2003 Toyota Highlander

Printed From: the12volt.com
Forum Name: Vehicle Wiring Information & File Requests
Forum Discription: Request Car Alarm, Car Stereo, Cruise Control, Remote Starter, Navigation, Mobile Video, and Other Vehicle Specific Wiring Info, Manuals, Tech Tips
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=26680
Printed Date: May 11, 2025 at 6:11 PM

Topic: 2003 Toyota Highlander

Posted By: IRNOTSLOW
Subject: 2003 Toyota Highlander
Date Posted: February 17, 2004 at 9:34 PM

Installing a remote starter in a 03 highlander, doeas any one know the diagram. Also I am using the PKT by pass mod. thanks

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irnotslow

Replies:

Posted By: boomer_106
Date Posted: February 19, 2004 at 12:45 PM

Toyota

Highlander

2003

Remote Starter Wiring Colors and Notes
Function	Vehicle Color	Location
Start:	BLACK/ White (+)	Ignition switch harness
Ignition #1:	Black (+)	Ignition switch harness*
Ignition #2:	BLACK / YELLOW (+)	Ignition switch harness
Ignition #3:	red (Key Sense Wire)	***
Accessory:	Pink (+)	Ignition switch harness
Brake Light:	GREEN / WHITE (+)	Brake pedal switch
Tach Signal:	WHITE/ Green (AC)	In harness at the ECM**
Parking Lights:	Green (+)	Drivers kick panel
Headlights:	N/A
OEM Alarm Disarm:	Use key sense wire
OEM Alarm Arm:	N/A
Diesel Glow Plug:	N/A
Clutch Bypass Wire:	N/A
Notes:	This vehicle is equipped with a Transponder Anti-Theft security system. Use Universal Alarm Bypass Module part # 2x402 where X can be any number. The Engine Control Module (ECM) is behind the glove box, it is the module to the left of the glove box. ** The key sense wire will measure 12 volts all the time till you place the key inside the ignition switch and the key sense wire will ground. Connect the WHITE/ black wire from the unit (ignition 3) to the wire and that will disarm the OEM factory alarm.

Toyota

Highlander

2003

Alarm and Keyless Entry Wiring Colors and Notes
Function	Vehicle Color	Location
Constant +12 Volts:	White & Blue / YELLOW (+)	Ignition switch harness
Starter Kill:	BLACK/ White (+)	Ignition switch harness
Ignition +12 Volts:	Black (+)	Ignition switch harness*
Dome Lights/Superv:	Comes on with unlock
OEM Horn:	WHITE/ Red (-)	Steering column harness
Power Lock:	See note below	***
Power Unlock:	See note below	***
Trunk Release:	N/A
Alarm Input Wire:	Comes on with unlock
Notes:	***See Installation Note # 212 Modern Toyota Door Locks Diagram.

Posted By: markcars
Date Posted: March 06, 2004 at 7:54 AM

IRNOTSLOW wrote:

Installing a remote starter in a 03 highlander, doeas any one know the diagram. Also I am using the PKT by pass mod. thanks

Hey Irnotslow, did your highlander have a transponder in the keys? Just curious since I did not have one. I did not get the base model so I am wondering why and want to know a little more before asking my dealer.

How did your install go?

Posted By: IRNOTSLOW
Date Posted: March 06, 2004 at 8:39 AM

markcars,

the install went very well. the key head is a little thicker than most heads. Also if you remove the steering colum clam shell. folow the lock cynlinder from the light ring to the floor. you shoud see a yellow sticker, below that is a harness ( my plug was black) with about 5-7 wires sid by side. If unplus them and then try to start you car it should not start. it will however turn over. These wire are also used for the transponder by-pass. You will also ned to conect the key-sense wire, it is on a 4 or two wire harnes near the cylinder. it is the OLNY wire that wil show 12 or less volts with the key OUT, when you insert the key it wil show 0

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irnotslow

Posted By: markcars
Date Posted: March 08, 2004 at 11:33 AM

How did you do the door locks? And the door-lock detection? I am still not complete with my install.
Also did you have 2 ignition outputs from your RS or just 1? I have 1 and need to make 2 now. I guess more fun next weekend!