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Home >> Honda >> 2021 >> Clarity Plug-In Hybrid >> Repair and Diagnosis >> Accessories & Equipment >> Anti-Theft Systems >> Security System / Keyless Entry System - Testing & Troubleshooting - (Plug-In) >> Symptom Troubleshooting Index >> Keyless Access System Symptom
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Keyless Access System Symptom

Symptom Diagnostic procedure Also check for
Cannot select ON mode with keyless access and with the keyless remote touching the power switch Symptom troubleshooting 
  • Check the No. B1 , No. B2-3 , No. B3-3 , No. B3-4 , and No. B21 fuses
  • Check the No. D3 fuse
  • Poor connections at the body control module
  • +B P-ACT DRV line open
  • GND line open/short or poor ground
  • SS1(+) line open/short
  • SS2(-)line open/short
  • TCU WAKE UP line open/short
  • IGNTRX line open/short
  • L-line
  • Keyless remote
  • Body control module
  • Harness/connectors
  • Power switch
Cannot select ON mode with keyless access, but can select ON mode with the keyless remote touching the power switch Symptom troubleshooting 
  • Body control module
  • LF antenna
  • Keyless remote
  • RF unit
  • Low or weak keyless remote battery
  • Harness/connectors
Cannot select ON mode with the keyless remote touching the power switch, but can select ON mode with keyless access Check the body control module
  • Body control module is not registered
  • Body control module
  • Not registered
  • IGNTRX line open/short
  • Harness/connectors
The mode changes between ACCESSORY and ON, but it does not change to OFF (LOCK)
  • Check the body control module
  • Check the SBW shifter control module
  • Body control module
  • ATP-P line open
  • SBW shifter control module
The mode changes between ACCESSORY and ON, but it is difficult to change to OFF (LOCK)
  • Check the body control module
  • Check the gauge control module
  • Gauge control module
  • Body control module
  • PCM
  • B-CAN communication line open/short
  • F-CAN communication line open/short
  • Speed signal line open
Power switch does not work Check for DTCs. If any DTC is indicated, go to the DTC troubleshooting
  • ACC relay circuit
  • Body control module
  • Power switch
  • SS1(+) line short
  • SS2(-) line short
  • Harness
Symptom Diagnostic procedure Also check for
Security indicator blinks Symptom troubleshooting 
  • Gauge control module
  • Body control module
  • PCM
  • Harness/connections
All the doors will not lock and unlock Symptom troubleshooting 
  • Body control module
  • LF antenna
  • Driver's door lock knob switch
  • Door outer handle touch sensor/lock switch
  • Door lock actuators
  • Keyless remote
  • Low or weak keyless remote battery
  • Not registered
The doors will not unlock or lock with the keyless remote, but will unlock or lock with the door outer handles Symptom troubleshooting 
  • Keyless remote battery
  • Keyless remote
  • LF antenna
  • Body control module
  • B-CAN communication line
  • Harness/connections
The doors will not unlock or lock with the door outer handle touch sensor or lock switch, but will unlock or lock with the keyless remote Symptom troubleshooting 
  • Door outer handle touch sensor/lock switch
  • Body control module
  • Keyless remote
  • Not registered
  • Harness/connections