INSPECTION PROCEDURE B-3: Door-ajar warning buzzer function does not work.


caution Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.


COMMENTS ON TROUBLE SYMPTOM
The ETACS-ECU operates this function in accordance with the input signals below.

  • Ignition switch (IG1)
  • All of the door switches
  • Vehicle speed signal
If this function does not work normally, these input signal circuit(s) or the ETACS-ECU may be defective. Note that this function can be disabled/enabled by the customize function (default setting; enabled). In order to change the setting, the SWS monitor is required.

POSSIBLE CAUSES

  • Malfunction of the door switches
  • Malfunction of the ETACS-ECU
  • Damaged harness wires and connectors

DIAGNOSTIC PROCEDURE

Step 1. Customize function by using the SWS monitor
Use the SWS monitor customisation function to confirm that "DOOR WARN BUZ" is set to other than "W/O FUNCTION" (one of the settings below).

  • W.FUNCTION
  • CONTIN ACTION

Q. Is the check result normal?
GO to Step 2.
Set "DOOR WARN BUZ" to other than "W/O FUNCTION" by using the SWS monitor customisation function (Refer to Customize adjustment ).

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: ON
ECU 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. SWS monitor data list
Check the SWS communication signal, which is related to the door-ajar warning buzzer function.
<Selected item> ETACS
  • Ignition switch: ON
  • Driver’s door: Open
Item No.
 Item name
 Normal condition
Item 30
 Ignition SW(IG1)
 ON
Item 32
 DR DOOR SW
 ON
Item 43
 BUZZER
 ON
OK: Normal conditions are displayed for all the items.

Q. Are the check result normal?
Normal conditions are displayed for all the items : Go to Step 4.
Normal condition is not displayed for item No.30. : Refer to inspection procedure P-2 "The ignition switch (IG1) signal is not received ."
Normal condition is not displayed for item No.32. : Refer to inspection procedure P-5 "The driver’s door switch signal is not received <LH drive vehicles> or <RH drive vehicles> ."
Normal condition is not displayed for item No.43. : Replace the ETACS-ECU.

Step 4. ETACS switch data by using the SWS monitor
Check the ETACS-ECU input signal related to the door-ajar warning buzzer function.

  • Doors other than the driver’s door (including the tailgate): Closed to open
Item No.
 Item name
 Normal condition
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?
Go to Step 5.
Refer to inspection procedure P-12 "All the door switch signals are not received ."

Step 5. ETACS ANALOG data by using the SWS monitor.
Check the ETACS-ECU signal related to the door-ajar warning buzzer function.

  • Set the simulated vehicle speed at approximately 10km/h.
Item No.
 Item name
 Normal condition
Item 03
 SPEED SENSOR
 8 - 10km/h
OK: Normal condition is displayed.

Q. Is the check result normal?
Go to Step 6.
Refer to inspection procedure P-23 "The vehicle speed signal is not received ."

Step 6. Retest the system.
Check that the door-ajar warning buzzer function 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