Keyless Access System Symptom Troubleshooting - Cannot select ON mode with keyless access and with the keyless remote touching the engine start/stop switch(Without Electric Steering Lock)

ElectronicCircuitSchematics-buttonSystemDescription-buttonKeyless Access System Description - Overview - Refer to: Keyless Access System Description - Components  or Keyless Access System Description - Control/Function  or Keyless Access System Description - System Diagram  or Keyless Access System Description - Overview  or Keyless Access System Description - Failsafe Function  Keyless Access System Description - System Diagram - Refer to: Keyless Access System Description - Components  or Keyless Access System Description - Control/Function  or Keyless Access System Description - System Diagram  or Keyless Access System Description - Overview  or Keyless Access System Description - Failsafe Function  Keyless Access System Description - Control/Function - Refer to: Keyless Access System Description - Components  or Keyless Access System Description - Control/Function  or Keyless Access System Description - System Diagram  or Keyless Access System Description - Overview  or Keyless Access System Description - Failsafe Function  Keyless Access System Description - Components - Refer to: Keyless Access System Description - Components  or Keyless Access System Description - Control/Function  or Keyless Access System Description - System Diagram  or Keyless Access System Description - Overview  or Keyless Access System Description - Failsafe Function  Keyless Access System Description - Failsafe Function - Refer to: Keyless Access System Description - Components  or Keyless Access System Description - Control/Function  or Keyless Access System Description - System Diagram  or Keyless Access System Description - Overview  or Keyless Access System Description - Failsafe Function 

Cannot select ON mode with keyless access and with the keyless remote touching the engine start/stop switch 

1. Keyless access system check 1

   -1. Do this procedure 10 times: Turn the vehicle to the ON mode.

   Does the system change to ON mode?

   YES 

   Intermittent failure, the system is OK at this time. Check for loose or poor connection.

   NO 

   Go to step 2.

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.

   Does the system change to ON mode?

   YES 

   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 

   NO 

   Go to step 3.

3. Keyless access system check 3

   -1. 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 4.

   NO 

   Go to step 10.

4. Keyless access system check 4

   -1. Reboot the HDS.

   -2. Select model on the HDS screen.

   -3. When prompted by the HDS, select YES when asked if the vehicle has keyless access system, then press and hold the engine start/stop button for at least 2 minutes. This selects the forced ON mode.

   Does the system change to forced ON mode?

   YES 

   Go to step 5.

   NO 

   Go to step 15.

5. 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 6.

6. 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 7.

7. 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 8.

8. Keyless access system check 5

   -1. Select KEYLESS TRANSMITTER from the BODY ELECTRICAL system select menu with the HDS, then select INSPECTION, then KEYLESS CHECK.

   -2. Do the KEYLESS CHECK with the HDS using the all keyless remotes.

   Is KEYLESS ENTRY TRANSMITTER CODE IS RECEIVED indicated?

   YES 

   Go to step 9.

   NO 

   Do the keyless access remote registration - Refer to: Keyless Access System Registration (2019)  or Keyless Access System Registration , and recheck.

9. keyless access/TPMS control unit check (substitution)

   -1. Substitute a known-good keyless access/TPMS control unit.

   -2. Do the registration of the keyless access/TPMS control unit according to the instructions on the HDS screen.

   -3. Select REGISTRATION from the ONE-PUSH START system select menu with the HDS, then select REPLACE PCU/BACKUP CONTROL/KEYLESS ACCESS CONTROL UNIT.

   -4. Recheck the system.

   Is the system normal?

   YES 

   Replace the original keyless access/TPMS control unit .

   NO 

   Replace the TCM .

10. L-line check

    -1. Do the DLC circuit troubleshooting .

    Is L-line OK?

    YES 

    Go to step 11.

    NO 

    Repair the L-line wire circuit.

11. Engine start/stop switch operation check

    -1. Do the engine start/stop switch test .

    Is the engine start/stop switch OK?

    YES 

    Go to step 12.

    NO 

    Replace the engine start/stop switch .

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

    -1. Disconnect the following connectors.

    Engine start/stop switch 12P connector

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

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

    Test condition

    Vehicle OFF (LOCK) modeEngine start/stop switch 12P connector: disconnectedKeyless access/TPMS control unit connector B (36P): disconnected

    Test point 1	Engine start/stop switch 12P connector No. 7
    Test point 2	Keyless access/TPMS control unit connector B (36P) No. 10 - Refer to: Keyless Access/TPMS Control Unit Connector for Inputs and Outputs (2022 2023)  or Keyless Access/TPMS Control Unit Connector for Inputs and Outputs

    Test point 1	Engine start/stop switch 12P connector No. 6
    Test point 2	Keyless access/TPMS control unit connector B (36P) No. 11 - Refer to: Keyless Access/TPMS Control Unit Connector for Inputs and Outputs (2022 2023)  or Keyless Access/TPMS Control Unit Connector for Inputs and Outputs

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

    Is there continuity?

