INSPECTION PROCEDURE O-2: The interior alarm does not work normally while the security alarm is triggered.


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


COMMENTS ON TROUBLE SYMPTOM
If the interior alarm does not work normally, the input signal circuits to the components below or the ETACS-ECU may be defective. Also, the security alarm function may have been disabled with a customisation function.

  • Hood switch
  • All of the door switches

POSSIBLE CAUSES

  • The hood switch is defective.
  • All the door switches are defective.
  • Malfunction of the ETACS-ECU
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

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

  • Horn and hazard
  • Hazard only

Q. Is the check result normal?
Go to Step 2 .
Use the SWS monitor customisation function to set "SECURITY ALM" to any setting other than "W/O FUNCTION" (Refer to ).

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
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 the ETACS-ECU is not possible ."

Step 3. SWS monitor data list
Check the SWS communication input signals, which are related to the security alarm.
<Selected item> ETACS ECU
  • Driver’s door: Lock → Unlock
Item No.
 Item name
 Normal conditions
Item 32
 DR DOR SW
 from OFF to ON
OK: Normal condition is displayed.

Q. Is the check result normal?
Go to Step 4 .
Refer to inspection procedure P-4 "The driver’s door switch signal is not received ."

Step 4. ETACS switch data by using the SWS monitor
Check the ETACS-ECU signals, which are related to the security alarm.

  • Doors other than the driver’s door: Closed to open
  • Hood: open
Item No.
 Item name
 Normal conditions
Item 05
 PASS DOORSW
 from OFF to ON
Item 13
 HOOD SW
 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 are displayed for all the items : Go to Step 5 .
Normal condition is not displayed for item No.05, No.41 or No.42 : Refer to inspection procedure P-12 "All the door switch signals are not received ."
Normal condition is not displayed for item No.13 : Refer to Inspection Procedure P-19 "The hood switch signal is not received ."

Step 5. Retest the system.
Check that the security alarm 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.