Toyota Tacoma (2015-2018) Service Manual: 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
.gif)
). - 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.
(c) Turn the Techstream 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 |
- |
OK:
On the Techstream screen, OK is displayed.
| NG | .gif) |
GO TO LIN COMMUNICATION SYSTEM (Proceed to How to Proceed with Troubleshooting) |
|
.gif)
|
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 |
| B | |
GO TO STEP 4 |
| C | |
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 |
- |
OK:
On the Techstream screen, ON or OFF is displayed accordingly.
| OK | |
REPLACE MAIN BODY ECU |
| NG | |
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.
| OK | |
END (POWER WINDOW REGULATOR MOTOR ASSEMBLY WAS DEFECTIVE) |
| NG | |
REPLACE MAIN BODY ECU |
Front Passenger Side Power Window Auto Up / Down Function does not Operate with
Front Passenger Side Power Window Switch
DESCRIPTION
If the manual up/down function can be performed but the auto up/down function
cannot, the fail-safe mode may be functioning.
If the power window initialization (See page
) has not b ...
Auto Down Operation does not Fully Open Power Window (Catch Protection Function
is Activated)
DESCRIPTION
If a front door glass or the power window regulator motor assembly (for driver
door) or power window regulator motor assembly (front passenger door) does not operate
smoothly, the cat ...
Other materials:
Precaution
PRECAUTION
1. PRECAUTIONS FOR REFRIGERANT HFO-1234yf (R1234yf)
(a) Compatibility
(1) The parts used in the refrigerant cycle, the compressor oil, etc. of the
HFO-1234yf (R1234yf) system are not compatible with the conventional HFC-134a (R134a)
system.
(b) HFO-1234yf (R1234yf) Refrigerant
(1 ...
System Diagram
SYSTEM DIAGRAM
Transmitting ECU (Transmitter)
Receiving ECU
Signal
Communication Method
4 wheel drive control ECU
Skid control ECU (Brake actuator assembly)
Rear differential lock status signal
H ...
Fuel information
Your vehicle must use only unleaded gasoline.
Select octane rating 87 (Research Octane Number 91) or higher. Use of unleaded
gasoline with an octane rating lower than 87 may result in engine knocking. Persistent
knocking can lead to engine damage.
At minimum, the gasoline you use should meet t ...
