Inspection procedure B-7: Power Window Timer Function does not Work Normally.


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

COMMENTS ON TROUBLE SYMPTOM
If the power window timer function does not work, the input circuit from the ignition switch (IG1) or the driver’s door switch, the communication lines between the ETACS-ECU and the power window main switch, the power window main switch or the ETACS-ECU may be defective.

PROBABLE CAUSES

  • Malfunction of ETACS-ECU
  • Malfunction of the power window main switch
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. Check the power window main switch.
Check that all of the front passenger’s and rear door <Double cab> power windows can operate by means of the power window main switch.

Q. Is the check result normal?
Go to Step 2.
Refer to ."

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 Battery Power Supply Circuit to The ETACS-ECU ."

STEP 3. M.U.T.-III data list
Check the input signals below, which are related to the power window timer function.

  • Ignition switch: OFF
  • Drive’s door: Open
Item No.
 Item name
 Normal condition
19
 Driver’s door switch
 ON
30
 Ignition switch (IG1)
 OFF
OK: Normal conditions are displayed for all the items.

Q. Is the check result normal?
All the signals are received normally. : Go to Step 4.
The driver’s door switch signal is not received. : Refer to GROUP 54A, Inspection Procedure C-5 "One of the switch signals is not received ."
The ignition switch (IG1) signal is not received. : Refer to GROUP 54A, Inspection Procedure C-3 "The ignition switch (IG1) signal is not received ."

STEP 4. Retest the system.
Check that the power window timer function work 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 power window main switch.