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. Check the operation of the central door locking system.
Check that the central door locking system works normally.

Q. Is the check result normal?
Go to Step 2
Refer to Inspection Procedure C-1 "Central door locking system does not work ."

Step 2. ECU check by using 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?
Go to Step 3.
Refer to Inspection Procedure A-3 "Communication with ETACS-ECU is not possible ."

Step 3. 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. Are normal condition displayed?
Go to Step 4.
Refer to Inspection Procedure P-21 "Each switch signal of the keyless entry transmitter is not received ."

Step 4. SWS monitor data list.
Check the SWS communication input signal, which are related to the keyless entry system.
<Selected item> ETACS
  • Driver’s door: Lock → Unlock
Item No.
 Item name
 Normal condition
Item 32
 DR DOR SW
 from OFF to ON
OK: Normal condition is displayed.

Q. Is normal condition displayed?
Go to Step 5.
Refer to inspection procedure P-5 "The driver’s door switch signal is not received <LH drive vehicles> or <RH drive vehicles> ."

Step 5. ETACS switch data by using the SWS monitor.
Check the ETACS-ECU signal related to the keyless entry system.

  • Ignition switch: OFF (key inserted)
  • Doors other than the driver's door (including the tailgate): Closed to open
Item No.
 Item name
 Normal condition
Item 03
 KEY REMINSW
 OFF
Item 05
 PASS DOORSW
 from OFF to ON
Item 07
 TRK LID LASW
 from OFF to ON
Item 41
 R.DOOR (RH) SW
 from OFF to ON
Item 42
 R.DOOR (LH) SW
 from OFF to ON
OK: Normal conditions are displayed for all the items.

Q. Are the check result normal?
Normal conditions displayed for all the items : Go to Step 6.
Normal condition is not displayed for item No.03. : Refer to inspection procedure P-10 "The key reminder switch signal is not received ."
Normal condition is not displayed for item 05, 07, 41 or 42. : Refer to inspection procedure P-12 "All the door switch signals are not received ."

Step 6. Retest the system.
Check the keyless entry system works normally.

Q. Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
Replace the ETACS-ECU.