    YES 

    The SS1+ and SS2- wires are OK. Go to step 13.

    NO 

    Repair an open or high resistance in the wire.

13. Open wire check (+B SMART line)

    -1. Measure the voltage between test points 1 and 2.

    Test condition	Vehicle OFF (LOCK) modeEngine start/stop switch 10P connector: disconnectedKeyless access/TPMS control unit connector B (36P): disconnected
    Test point 1	Engine start/stop switch 12P connector No. 12
    Test point 2	Body ground

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

    Is there battery voltage?

    YES 

    The +B SMART wire is OK. Go to step 14.

    NO 

    Repair an open or high resistance in the wire. If wire is OK, check the under-dash fuse/relay box No. C3 (7.5 A) fuse circuit.

14. Open wire check (SSB GND line)

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

    Test condition	Vehicle OFF (LOCK) modeEngine start/stop switch 12P connector: disconnectedKeyless access/TPMS control unit connector B (36P): disconnected
    Test point 1	Engine start/stop switch 12P connector No. 1
    Test point 2	Keyless access/TPMS control unit connector B (36P) No. 25 - Refer to: Keyless Access/TPMS Control Unit Connector for Inputs and Outputs (2022 2023)  or Keyless Access/TPMS Control Unit Connector for Inputs and Outputs

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

    Is there continuity?

    YES 

    The SSB GND wire is OK. Go to step 15.

    NO 

    Repair an open or high resistance in the wire.

15. 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 16.

16. Open wire check (IG1 VSA, +B BACKUP, +B SMART lines)

    -1. Disconnect the following connectors.

    Keyless access/TPMS control unit connector A (32P)

    -2. Measure the voltage between test points 1 and 2.

    Test condition	Vehicle OFF (LOCK) modeKeyless access/TPMS control unit connector A (32P): disconnectedKeyless access/TPMS control unit connector B (36P): disconnectedEngine start/stop switch 12P connector: disconnected
    Test point 1	Keyless access/TPMS control unit connector B (36P) No. 34 - Refer to: Keyless Access/TPMS Control Unit Connector for Inputs and Outputs (2022 2023)  or Keyless Access/TPMS Control Unit Connector for Inputs and Outputs
    Test point 2	Body ground

    Test point 1	Keyless access/TPMS control unit connector B (36P) No. 18 - Refer to: Keyless Access/TPMS Control Unit Connector for Inputs and Outputs (2022 2023)  or Keyless Access/TPMS Control Unit Connector for Inputs and Outputs
    Test point 2	Body ground

    Test point 1	Keyless access/TPMS control unit connector A (32P) No. 1 - Refer to: Keyless Access/TPMS Control Unit Connector for Inputs and Outputs (2022 2023)  or Keyless Access/TPMS Control Unit Connector for Inputs and Outputs
    Test point 2	Body ground

    Is there battery voltage?

    YES 

    The IG1 VSA, +B BACKUP, and +B SMART wires are OK. Go to step 17.

    NO 

    Repair an open or high resistance in the wire.

17. Open wire check (SGND line)

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

    Test condition	Vehicle OFF (LOCK) modeKeyless access/TPMS control unit connector A (32P): disconnectedKeyless access/TPMS control unit connector B (36P): disconnectedEngine start/stop switch 10P connector: disconnected
    Test point 1	Keyless access/TPMS control unit connector A (32P) No. 17 - Refer to: Keyless Access/TPMS Control Unit Connector for Inputs and Outputs (2022 2023)  or Keyless Access/TPMS Control Unit Connector for Inputs and Outputs
    Test point 2	Body ground

    Test point 1	Keyless access/TPMS control unit connector B (36P) No. 36 - Refer to: Keyless Access/TPMS Control Unit Connector for Inputs and Outputs (2022 2023)  or Keyless Access/TPMS Control Unit Connector for Inputs and Outputs
    Test point 2	Body ground

    Is there continuity?

    YES 

    The SGND wires are OK. Go to step 18.

    NO 

    Repair an open or high resistance in the ground wire or poor ground (G405).

18. Open wire check (between keyless access/TPMS control unit and TCM lines)

    -1. Disconnect the following connectors.

