INSPECTION PROCEDURE B-4: Door-ajar warning function does not work.

CAUTION

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

COMMENTS ON TROUBLE SYMPTOM

The ETACS-ECU operates this function in accordance with the input signals below.

Ignition switch (IG1)

All of the door switches

Vehicle speed signal

If this function does not work normally, these input signal circuit(s) or the ETACS-ECU may be defective. Note that this function can be disabled/enabled by the customize function (default setting; enabled). In order to change the setting, the SWS monitor is required.

POSSIBLE CAUSES

Malfunction of the door switches

Malfunction of the engine-A/T-ECU

Malfunction of the ETACS-ECU

Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. Pulse check

Check the input signals below, which are related to the door-ajar warning function.

System switch	Check conditions
Ignition switch (IG1)	When turned from ACC to ON
All of the door switches	A door is opened when all the doors are closed
Vehicle speed signal	When the vehicle speed has reached 10 km/h or more

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 2

.
The ignition switch (IG1) signal is not received.: Refer to inspection procedure P-2 "The ignition switch (IG1) signal is not received"

.
All the door switch signals are not received.: Refer to inspection procedure P-13 "All the door switch signals are not received"

.
The vehicle speed signal is not received.: Refer to inspection procedure P-15 "The vehicle speed signal is not received"

Step 2. Check the SWS monitor customized function.

Use the SWS monitor customize function to confirm that "DOOR WARN BUZ" is set to "W.FUNCTION".

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?

YES: Go to Step 3

.
NO: Use the SWS monitor customize function to set "DOOR WARN BUZ" to "W.FUNCTION" (Refer to GROUP 54C - Adjustment function

Step 3. Retest the system.

Check that the door-ajar warning function 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.