First let me say that I have NOT performed this mod, so I do not have any pictures or wiring diagrams for anyone. I do not plan on performing this mod since the default TCS ON behavior does not bother me. However, I recently came across a post that could possibly damage the ECU, so I decided to post my recommendation on how to turn off the TCS every time the car is started. The steps are below:
1. Leave the stock TCS switch intact.
2. Purchase an automotive relay.
3. Ground the negative power lead for the relay.
4. Wire the positive power lead to the positive lead of the solenoid on the starter.
5. Connect the two output leads on the relay to the two switched connections on the TCS switch. Make sure you are connecting the leads to the switched connections and not the power connections. The switch has two power leads which power the light built into the switch, you do not want to connect the relay to these two.
6. Mod complete.
What you just did:
Every time you start the car, the power sent to the starter will power the relay which will in turn mimic pressing the TCS switch on the dash. This will reverse the default nature of the TCS system which is by default ON after starting the car. To turn the TCS back on, press the TCS button.
This mod will leave the stock TCS switch intact, and will not risk damage to the ECU. I strongly recommend NOT performing this mod if you are not at least somewhat familiar with electronic theory, automotive electrical systems, and how to install a relay. Serious damage to your ECU could result if the relay is wired incorrectly. It is important to wire the relay to the proper power wire on the starter, you want the wire that is only powered when the key is turned to the starting position. A continuity tester would be a good way to verify this.
Nisan GTR: 2010 Gun Metallic Premium
Mods: Valentine One Radar Detector, Garmin Nuvi GPS, Tint 15% all around, M25 Laser Jammer
Infiniti G35S (SOLD): 2007 Liquid Platinum G35S MT w/Premium Package
Mods: Tint (35% front, 25% rear), Debadged Rear, V1 Radar Detector, Pioneer 6 disk DVD changer (XDVP6), 1 x 2500.1 Kicker amps, 2 x 1000W RMS Kicker Subs, Myron Davis headrest DVD system (AHDM7L), M-25 Active Laser Jammer, Optima Battery
Mazda 6 (SOLD): Glacier Silver Mazda 6s V6 ATX every option minus Bose
Mods: Twin 8000K HID kits (low beams/integrated fogs), lower NA 13,000K HID fogs, Silverstar front turn signals, Chromax rear turn signals, Euro tails, Magnaflow catback, CP-E MAF Customizer, High Output Battery, Inverted 194 markers, 3 7" DVD screens, 2000W Rockford Fosgate system, Alpine DVA-9860 Head Unit, upgraded ground, Kosei K1 TS Rims, Toyo Proxes 4 tires, completely debadged, Valentine1 Radar detector, Photo Reflective Spray, Photo Reflective Plate Cover, Clear Side Markers, 5LED hyperwhite sidemarker bulbs, M-20 Active Laser Jammer, Painted Calipers, EBC Greenstuff Brake Pads
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