Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Door Courtesy Switch Circuit

DESCRIPTION

The main body ECU (multiplex network Body ECU) receives a door open or closed signal from each door courtesy light switch.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION / NOTICE / HINT

NOTICE:

  • Recognition code registration is necessary when replacing the main body ECU (multiplex network body ECU).
  • 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 COURTESY LIGHT SWITCH)

(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) According to the display on the Techstream, read the Data List.

Main Body

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

RR Door Courtesy SW

Rear door courtesy light switch RH signal / ON or OFF

ON: Rear door RH open

OFF: Rear door RH closed

-

RL Door Courtesy SW

Rear door courtesy light switch LH signal / ON or OFF

ON: Rear door LH open

OFF: Rear door LH closed

-

FR Door Courtesy

Front door courtesy light switch RH signal / ON or OFF

ON: Front door RH closed

OFF: Front door RH open

-

FL Door Courtesy

Front door courtesy light switch LH signal / ON or OFF

ON: Front door LH closed

OFF: Front door LH open

-

OK:

Normal conditions listed above are displayed.

Result

Result

Proceed to

OK

A

NG (Rear door courtesy light switch RH does not operate)

B

NG (Rear door courtesy light switch LH does not operate)

C

NG (Front door courtesy light switch RH does not operate)

D

NG (Front door courtesy light switch LH does not operate)

E

A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

C

GO TO STEP 5

D

GO TO STEP 8

E

GO TO STEP 10

B

2.

INSPECT REAR DOOR COURTESY LIGHT SWITCH RH

(a) for Double Cab

(1) Remove the rear door courtesy light switch RH.

(2) Inspect the rear door courtesy light switch RH (See page (b) for Access Cab ).

(b) for Access Cab

(1) Remove the rear door courtesy light switch RH upper side.

(2) Remove the rear door courtesy light switch RH lower side.

(3) Inspect the rear door courtesy light switch RH upper side (See page (4) Inspect the rear door courtesy light switch RH lower side (See page ).

(4) Inspect the rear door courtesy light switch RH lower side (See page Result ).

Result

Result

Proceed to

OK

A

NG (for Double Cab)

B

NG (for Access Cab)

C

B

REPLACE REAR DOOR COURTESY LIGHT SWITCH RH

C

REPLACE REAR DOOR COURTESY LIGHT SWITCH RH

A

3.

CHECK HARNESS AND CONNECTOR (REAR DOOR COURTESY LIGHT SWITCH RH - DRIVER SIDE JUNCTION BLOCK)

(a) for Double Cab

(1) Disconnect the D18 rear door courtesy light switch RH connector.

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D18-1 - 1D-30

Always

Below 1 Ω

D18-1 - Body ground

Always

10 kΩ or higher

(b) for Access Cab

(1) Disconnect the D16 and D25 rear door courtesy light switch RH connector.

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D16-1 - 1D-30

Always

Below 1 Ω

D16-1 - Body ground

Always

10 kΩ or higher

D25-2 - 1D-30

Always

Below 1 Ω

D25-2 - Body ground

Always

10 kΩ or higher

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 junction block (See page (c) Measure the resistance according to the value(s) in the table below. ).

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

MB-2 (RCTY) - 1D-30

Always

Below 1 Ω

Text in Illustration

*1

Component without harness connected

(Driver Side Junction Block)

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPLACE DRIVER SIDE JUNCTION BLOCK

5.

INSPECT REAR DOOR COURTESY LIGHT SWITCH LH

(a) for Double Cab

(1) Remove the rear door courtesy light switch LH.

(2) Inspect the rear door courtesy light switch LH (See page (b) for Access Cab ).

(b) for Access Cab

(1) Remove the rear door courtesy light switch LH upper side.

(2) Remove the rear door courtesy light switch LH lower side.

(3) Inspect the rear door courtesy light switch LH upper side (See page (4) Inspect the rear door courtesy light switch LH lower side (See page ).

