Toyota Tacoma (2015-2018) Service Manual: Key-off Operation Function Operates even if Operating Conditions are not Satisfied

Toyota Tacoma (2015-2018) Service Manual / Window / Glass / Power Window Control System(w/ Jam Protection Function) / Key-off Operation Function Operates even if Operating Conditions are not Satisfied

DESCRIPTION

When the front doors are closed, each power window regulator motor assembly can control its power window operation for approximately 43 seconds after the ignition switch is turned from ON to off by receiving operation permission signals from the main body ECU.
However, when approximately 43 seconds have elapsed, or the driver side door or front passenger side door is opened within approximately 43 seconds of the ignition switch being turned off, the power window regulator motor assembly stops operating.
During an auto operation, when 43 seconds have passed and key-off operation is prohibited, the window operation stops immediately.

CAUTION / NOTICE / HINT

NOTICE:

The power window control system uses the LIN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the power window control system after confirming that the communication system is functioning properly (See page ).
If a power window regulator motor assembly has been replaced with a new one, initialize the power window control system (See page ).

PROCEDURE

1.	READ VALUE USING TECHSTREAM (MAIN BODY)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Enter the following menus: Body Electrical / Main Body / Data List.

(e) Read the Data List according to the display on the Techstream.

Main Body (Main Body ECU)

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Communication D-Door Motor	Connection status between front power window regulator motor assembly LH and main body ECU / OK or STOP	OK: Normal communication STOP: Communication stopped	-

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Communication D-Door Motor

Connection status between front power window regulator motor assembly LH and main body ECU / OK or STOP

OK: Normal communication

STOP: Communication stopped

OK:

On the Techstream screen, OK is displayed.

GO TO LIN COMMUNICATION SYSTEM (Proceed to How to Proceed with Troubleshooting)

2.	CHECK OPERATION FUNCTION AFTER IGNITION SWITCH IS TURNED OFF

(a) Check the power window operation function after the ignition switch is turned off.

Result

Result	Proceed to
When power window can still be operated even after opening driver side door or front passenger side door within approximately 43 seconds of ignition switch being turned off	A
When power window can still be operated even after approximately 43 seconds have elapsed after ignition switch is turned off (for Front Passenger Side, Rear LH Side or Rear RH Side)	B
When power window can still be operated even after approximately 43 seconds have elapsed after ignition switch is turned off (for All Doors)	C

GO TO STEP 4

REPLACE MAIN BODY ECU

3.	READ VALUE USING TECHSTREAM (MAIN BODY)

(a) Enter the following menus: Body Electrical / Main Body / Data List.

(b) Read the Data List according to the display on the Techstream.

Main Body (Main Body ECU)

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
FL Door Courtesy	Front door courtesy light switch LH signal / ON or OFF	ON: Driver side door closed OFF: Driver side door open	-
FR Door Courtesy	Front door courtesy light switch RH signal / ON or OFF	ON: Front passenger side door closed OFF: Front passenger side door open	-

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

FL Door Courtesy

Front door courtesy light switch LH signal / ON or OFF

ON: Driver side door closed

OFF: Driver side door open

FR Door Courtesy

Front door courtesy light switch RH signal / ON or OFF

ON: Front passenger side door closed

OFF: Front passenger side door open

OK:

On the Techstream screen, ON or OFF is displayed accordingly.

REPLACE MAIN BODY ECU

GO TO LIGHTING SYSTEM (Proceed to Door Courtesy Switch Circuit)

4.	REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (KEY-OFF OPERATION FUNCTIONING WINDOW)

(a) Replace the power window regulator motor assembly (See page for Front Door) for the window that still operates when more than 43 seconds have elapsed after the ignition switch was turned off.

5.	PERFORM INITIALIZATION (APPLICABLE LOCATION)

(a) Initialize the power window regulator motor assembly (See page ).

6.	CHECK OPERATION FUNCTION AFTER IGNITION SWITCH IS TURNED OFF

(a) Check the power window operation function after the ignition switch is turned off.

OK:

The power window does not operate when more than 43 seconds have elapsed after the ignition switch was turned off.

END (POWER WINDOW REGULATOR MOTOR ASSEMBLY WAS DEFECTIVE)

REPLACE MAIN BODY ECU

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