keyless access/TPMS control unit .

10. Keyless remote check (substitution)

    -1. Substitute a known-good keyless remote, then recheck the system.

    Does the system change to ON mode?

    YES 

    Register the keyless remote - Refer to: Keyless Access System Registration (2014 2015),  or Keyless Access System Registration (2016) , and recheck. If the symptom does not go away, replace the keyless remote.

    NO 

    Go to step 11.

11. 2-way transceiver (substitution)

    -1. Substitute a known-good 2-way transceiver, then recheck the system.

    Does the system change to ON mode?

    YES 

    Replace the original 2-way transceiver .

    NO 

    Replace the keyless access/TPMS control unit .