(4) Inspect the rear door courtesy light switch LH lower side (See page Result ).

Result

Result

Proceed to

OK

A

NG (for Double Cab)

B

NG (for Access Cab)

C

B

REPLACE REAR DOOR COURTESY LIGHT SWITCH LH

C

REPLACE REAR DOOR COURTESY LIGHT SWITCH LH

A

6.

CHECK HARNESS AND CONNECTOR (REAR DOOR COURTESY LIGHT SWITCH LH - DRIVER SIDE JUNCTION BLOCK)

(a) for Double Cab

(1) Disconnect the D15 rear door courtesy light switch LH connector.

(2) Disconnect the 1H driver side junction block connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D15-1 - 1H-36

Always

Below 1 Ω

D15-1 - Body ground

Always

10 kΩ or higher

(b) for Access Cab

(1) Disconnect the D13 and D26 rear door courtesy light switch LH connector.

(2) Disconnect the 1H driver side junction block connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D13-1 - 1H-36

Always

Below 1 Ω

D13-1 - Body ground

Always

10 kΩ or higher

D26-2 - 1H-36

Always

Below 1 Ω

D26-2 - Body ground

Always

10 kΩ or higher

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 junction block (See page (c) Measure the resistance according to the value(s) in the table below. ).

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

MB-13 (LCTY) - 1H-36

Always

Below 1 Ω

Text in Illustration

*1

Component without harness connected

(Driver Side Junction Block)

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPLACE DRIVER SIDE JUNCTION BLOCK

8.

INSPECT FRONT DOOR COURTESY LIGHT SWITCH RH

(a) Remove the front door courtesy light switch RH.

(b) Inspect the front door courtesy light switch RH (See page ).

NG

REPLACE FRONT DOOR COURTESY LIGHT SWITCH RH

OK

9.

CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY LIGHT SWITCH RH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the D12 front door courtesy light switch RH connector.

(b) Disconnect the M6 main body ECU (multiplex network body ECU) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D12-1 - M6-27 (FRCY)

Always

Below 1 Ω

D12-1 - Body ground

Always

10 kΩ or higher

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

10.

INSPECT FRONT DOOR COURTESY LIGHT SWITCH LH

(a) Remove the front door courtesy light switch LH.

(b) Inspect the front door courtesy light switch LH (See page ).

NG

REPLACE FRONT DOOR COURTESY LIGHT SWITCH LH

OK

11.

CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY LIGHT SWITCH LH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the D11 front door courtesy light switch LH connector.

(b) Disconnect the M6 main body ECU (multiplex network body ECU) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D11-1 - M6-6 (FLCY)

Always

Below 1 Ω

D11-1 - Body ground

Always

10 kΩ or higher

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

Headlight Dimmer Switch Circuit
DESCRIPTION The main body ECU (multiplex network body ECU) receives the following switch information: Light control switch position is off (DRL OFF), tail, head or AUTO (DRL). Dimmer ...

Front Fog Light Circuit
DESCRIPTION The main body ECU (multiplex network body ECU) controls the front fog lights. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuses for circuits related to this s ...

Other materials:

Precaution
PRECAUTION 1. PRECAUTION FOR HEADLIGHT BULB REPLACEMENT (a) When any defects such as deformation, cracks, dents, chipping, etc. are identified on the headlight, replace it with a new one. (b) Even if the operation seems to be normal, the fail-safe function may be defective. (c) Since halogen b ...

List of storage features
Glove box Overhead console (Access Cab and Double Cab models) Bottle holders Auxiliary boxes Front console box (separated type front seat only) Cup holders CAUTION ■Items that should not be left in the storage spaces Do not leave glasses, lighters or spray cans in the stora ...

Parts Location
PARTS LOCATION ILLUSTRATION ILLUSTRATION ILLUSTRATION ILLUSTRATION ...

© 2011-2020 Copyright www.ttguide.net