[54C] SMART WIRING SYSTEM (SWS) USING SWS MONITOR <Hong Kong spec.> - - SYMPTOM PROCEDURES - KEYLESS ENTRY SYSTEM - INSPECTION PROCEDURE E-1: Keyless entry system does not work.PRINT PAGE / INDEX / PRIOR / NEXT
KEYLESS ENTRY SYSTEM
INSPECTION PROCEDURE E-1: Keyless entry system does not work.
 CAUTION
 Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.
COMMENTS ON TROUBLE SYMPTOM
If the keyless entry system does not work normally, the input signal circuits to the components below or the ETACS-ECU may be defective.
  • Key reminder switch
  • All of the door switches
  • Keyless entry transmitter
  • Driver's door lock actuator
POSSIBLE CAUSES
  • Malfunction of the key reminder switch
  • Malfunction of the door switches
  • Malfunction of the keyless entry transmitter
  • Malfunction of the driver's door lock actuator
  • Malfunction of the ETACS-ECU
  • Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 1. ECU check on the SWS monitor
Check that the power supply and earth lines to the ETACS-ECU and the SWS communication lines are normal.
  • Ignition switch: OFF
ECUS TO BE CHECKED
  • ETACS ECU
OK: "OK" is displayed on the "ETACS ECU" menu.
Q: Is the check result normal?
YES:  Go to Step 2.
NO:  Refer to Inspection Procedure A-3 "Communication with the ETACS-ECU is not possible ."
Step 2. Use the SWS monitor to examine the keyless entry system for signal reception.
Check the condition of the keyless entry transmitter.
Operation switch
 Normal conditions (received signal)
LOCK
 LOCK
UNLOCK
 UNLOCK
OK: By operating the switch as shown in the table above, relevant normal conditions are displayed.
Q: Is the check result normal?
YES:  Go to Step 3.
NO:  Refer to inspection procedure P-16 "Each switch signal of the keyless entry transmitter is not received ."
Step 3. Confirm communication data by using the SWS monitor.
Check the ETACS-ECU signal, which is related to the central door locking system.
<Selected item> ETACS
  • Each door: Closed to open
Item No.
 Item name
 Normal conditions
Item 38
 SECURITY ALRM
 From OFF to ON

OK: Normal condition is displayed.
Q: Is the check result normal?
YES:  Go to Step 4.
NO:  Refer to inspection procedure P-13 "All the door switch signals are not received ."
Step 4. Retest the system.
Check the keyless entry system works normally.
Q: Is the check result normal?
YES:  The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
NO:  Replace the ETACS-ECU.
[54C] SMART WIRING SYSTEM (SWS) USING SWS MONITOR <Hong Kong spec.> - - SYMPTOM PROCEDURES - KEYLESS ENTRY SYSTEM - INSPECTION PROCEDURE E-1: Keyless entry system does not work.PRINT PAGE / INDEX / PRIOR / NEXT
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