Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Door Unlock Detection Switch Circuit

Toyota Tacoma 2015-2018 Service Manual / Lighting / Lighting System / Door Unlock Detection Switch Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) detects the condition of each door unlock detection switch.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION / NOTICE / HINT

NOTICE:

If the main body ECU (multiplex network body ECU) is replaced, refer to Registration (See page ).*1

  • *1: w/ Smart Key System

PROCEDURE

1.

READ VALUE USING TECHSTREAM (DOOR LOCK POS)

(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

FR Door Lock Pos

Front door RH unlock detection switch signal/LOCK or UNLOCK

LOCK: Front door RH locked

UNLOCK: Front door RH unlocked

-

FL Door Lock Pos

Front door LH unlock detection switch signal/LOCK or UNLOCK

LOCK: Front door LH locked

UNLOCK: Front door LH unlocked

-

RR-Door Lock Pos SW

Rear door RH unlock detection switch signal/ON or OFF

ON: Rear door RH unlocked

OFF: Rear door RH locked

When checking this item, make sure to check it with the rear door LH locked.

RL-Door Lock Pos SW

Rear door LH unlock detection switch/ON or OFF

ON: Rear door LH unlocked

OFF: Rear door LH locked

When checking this item, make sure to check it with the rear door RH locked.

Result

Result

Proceed to

OK

A

"FL Door Lock Pos" is not normal

B

"FR Door Lock Pos" is not normal

C

"RR-Door Lock Pos SW" is not normal

D

A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

C

GO TO STEP 5

D

GO TO STEP 8

B

2.

INSPECT FRONT DOOR LOCK ASSEMBLY LH

(a) Remove the front door lock assembly LH.

(b) Inspect the front door lock assembly LH.

OK:

Front door lock assembly LH is normal.

NG

REPLACE FRONT DOOR LOCK ASSEMBLY LH

OK

3.

CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK ASSEMBLY LH - DRIVER SIDE JUNCTION BLOCK AND BODY GROUND)

(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

D19-8 (LSSR) - 1D-11

Always

Below 1 Ω

D19-8 (LSSR) - Body ground

Always

10 kΩ or higher

D19-7 (E) - Body ground

Always

Below 1 Ω

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

INSPECT DRIVER SIDE JUNCTION BLOCK

(a) Remove the driver side junction block (See page (b) Remove the main body ECU (multiplex network body ECU) from the driver side ).

(b) Remove the main body ECU (multiplex network body ECU) from the driver side junction block.

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

Text in Illustration

*a

Component without harness connected

(Driver Side Junction Block)

-

-

Standard Resistance:

Tester Connection

Condition

Specified Condition

1D-11 - MB-19 (LSFL)

Always

Below 1 Ω

NG

REPLACE DRIVER SIDE JUNCTION BLOCK

OK

5.

INSPECT FRONT DOOR LOCK ASSEMBLY RH

(a) Remove the front door lock assembly RH.

(b) Inspect the front door lock assembly RH.

OK:

Front door lock assembly RH is normal.

NG

REPLACE FRONT DOOR LOCK ASSEMBLY RH

OK

6.

CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK ASSEMBLY RH - DRIVER SIDE JUNCTION BLOCK AND BODY GROUND)

(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

D20-7 (LSSR) - 1D-24

Always

Below 1 Ω

D20-7 (LSSR) - Body ground

Always

10 kΩ or higher

D20-8 (E) - Body ground

Always

Below 1 Ω

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

7.

INSPECT DRIVER SIDE JUNCTION BLOCK

(a) Remove the driver side junction block (See page (b) Remove the main body ECU (multiplex network body ECU) from the driver side ).

(b) Remove the main body ECU (multiplex network body ECU) from the driver side junction block.

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

Text in Illustration

*a

Component without harness connected

(Driver Side Junction Block)

-

-

Standard Resistance:

Tester Connection

Condition

Specified Condition

1D-24 - MB-17 (LSFR)

Always

Below 1 Ω

NG

REPLACE DRIVER SIDE JUNCTION BLOCK

OK

8.

INSPECT REAR DOOR LOCK ASSEMBLY LH

(a) Remove the rear door lock assembly LH.

(b) Inspect the rear door lock assembly LH.

OK:

Rear door lock assembly LH is normal.

NG

REPLACE REAR DOOR LOCK ASSEMBLY LH

OK

9.

CHECK HARNESS AND CONNECTOR (REAR DOOR LOCK ASSEMBLY LH - DRIVER SIDE JUNCTION BLOCK AND BODY GROUND)

(a) Disconnect the 1H 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

D21-6 (LSSR) - 1H-27

Always

Below 1 Ω

D21-6 (LSSR) - Body ground

Always

10 kΩ or higher

D21-9 (E) - Body ground

Always

Below 1 Ω

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

10.

INSPECT REAR DOOR LOCK ASSEMBLY RH

(a) Remove the rear door lock assembly RH.

(b) Inspect the rear door lock assembly RH.

OK:

Rear door lock assembly RH is normal.

NG

REPLACE REAR DOOR LOCK ASSEMBLY RH

OK

11.

CHECK HARNESS AND CONNECTOR (REAR DOOR LOCK ASSEMBLY RH - DRIVER SIDE JUNCTION BLOCK AND BODY GROUND)

(a) Disconnect the 1A 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

D22-6 (LSSR) - 1A-41

Always

Below 1 Ω

D22-6 (LSSR) - Body ground

Always

10 kΩ or higher

D22-9 (E) - Body ground

Always

Below 1 Ω

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

12.

INSPECT DRIVER SIDE JUNCTION BLOCK

(a) Remove the driver side junction block (See page (b) Remove the main body ECU (multiplex network body ECU) from the driver side ).

(b) Remove the main body ECU (multiplex network body ECU) from the driver side junction block.

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

Text in Illustration

*a

Component without harness connected

(Driver Side Junction Block)

-

-

Standard Resistance:

Tester Connection

Condition

Specified Condition

1H-27 - MB-5 (LSR)

Always

Below 1 Ω

1A-41 - MB-5 (LSR)

Always

Below 1 Ω

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPLACE DRIVER SIDE JUNCTION BLOCK

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