Can we do this? (aka The DIY Cruise Control Thread)

[Vince87]

Hey Guys ! I ordered the Clutch Switch from a Toyota dealer (33CAD$) and I have a quick question for those who installed it on their Yaris : Is there's a way to avoid having to get a wire from that switch to the engine bay (is the blue CC wire going anywhere in the dash) ?

If my understanding is correct, I have to run a wire from the switch to the CC wire (blue) in the engine bay fuse box, and ground the other wire from the switch. I think I read that someone had slice the wire going to the fuse box to connect it to the wire going to Pin40 of connector A21 and I dont understand why this would have to be done since the blue wire only has to be grounded when the clutch pedal is depressed.

PS. to all those who did the installation on a MT car without the clutch switch, BUY IT ASAP ! I barely blown my engine after riding for 3.5 hours when I put my car in neutral (yeah I know that was dumb, I was tired).

Thanks for your help!

[CTScott]

Originally Posted by Vince87

Hey Guys ! I ordered the Clutch Switch from a Toyota dealer (33CAD$) and I have a quick question for those who installed it on their Yaris : Is there's a way to avoid having to get a wire from that switch to the engine bay (is the blue CC wire going anywhere in the dash) ?

If my understanding is correct, I have to run a wire from the switch to the CC wire (blue) in the engine bay fuse box, and ground the other wire from the switch. I think I read that someone had slice the wire going to the fuse box to connect it to the wire going to Pin40 of connector A21 and I dont understand why this would have to be done since the blue wire only has to be grounded when the clutch pedal is depressed.

PS. to all those who did the installation on a MT car without the clutch switch, BUY IT ASAP ! I barely blown my engine after riding for 3.5 hours when I put my car in neutral (yeah I know that was dumb, I was tired).

Thanks for your help!

The clutch switch is totally separate from the CC wire to the ECM. The ECM has an input "D" (Connector C20 - Pin 56 on the ECM) for the cruise control clutch switch. It routes through the under hood fuse panel, so you can tap it there, rather than going to the ECM.

The 09 LBs have the clutch switch connector, but prior years and the Sedan apparently do not. From the clutch switch, two wires go up to the fuse panel and connect to the blue and white wires shown in the following picture. Neither gets grounded.

[Vince87]

Thanks CTScott ! you always have the answer faster than anybody else... is there's a more straightfoward route to the fuse box than the grommet under the carpet on the passenger side (thats were the Pin40 and my amp wires a going to the engine bay) ?

ps. I thought that the white wire was a ground, thats why I believed I could ground it on the chassis instead...

[CTScott]

Originally Posted by Vince87

Thanks CTScott ! you always have the answer faster than anybody else... is there's a more straightfoward route to the fuse box than the grommet under the carpet on the passenger side (thats were the Pin40 and my amp wires a going to the engine bay) ?

ps. I thought that the white wire was a ground, thats why I believed I could ground it on the chassis instead...

You can go through the driver's side grommet, which goes in up behind the inside fuse panel and comes out just behind the battery.

White with a black stripe is always ground on the Yaris. Solid white is often 12 V power (which is the case with the wiring for the clutch switch).

[Vince87]

Nice thanks ! I didnt wanna have a wire hanging loose from one side of the engine bay to the other...

ps for those who waited for a clear DIY with pictures for the 07-08 LB (with or without MT) I will built one this week !