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.

Hood switch

All of the door switches

Alternatively, it is possible that "SECURITY ALM" was set to "W/O FUNCTION" by using the adjustment function.

POSSIBLE CAUSES

Malfunction of the hood switch

All the door switches are defective.

Malfunction of the ETACS-ECU

Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. Check the adjustment function.

Check that "SECURITY ALM" is set to "HORN/HAZARD" or "HAZARD" by using the adjustment function.

Q: Is the check result normal?

YES: Go to Step 2

.
NO: Set "SECURITY ALM" to "HORN/HAZARD" or "HAZARD" by using the adjustment function.(Refer to

Step 2. 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 3

.
NO: Refer to Inspection Procedure A-3 "Communication with the ETACS-ECU is not possible

Step 3. Confirm communication data by using the SWS monitor.

Check the ETACS-ECU signal which are related to the security alarm.

<Selected item> ETACS ECU

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. Check the ETACS SW data by using the SWS monitor.

Check the ETACS-ECU signal from the hood switch.

Hood: open

Item No.	Item name	Normal conditions
Item 13	HOOD SW	ON

OK: Normal condition is displayed.

Q: Is the check result normal?

YES: Go to Step 5

.
NO: Refer to inspection procedure P-20 "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?

YES: The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction

).
NO: Replace the ETACS-ECU.