Cannot select ON mode with keyless access, but can select ON mode with the keyless remote touching the engine start/stop switch (2018 2019 2020)

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.
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 .

PCU DTC check

-1. Check for PCU DTCs with the HDS.

DTC Description	DTC

Are any DTCs indicated?

YES

Troubleshoot the PCU DTCs.

Go to step 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.

Go to step 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.

Go to step 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.

Go to step 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 12P connector
Keyless 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 12P 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 (GRY)
Test point 2	Engine start/stop switch 12P connector No. 7 (GRY)

Test circuit	SS2 (-)
Test point 1	Keyless access/TPMS control unit connector B (36P) No. 11 (BLU)
Test point 2	Engine start/stop switch 12P connector No. 6 (BLU)

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 .

Repair an open or high resistance in the wire.

Keyless access system check 4
-1. Do the keyless access remote check using the all keyless remotes .

Are the all keyless remotes OK?

YES

Go to step 9.

NO

Replace the keyless remote and recheck.
RF unit check
-1. Substitute a known-good RF unit, then recheck the system.

Does the system change to ON mode?

YES

Replace the original RF unit .

NO

Replace the keyless access/TPMS control unit .