INSPECTION PROCEDURE B-5: The Power Window Timer Function does not work Normally. <Not Using SWS Monitor>


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

OPERATION


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

COMMENTS ON TROUBLE SYMPTOM


If the power window timer function does not work normally, these input signal circuit(s) or the ETACS-ECU may be defective.

PROBABLE CAUSES



DIAGNOSTIC PROCEDURE


STEP 1. Check the power window main switch.


Check that all of the front passenger’s and rear door power windows can operate by means of the power window main switch.

Q. Is the check result normal?

Go to Step 2.

Refer to inspection procedure B-1 "Power windows do not work at all <Not using SWS monitor> or <Using SWS monitor>."

STEP 2. 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 3.

Refer to GROUP 54A, inspection procedure A-1 "Check the ETACS-ECU battery power supply circuit <Not using SWS monitor> or <Using SWS monitor>."

STEP 3. Pulse check


Check the input signals below, which are related to the power window timer function.
System switch
 Check conditions
Ignition switch (IG1)
 When turned from ACC to ON
Driver’s door switch
 When the driver’s door is opened
OK: The M.U.T.-III sounds or the voltmeter needle fluctuates.

Q. Are the check result normal?

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

NO <The ignition switch (IG1) signal is not received.> : Refer to GROUP 54A, inspection procedure C-2 "The ignition switch (IG1) signal is not received ."

NO <The driver’s door switch signals are not received.> : Refer to GROUP 54A, inspection procedure C-5 "The driver’s door switch signal is not received <LH drive vehicles> or <RH drive vehicles>."

STEP 4. Retest the system.


Check that the power window timer function works normally.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00, How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).

Replace the ETACS-ECU.