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Toyota Tacoma 2015-2018 Service Manual: All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch

Toyota Tacoma 2015-2018 Service Manual / Door Lock / Power Door Lock Control System / All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch

DESCRIPTION

The main body ECU (multiplex network body ECU) receives switch signals from the door control switch assembly on the front passenger door and activates the door lock motor on each door according to these signals.

WIRING DIAGRAM

PROCEDURE

PROCEDURE

1.

READ VALUE USING TECHSTREAM (Door Lock SW-Lock, Door Lock SW-Unlock)

(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

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Door Lock SW-Lock

Door control switch (power window regulator master switch assembly) or door control switch assembly lock signal/ON or OFF

ON: Lock side of door control switch (power window regulator master switch assembly) or door control switch assembly pushed

OFF: Lock side of door control switch (power window regulator master switch assembly) and door control switch assembly not pushed

-

Door Lock SW-Unlock

Door control switch (power window regulator master switch assembly) or door control switch assembly unlock signal/ON or OFF

ON: Unlock side of door control switch (power window regulator master switch assembly) or door control switch assembly pushed

OFF: Unlock side of door control switch (power window regulator master switch assembly) or door control switch assembly not pushed

-

OK:

The Techstream indicates ON or OFF according to the switch operation shown in the table.

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

2.

INSPECT DOOR CONTROL SWITCH ASSEMBLY

(a) Remove the door control switch assembly (See page ). ). (b) Inspect the door control switch assembly. ).

(b) Inspect the door control switch assembly.

(1) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Switch Condition

Specified Condition

2 (UL) - 5 (E)

Lock side of door control switch pushed

Below 1 Ω

2 (UL) - 5 (E)

Lock side of door control switch pushed

10 kΩ or higher

4 (L) - 5 (E)

Lock side of door control switch pushed

Below 1 Ω

4 (L) - 5 (E)

Lock side of door control switch pushed

10 kΩ or higher

Text in Illustration

*a

Component without harness connected

(Door Control Switch Assembly)

NG

REPLACE DOOR CONTROL SWITCH ASSEMBLY

OK

3.

CHECK HARNESS AND CONNECTOR (DOOR CONTROL SWITCH ASSEMBLY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the 1D driver side junction block connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

D27-2 (UL) - 1D-26 (UL1)

Always

Below 1 Ω

D27-4 (L) - 1D-10 (L1)

Always

Below 1 Ω

D27-5 (E) - Body ground

Always

Below 1 Ω

D27-2 (UL) - Body ground

Always

10 kΩ or higher

D27-4 (L) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

CHECK DRIVER SIDE JUNCTION BLOCK

(a) Remove the driver side junction block (See page ).

Standard Resistance:

Standard Resistance:

Tester Connection

Condition

Specified Condition

1D-16 - MB-22 (UL1)

Always

Below 1 Ω

1D-23 - MB-20 (L1)

Always

Below 1 Ω

1D-16 - Body ground

Always

10 kΩ or higher

1D-23 (L1) - Body ground

Always

10 kΩ or higher

Text in Illustration

*a

Component without harness connected

(driver side junction block)

-

-

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPLACE DRIVER SIDE JUNCTION BLOCK

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