Toyota Tundra Service Manual: Interior Light Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) controls the operation of the following lights:

• Roof console box (front interior light)
• No. 1 room light assembly (rear interior light)
• Foot light bulb (w/ Foot Light)
• Transponder key coil (w/ Ignition Key Cylinder Light)

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the bulbs for circuits related to this system before performing the following procedure.

PROCEDURE

(a) Using the Techstream, perform the Active Test.

Click here

OK:

All of the interior lights turn on when ON is selected.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

• *1: w/ Transponder Key Light
• *2: w/ Foot Light

(a) Disconnect the 3I driver side junction block assembly connector.

(b) Disconnect the J132 interior dome light switch assembly connector.

(c) Disconnect the J168 transponder key coil connector.*1

(d) Disconnect the J51 foot light bulb connector.*2

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

Standard Resistance:

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

(a) Remove the driver side junction block assembly. Click here

*a Component without harness connected (Driver Side Junction Block Assembly)

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

Click here

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

Standard Resistance:

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY