Keyless Access System Symptom Troubleshooting Index

NOTE:

Before troubleshooting the keyless access system, make sure the fuses associated with the system is OK.

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 - Refer to: Keyless Access System Symptom Troubleshooting - Cannot select ON mode with keyless access and with the keyless remote touching the engine start/stop switch or Keyless Access System Symptom Troubleshooting - All the doors will not lock and unlock or Keyless Access System Symptom Troubleshooting - Immobilizer/security indicator blinks or Keyless Access System Symptom Troubleshooting - The engine starts but stalls immediately or 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 or 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	Poor connections at the body control module Keyless remote Body control module Engine start/stop switch Harness/connections
Cannot select ON mode with keyless access, but can select ON mode with the keyless remote touching the engine start/stop switch	Symptom troubleshooting - Refer to: Keyless Access System Symptom Troubleshooting - Cannot select ON mode with keyless access and with the keyless remote touching the engine start/stop switch or Keyless Access System Symptom Troubleshooting - All the doors will not lock and unlock or Keyless Access System Symptom Troubleshooting - Immobilizer/security indicator blinks or Keyless Access System Symptom Troubleshooting - The engine starts but stalls immediately or 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 or 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	Body control module LF antenna Keyless remote Low or weak keyless remote battery Harness/connections
The mode changes between ACC and ON, but it does not change to OFF (LOCK)	Check the body control module Check the TCM	Body control module ATP-P line open TCM
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 Check the TCM	Body control module Gauge control module 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 Body control module Engine start/stop switch SS1(+) line short SS2(-) line short Harness/connections
Engine does not crank (power supply is normal)	Check the brake pedal position switch Check the body control module	Body control module STS line open/short Brake pedal position switch BRK_DIAG line open/short
The engine starts, but stalls immediately	Symptom troubleshooting - Refer to: Keyless Access System Symptom Troubleshooting - Cannot select ON mode with keyless access and with the keyless remote touching the engine start/stop switch or Keyless Access System Symptom Troubleshooting - All the doors will not lock and unlock or Keyless Access System Symptom Troubleshooting - Immobilizer/security indicator blinks or Keyless Access System Symptom Troubleshooting - The engine starts but stalls immediately or 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 or 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	No power to PCM No power to body control module Body control module Gauge control module Harness/connections

Symptom	Diagnostic procedure	Also check for
Immobilizer/security indicator blinks	Symptom troubleshooting - Refer to: Keyless Access System Symptom Troubleshooting - Cannot select ON mode with keyless access and with the keyless remote touching the engine start/stop switch or Keyless Access System Symptom Troubleshooting - All the doors will not lock and unlock or Keyless Access System Symptom Troubleshooting - Immobilizer/security indicator blinks or Keyless Access System Symptom Troubleshooting - The engine starts but stalls immediately or 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 or 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	Gauge control module Body control module PCM Harness/connections
All the doors will not lock and unlock	Symptom troubleshooting - Refer to: Keyless Access System Symptom Troubleshooting - Cannot select ON mode with keyless access and with the keyless remote touching the engine start/stop switch or Keyless Access System Symptom Troubleshooting - All the doors will not lock and unlock or Keyless Access System Symptom Troubleshooting - Immobilizer/security indicator blinks or Keyless Access System Symptom Troubleshooting - The engine starts but stalls immediately or 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 or 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	Body control module LF antenna Driver's door lock knob switch Door outer handle touch sensors 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 - Refer to: Keyless Access System Symptom Troubleshooting - Cannot select ON mode with keyless access and with the keyless remote touching the engine start/stop switch or Keyless Access System Symptom Troubleshooting - All the doors will not lock and unlock or Keyless Access System Symptom Troubleshooting - Immobilizer/security indicator blinks or Keyless Access System Symptom Troubleshooting - The engine starts but stalls immediately or 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 or 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 remote battery dead Keyless remote Body control module Harness/connections B-CAN communication line