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Lexus IS Remote Touch Fix Guide

This document provides troubleshooting steps for when the switch lights on the remote touch do not illuminate in 2014-2016 Toyota IS200T, IS250, IS300, and IS350 vehicles. It instructs technicians to check the harness and connector for the illumination signal by measuring the voltage, check the harness between the remote touch and combination meter by measuring resistance, and replace the remote touch board if the first two steps do not resolve the issue.

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Jack Cardiag
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119 views3 pages

Lexus IS Remote Touch Fix Guide

This document provides troubleshooting steps for when the switch lights on the remote touch do not illuminate in 2014-2016 Toyota IS200T, IS250, IS300, and IS350 vehicles. It instructs technicians to check the harness and connector for the illumination signal by measuring the voltage, check the harness between the remote touch and combination meter by measuring resistance, and replace the remote touch board if the first two steps do not resolve the issue.

Uploaded by

Jack Cardiag
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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3/6/2017 AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: Switch Lights of Remote Touch do not Illuminate; 2014 ­ 2016 MY IS200T IS250 IS300 IS350 [04/2013 ­  …

Last Modified: 03­03­2017 6.7:8.0.40 Doc ID: RM100000000609U


Model Year Start: 2014 Model: IS200T Prod Date Range: [04/2013 ­           ]

Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: Switch Lights of Remote Touch do not Illuminate; 2014 ­ 2016
MY IS200T IS250 IS300 IS350 [04/2013 ­        ]

Switch Lights of Remote Touch do not Illuminate

DESCRIPTION
Power is supplied to the remote operation board illumination when the light control switch is in the tail or head
position.

HINT:
Only the "AUDIO", "MENU" and return switches on the remote operation board illuminate.

WIRING DIAGRAM

CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE
https://techinfo.toyota.com/t3Portal/resources/jsp/siviewer/index.jsp?dir=rm/RM30G0U&locale=en&User=false&publicationNumber=RM30G0U&objType=toc/… 1/3
3/6/2017 AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: Switch Lights of Remote Touch do not Illuminate; 2014 ­ 2016 MY IS200T IS250 IS300 IS350 [04/2013 ­  …

1. CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)

(a) Disconnect the K78 remote operation board connector.

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

TESTER CONNECTION CONDITION SPECIFIED CONDITION

K78­1 (ILL+) ­ Body ground Light control switch in tail or head position 11 to 14 V

NG REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

CHECK HARNESS AND CONNECTOR (REMOTE OPERATION BOARD ­ COMBINATION METER
2.
ASSEMBLY)

(a) Disconnect the K78 remote operation board connector.

(b) Disconnect the K3 combination meter assembly connector.

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

TESTER CONNECTION CONDITION SPECIFIED CONDITION

K78­8 (ILL­) ­ K3­39 (ILL­) Always Below 1 Ω

K78­8 (ILL­) ­ Body ground Always 10 kΩ or higher

NG REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3. REPLACE REMOTE OPERATION BOARD

(a) Replace the remote operation board.

Click here 

(b) Check if the switch illumination turns on.

https://techinfo.toyota.com/t3Portal/resources/jsp/siviewer/index.jsp?dir=rm/RM30G0U&locale=en&User=false&publicationNumber=RM30G0U&objType=toc/… 2/3
3/6/2017 AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: Switch Lights of Remote Touch do not Illuminate; 2014 ­ 2016 MY IS200T IS250 IS300 IS350 [04/2013 ­  …

OK:
The switch illumination turns on when the light control switch is in the tail or head position.

OK END

NG GO TO METER / GAUGE SYSTEM

https://techinfo.toyota.com/t3Portal/resources/jsp/siviewer/index.jsp?dir=rm/RM30G0U&locale=en&User=false&publicationNumber=RM30G0U&objType=toc/… 3/3

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