INSPECTION PROCEDURE O-1: The security alarm is not armed (the security indicator lamp does not illuminate).


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


COMMENTS ON TROUBLE SYMPTOM
If this function does not work normally, the input signal circuit(s) below, the security indicator, or the ETACS-ECU may be defective. Also, the security alarm function may have been disabled with a customisation function.

  • Keyless entry transmitter
  • Key reminder switch
  • Ignition switch (ACC)

POSSIBLE CAUSES

  • The security indicator is defective.
  • Malfunction of the ETACS-ECU
  • Damaged harness wires and connectors

Step 1. Check the operation of the keyless entry system.
Check that the keyless entry system works normally.

Q. Is the check result normal?
Go to Step 2 .
Refer to inspection procedure E-1 "Keyless entry system does not work ."

Step 2. 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 3 .
Use the SWS monitor customisation function to set "SECURITY ALM" to any setting other than "W/O FUNCTION" (Refer to ).

Step 3. SWS monitor data list
Check the SWS communication input signals, which are related to the security alarm.
<Selected item> ETACS ECU
  • Turn the ignition switch to the ACC position.
Item No.
 Item name
 Normal conditions
Item 31
 IG SW(ACC)
 ON
OK: Normal condition is displayed.

Q. Is the check result normal?
Go to Step 4 .
Refer to inspection procedure P-1 "The ignition switch (ACC) 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.

  • Ignition switch: OFF (key inserted)
Item No.
 Item name
 Normal condition
Item 03
 KEY REMIN SW
 OFF
OK: Normal condition is displayed.

Q. Is the check result normal?
Go to Step 5 .
Refer to inspection procedure P-10 "The key reminder switch signal is not received ."

Step 5. Connector check: C-139 security indicator connector

Q. Is the check result normal?

Go to Step 6 .

Repair the defective connector.

Step 6. Checking the security indicator
Check that the security indicator is normal.

Q. Is the check result normal?
Go to Step 7 .
Replace the security indicator.

Step 7. Voltage measurement at the C-139 security indicator connector.

(1)Disconnect the connector, and measure at the wiring harness side.

(2)Voltage between C-139 security indicator connector No.1 and body earth
OK: System voltage

Q. Is the check result normal?

Go to Step 9 .

Go to Step 8 .

Step 8. Check the wiring harness between C-139 security indicator connector terminal No.1 to fusible link (26).


note Prior to the wiring harness inspection, check intermediate connectors C-125, C-140, joint connector C-31, and repair if necessary.

  • Check the power supply line for open circuit.

Q. Is the check result normal?

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

Repair the wiring harness.

Step 9. Connector check: C-221 ETACS-ECU connector

Q. Is the check result normal?

Go to Step 10 .

Repair the defective connector.

Step 10. Check the wiring harness from C-221 ETACS-ECU connector terminal No.74 to C-139 security indicator connector terminal No.2.



note Prior to the wiring harness inspection, check intermediate connectors C-140, and repair if necessary.

  • Check the input and output lines for open or short circuit.

Q. Is the check result normal?

Go to Step 11 .

Repair the wiring harness.

Step 11. 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.