Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Remote Up / Down Function does not Operate

DESCRIPTION

When the ignition switch is ON, the power window regulator master switch assembly sends remote up/down signals to each power window regulator motor assembly via the LIN communication line.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

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 ).
  • 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 P-Door Motor

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

OK: Normal communication

STOP: Communication stopped

-

Communication Master SW

Connection status between multiplex network master switch and main body ECU / OK or STOP

OK: Normal communication

STOP: Communication stopped

-

OK:

On the Techstream screen, OK is displayed.

NG

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

OK

2.

READ VALUE USING TECHSTREAM (MASTER SWITCH)

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

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

Master Switch (Multiplex Network Master Switch Assembly)

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

P Door P/W Auto SW

Front passenger side power window auto up/down switch signal / ON or OFF

ON: Front passenger side power window auto switch operated

OFF: Front passenger side power window auto switch not operated

-

P Door P/W Up SW

Front passenger side power window manual up switch signal / ON or OFF

ON: Front passenger side power window manual up switch operated

OFF: Front passenger side power window manual up switch not operated

-

P Door P/W Down SW

Front passenger side power window manual down switch signal / ON or OFF

ON: Front passenger side power window manual down switch operated

OFF: Front passenger side power window manual down switch not operated

-

Window Lock Switch Status

Window lock switch signal / ON or OFF

ON: Window lock switch LOCK position

OFF: Window lock switch UNLOCK position

-

OK:

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

Result

Result

Proceed to

NG

A

OK (Front passenger side power window remote up/down function does not operate)

B

A

REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY

B

REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH

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