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 customization 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. Check the power supply circuit.
When the ignition switch is turned to the LOCK (OFF) position, check if the hazard warning lamps illuminate.

Q. Is the check result normal?
Go to Step 2.
Refer to Inspection Procedure A-2 "When the ignition switch is at the LOCK (OFF) position, the functions do not work normally. Check the battery power supply circuit to the ETACS-ECU ."

Step 2. Pulse check
Check the input signals, which are related to the security alarm.
System switch
 Check condition
Driver’s door switch
 When the driver’s door is opened
All of the door switches
 A door is opened when all the doors are closed
Tailgate switch
 A tailgate opened
Hood switch
 A hood opened
OK: The M.U.T.-III sounds or the voltmeter needle fluctuates.

Q. Are the check result normal?
All the signals are received normally. : Go to Step 3.
The driver’s door switch signal is not received. : Refer to Inspection Procedure P-4 "The driver’s door switch signal is not received ."
All the door switch signals are not received. : Refer to Inspection Procedure P-12 "All the door switch signals are not received ."
Tailgate switch signals are not received. : Refer to Inspection Procedure P-12 "All the door switch signals are not received ."
Hood switch signals are not received. : Refer to Inspection Procedure P-19 "Hood switch signals are not received ."

Step 3. Customize function by using the SWS monitor.
Use the SWS monitor customization function to confirm that "SECURITY ALM" is set to other than "W/O FUNCTION" (one of the settings below).

  • Horn and hazard
  • Hazard only
caution The SWS monitor must be used in order to confirm and change that setting. Use the SWS monitor to confirm and/or change the customized function.

Q. Is the check result normal?
Go to Step 4 .
Use the SWS monitor customisation function to set "SECURITY ALM" to any setting other than "W/O FUNCTION" (Refer to ).

Step 4. 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.