Toyota Highlander, CEL, VSC problems

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jonyb

Copper - Posts: 60

Joined: December 04, 2004

Location: Kentucky, United States

Posted: November 28, 2006 at 7:03 PM / IP Logged

Another installer in my bay attempted a remote start/keyless on a 2005 Toyota Highlander. After putting the vehicle in gear and all connections are made, it throws the CEL and VSC light on. With IGN1 and IGN2 wires disconnected, it's fine. Tech support told him to diode isolate the 2 start wires. That doesn't seem to make sense to me since with the IGN1 and 2 wires cut, it didn't throw the codes.

Anyone????

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JWorm

Platinum - Posts: 2,208

Joined: December 11, 2002

Location: New Hampshire, United States

Posted: November 28, 2006 at 7:56 PM / IP Logged

Did you just jump the 2 starter wires together?

About 2 years ago another installer at my former shop didn't isolate the 2 starter wires properly on the same vehicle you have. The same lights came on. I correctly isolated the starter wires....lights went away.

I'm not sure why cutting ign1 and ign2 makes the lights go away.

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Chris Luongo

Platinum - Posts: 3,746

This member consistently provides reliable information

Joined: May 21, 2002

Location: Massachusetts, United States

Posted: November 28, 2006 at 8:04 PM / IP Logged

I'll confess that I've jumped together many Highlander starter wires, and I haven't seen this problem.

(On the new-style Solara, however, if the starter wires are jumped together, the dash lights go out when the car is in gear.)

Is it possible that one of the ignition wires is powered up as an accessory by mistake?

In general, on Toyotas, the car will run with only Ignition 1 powered, but with many warning lights, and no power to the heater.

Check the underhood fuses too, AM1 and AM2. If one of those is blown, you could have the symptoms you describe.

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jonyb

Copper - Posts: 60

Joined: December 04, 2004

Location: Kentucky, United States

Posted: November 28, 2006 at 8:17 PM / IP Logged

Chris I'll check the fuses tomorrow. All of the accessory and ignition wires go to the correct wires on the Highlander, but I can't recall what he did for the second starter relay. It could possibly be wired wrong. This job is a birds nest and I'm about to make him remove it and start over.

Jworm: The start wires aren't jumped together, he did use a relay...

Thanks for the replies guys...

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Toyota Highlander, CEL, VSC problems

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