    TCM 58P connector

    Keyless access/TPMS control unit connector C (20P)

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

    Test condition	Vehicle OFF (LOCK) modeKeyless access/TPMS control unit connector A (32P): disconnectedKeyless access/TPMS control unit connector B (36P): disconnectedKeyless access/TPMS control unit connector C (20P): disconnectedTCM 58P connector: disconnectedEngine start/stop switch 12P connector: disconnected
    Test point 1	Keyless access/TPMS control unit connector C (20P) No. 3 - Refer to: Keyless Access/TPMS Control Unit Connector for Inputs and Outputs (2022 2023)  or Keyless Access/TPMS Control Unit Connector for Inputs and Outputs
    Test point 2	TCM 58P connector No. 56

    Test point 1	Keyless access/TPMS control unit connector B (36P) No. 33 - Refer to: Keyless Access/TPMS Control Unit Connector for Inputs and Outputs (2022 2023)  or Keyless Access/TPMS Control Unit Connector for Inputs and Outputs
    Test point 2	TCM 58P connector No. 9

    Is there continuity?

    YES 

    The IGN TRX and ESL PWR wires are OK. Go to step 19.

    NO 

    Repair an open or high resistance in the wire.

19. Shorted wire check (between TCM and body ground)

    -1. Check for continuity between the following test points and body ground individually.

    Test condition	Vehicle OFF (LOCK) modeKeyless access/TPMS control unit connector A (32P): disconnectedKeyless access/TPMS control unit connector B (36P): disconnectedKeyless access/TPMS control unit connector C (20P): disconnectedTCM 58P connector: disconnectedEngine start/stop switch 12P connector: disconnected
    Test point 1	TCM 58P connector No. 56
    Test point 2	Body ground

    Test point 1	TCM 58P connector No. 9
    Test point 2	Body ground

    Is there continuity?

    YES 

    Repair a short to ground in the wire.

    NO 

    The wires between the TCM and body ground are OK. Go to step 20.

20. Open wire check (+B line)

    -1. Measure the voltage between test points 1 and 2 individually.

    Test condition	Vehicle OFF (LOCK) modeKeyless access/TPMS control unit connector A (32P): disconnectedKeyless access/TPMS control unit connector B (36P): disconnectedKeyless access/TPMS control unit connector C (20P): disconnectedTCM 58P connector: disconnectedEngine start/stop switch 10P connector: disconnected
    Test point 1	TCM 58P connector No. 5
    Test point 2	Body ground

    Is there battery voltage?

    YES 

    The +B wire is OK. Go to step 21.

    NO 

    Repair an open or high resistance in the wire.

21. Open wire check (IG1 line)

    -1. Turn the vehicle to the ON mode.

    -2. Measure the voltage between test points 1 and 2 individually.

    Test condition	Vehicle ON modeKeyless access/TPMS control unit connector A (32P): disconnectedKeyless access/TPMS control unit connector B (36P): disconnectedKeyless access/TPMS control unit connector C (20P): disconnectedTCM 58P connector: disconnectedEngine start/stop switch 12P connector: disconnected
    Test point 1	TCM 58P connector No. 58
    Test point 2	Body ground

    Is there battery voltage?

    YES 

    The IG1 wire is OK. Go to step 22.

    NO 

    Repair an open or high resistance in the wire.

22. Open wire check (GND1, GND2 line)

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

    -2. Check for continuity between test points 1 and 2 individually.

    Test condition	Vehicle OFF modeKeyless access/TPMS control unit connector A (32P): disconnectedKeyless access/TPMS control unit connector B (36P): disconnectedKeyless access/TPMS control unit connector C (20P): disconnectedTCM 58P connector: disconnectedEngine start/stop switch 12P connector: disconnected
    Test point 1	TCM 58P connector No. 1
    Test point 2	Body ground

    Test point 1	TCM 58P connector No. 2
    Test point 2	Body ground

    Is there continuity?

    YES 

    The GND1, GND2 wires are OK. Go to step 23.

    NO 

    Repair an open or high resistance in the wire or poor ground (G101).

23. keyless access/TPMS control unit check (substitution)

    -1. Substitute a known-good keyless access/TPMS control unit.

    -2. Reconnect these items:

    Engine start/stop switch 12P connector

    TCM 58P connector

    Keyless access/TPMS control unit connector A (32P)

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

    Keyless access/TPMS control unit connector C (20P)

    -3. Do the registration of the keyless access/TPMS control unit according to the instructions on the HDS screen.

    -4. Select REGISTRATION from the ONE-PUSH START system select menu with the HDS, then select REPLACE PCU/BACKUP CONTROL/KEYLESS ACCESS CONTROL UNIT.

    -5. Recheck the system.

    Is the system normal?

    YES 

    Replace the original keyless access/TPMS control unit .

    NO 

    Replace the TCM .