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Toyota Tacoma (2015-2018) Service Manual / Lighting / Lighting System / Interior Light Circuit

Toyota Tacoma (2015-2018) Service Manual: Interior Light Circuit

DESCRIPTION

The illuminated entry system controls the interior lights.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.
  • If the main body ECU (multiplex network body ECU) is replaced, refer to Registration (See page ).*1
    • *1: w/ Smart Key System

PROCEDURE

1.

PERFORM ACTIVE TEST USING TECHSTREAM (ILLUMINATED ENTRY SYSTEM)

(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 / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Main Body

Tester Display

Test Part

Control Range

Diagnostic Note

Illuminated Entry System

Interior lights

ON/OFF

Interior light door switch on and all doors closed

OK:

Each light fades in.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

2.

CHECK HARNESS AND CONNECTOR (BATTERY - DRIVER SIDE JUNCTION BLOCK)

(a) Disconnect the driver side junction block connector.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

1D-29 - Body ground

Interior light switch in DOOR position

11 to 14 V
Text in Illustration

*1

Front view of wire harness connector

(to Driver Side Junction Block)
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

3.

INSPECT DRIVER SIDE JUNCTION BLOCK

(a) Remove the driver side junction block.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

1D-29 - MB-1 (ILE)

Always

Below 1 Ω

MB-1 (ILE) - Body ground

Always

10 kΩ or higher
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

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