Security System / Keyless Entry System - Service, Testing And Troubleshooting

• System Registration
  • Keyless Access System Registration (KA)
    • Procedure
  • Keyless Access System Registration (KC/KX) (2019)
    • Procedure
• Description & Operation
  • Keyless Access System Description - Components
  • Keyless Access System Description - Control/Function
  • Keyless Access System Description - Failsafe Function
  • Keyless Access System Description - Overview
  • Keyless Access System Description - System Diagram
  • Keyless/Power Door Locks/Security System Description - Components
  • Keyless/Power Door Locks/Security System Description - Control/Function
  • Keyless/Power Door Locks/Security System Description - Overview
  • Keyless/Power Door Locks/Security System Description - System Diagram
• Symptom Troubleshooting
  • Keyless Access System Symptom Troubleshooting - All the doors will not lock and unlock
  • Keyless Access System Symptom Troubleshooting - Cannot select ON mode with keyless access and with the keyless remote touching the engine start/stop switch(With Electric Steering Lock)
  • 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)
  • 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
  • Keyless Access System Symptom Troubleshooting - Immobilizer indicator does not go off or does not come on
  • Keyless Access System Symptom Troubleshooting - Keyless access indicator does not go off or does not come on
  • Keyless Access System Symptom Troubleshooting - Security indicator blinks
  • Keyless Access System Symptom Troubleshooting - 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
  • Keyless Access System Symptom Troubleshooting - The doors will not unlock or lock with the keyless remote, but will unlock or lock with the door outer handles
  • Keyless Access System Symptom Troubleshooting - The engine starts but stalls immediately
  • Keyless Access System Symptom Troubleshooting - The key-in reminder does not sound
  • Keyless Access System Symptom Troubleshooting - The key-in reminder sounds in vehicle OFF mode when door is open
  • Keyless Access System Touch Sensor Circuit Troubleshooting
  • Keyless Buzzer Circuit Troubleshooting
  • Keyless/Power Door Locks/Security System Symptom Troubleshooting - AUTO DOOR UNLOCK does not work
  • Keyless/Power Door Locks/Security System Symptom Troubleshooting - Doors automatically relock 30 seconds after being unlocked with the remote even though a door has been opened
  • Keyless/Power Door Locks/Security System Symptom Troubleshooting - Security alarm system will not arm
  • Keyless/Power Door Locks/Security System Symptom Troubleshooting - The horn does not sound and/or the headlights do not flash when the PANIC button on the remote is pressed
• Connector View
  • HomeLink Unit Connector for Inputs and Outputs
  • Keyless Access/TPMS Control Unit Connector for Inputs and Outputs (2019 2020 2021)
  • Keyless Access/TPMS Control Unit Connector for Inputs and Outputs (2022 2023 2024 2025)
• Check
  • Keyless Access System Check
• Circuit Diagram
  • HomeLink Remote Control System Circuit Diagram
  • Keyless Access System Circuit Diagram
  • Keyless/Power Door Locks/Security System Circuit Diagram
• General Information
  • Keyless Access System Symptom Troubleshooting Information
    • General Check Before Troubleshooting
    • Symptom Troubleshooting Using the Security Indicator Lighting Pattern
      • Notes
      • Normal operation:
      • Immobilizer code is not identified:
      • Security indicator turns on:
    • System Check and Status Log
  • Keyless/Power Door Locks/Security System Tripped Sensor Recall
• Input Test
  • Keyless Access System (Keyless Access Control Unit, Electric Steering Lock, and TPMS Control Unit) Input Test
  • Keyless/Power Door Locks/Security System (MICU, Door Multiplex Control Unit, and Front Passenger's Power Window Switch) Input Test
• Test
  • Door Key Cylinder Switch Test
    • Test
  • Door Lock Actuator Test
    • Test
  • Door Lock Knob Switch Test
    • Test
  • Engine Start/Stop Switch Test
    • Test
  • HomeLink Remote Control System Test
  • Keyless Access LF Antenna Function Test
  • Keyless Access System Status Log
  • Tailgate Outer Handle/Lock Switch Test
    • Test
• Symptom Troubleshooting Index for Viewer
  • All The Doors Will Not Lock And Unlock
  • All The Doors Will Not Lock Or Unlock With Driver's Door Key Cylinder Or Door Lock Switch Or Keyless Remote
  • Auto Door Unlock Does Not Work
  • Cannot Select ON Mode With Keyless Access And 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
  • Cannot Select ON Mode With The Keyless Remote Touching The Engine Start/Stop Switch, But Can Select ON Mode With Keyless Access
  • Doors Automatically Relock 30 Seconds After Being Unlocked With The Remote Even Though A Door Has Been Opened
  • Driver's Door Will Not Lock Or Unlock
  • Engine Does Not Crank (Power Supply Is Normal)
  • Engine Start/Stop Switch Does Not Work
  • Front Passenger's And Right Rear Doors Will Not Lock Or Unlock
  • Left Rear Door Will Not Lock Or Unlock
  • Passenger Doors Will Not Unlock With The Remote Or Key Cylinder Switch, But Will Unlock With The Inside Door Unlock Switch
  • Security Alarm System Will Not Arm
  • Security Indicator Blinks
  • 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
  • The Doors Will Not Unlock Or Lock With The Keyless Remote, But Will Unlock Or Lock With The Door Outer Handles
  • The Engine Starts, But Stalls Immediately
  • The Horn Does Not Sound And/Or The Headlights Do Not Flash When The PANIC Button On The Remote Is Pressed
  • The Key-In Reminder Does Not Sound
  • The Key-In Reminder Sounds In Vehicle OFF Mode When Door Is Open
  • The Mode Changes Between ACC and ON, But It Does Not Change To OFF
  • The Mode Changes Between ACC And ON, But It Is Difficult To Change To OFF
  • The Security System Sounds Randomly While The Doors Are Locked
• Symptom Troubleshooting Index
  • Keyless Access System Symptom Troubleshooting Index
  • Keyless/Power Door Locks/Security System Symptom Troubleshooting Index
• Component Location Index
  • HomeLink Remote Control System Component Location Index
  • Keyless Access System Component Location Index
  • Keyless/Power Door Locks/Security System Component Location Index