INSPECTION PROCEDURE O-1: The security alarm is not armed (the security alarm 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 the security alarm does not work normally, the input signal circuits to the components below and security alarm indicator lamp or the ETACS-ECU may be defective.

Keyless entry transmitter

Key reminder switch

Ignition switch (ACC)

In addition, it is possible that the security alarm function has been disabled by using the adjustment function.

POSSIBLE CAUSES

Malfunction of the security alarm indicator lamp

Malfunction of the keyless entry transmitter

Malfunction of the key reminder switch

Malfunction of the ETACS-ECU

Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. Check the adjustment function.

Check that the security alarm function has been enabled by using the adjustment function.

Q: Is the check result normal?

YES: Go to Step 2

.
NO: Enable the security alarm function using the adjustment function. (Refer to

Step 2. Check the keyless entry system.

Check that the keyless entry system works normally.

Q: Is the check result normal?

YES: Go to Step 3

.
NO: Refer to inspection procedure E-1 "Keyless entry system does not work

Step 3. Pulse check

Check the input signals which are related to the security alarm.

System switch	Check conditions
Ignition switch (ACC)	When turned from the LOCK (OFF) position to the ACC position
Key reminder switch	When the inserted ignition key is pulled out
Keyless entry transmitter switch	When the switch is turned from off to on

OK: The MUT-II/III sounds or the voltmeter needle fluctuates.

Q: Are the check result normal?

All the signals are received normally.: Go to Step 4

.
The ignition switch (ACC) signal is not received.: Refer to Inspection Procedure P-1 "The ignition switch (ACC) signal is not received."

.
The key reminder switch signal is not received.: Refer to inspection procedure P-10 "The key reminder switch signal is not received

."
The keyless entry transmitter switch signal is not received.: Refer to Inspection Procedure P-16 "Each switch signal of the keyless entry transmitter is not received

Step 4. Connector check: C-122 security alarm indicator lamp connector

Q: Is the check result normal?

YES: Go to Step 5

.
NO: Repair the defective connector.

Step 5. Check the security alarm indicator lamp.

Check that the security alarm indicator lamp illuminates.

Q: Is the check result normal?

YES: Go to Step 6

.
NO: Replace the security alarm indicator lamp.

Step 6. Measure the voltage at C-122 security alarm indicator lamp connector.