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Home >> Acura >> 2017 >> RLX Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Security System Keyless Entry System - Testing & Troubleshooting (Except Hybrid) >> Symptom Troubleshooting Index >> Keyless Access System Symptom Troubleshooting Index (2018 2019 2020)
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Keyless Access System Symptom Troubleshooting Index (2018 2019 2020)

Symptom Diagnostic procedure Also check for
Cannot select ON mode with keyless access and with the keyless remote touching the engine start/stop switch Symptom troubleshooting
Cannot select ON mode with keyless access, but can select ON mode with the keyless remote touching the engine start/stop switch Symptom troubleshooting
Cannot select ON mode with the keyless remote touching the engine start/stop switch, but can select ON mode with keyless access Check the keyless access/TPMS control unit
  • Keyless access/TPMS control unit is not registered
  • Keyless access/TPMS control unit
  • IGN TRX line open/short
  • Harness/connections
The mode changes between ACCESSORY and ON, but it does not change to OFF
  • Check the keyless access/TPMS control unit
  • Check the TCM
  • Keyless access/TPMS control unit
  • ATP-P line open
  • TCM
The mode changes between ACCESSORY and ON, but it is difficult to change to OFF
  • Check the keyless access/TPMS control unit
  • Check the gauge control module
  • Check the TCM
  • Gauge control module
  • Keyless access/TPMS control unit
  • PCM
  • B-CAN communication line open/short
  • F-CAN communication line open/short
  • Speed signal line open
  • TCM
Engine start/stop switch does not work Check for DTCs. If any DTC is indicated, go to the DTC troubleshooting
  • ACC relay circuit
  • Keyless access/TPMS control unit
  • Engine start/stop switch
  • SS1 (+) line short
  • SS2 (-) line short
  • Harness
Symptom Diagnostic procedure Also check for
Engine does not crank (power supply is normal)
  • Check the brake pedal position switch
  • Check the keyless access/TPMS control unit
  • Keyless access/TPMS control unit
  • STS line open/short
  • Brake pedal position switch
  • STOP SW line open/short
The engine starts, but stalls immediately Symptom troubleshooting
  • No power to PCM
  • No power to MICU
  • Keyless access/TPMS control unit
  • Gauge control module
  • Harness/connections
Keyless access indicator does not go off or does not come on Symptom troubleshooting
  • Gauge control module
  • Keyless access/TPMS control unit
  • Harness/connections
Immobilizer indicator does not go off or does not come on Symptom troubleshooting
  • Gauge control module
  • Keyless access/TPMS control unit
  • PCM
  • Harness/connections
All the doors will not lock and unlock Symptom troubleshooting
  • Keyless access/TPMS control unit
  • 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 dead
  • Keyless remote
  • MICU
  • Keyless access/TPMS control unit
  • Harness/connections
  • B-CAN communication line
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
  • Keyless access/TPMS control unit
  • Keyless remote
  • MICU
  • Not registered
  • Harness/connections