HELP Car Won't Start - Toyota Yaris Forums

BobTheYaris · 09-30-2015, 06:30 PM

Its an '08 Yaris HB, new battery and starter. Has 13 volts at battery, not sure where to measure at starter. When I turn the key nothing happens, and when its turned to the off posotion it just about always kicks on the fan. I'm not sure where the relay is as I can't find anything marked so, unless "ST" is it. Before it quit starting completely it had been giving me trouble a few times where it would start after a few false trys.

CTScott · 09-30-2015, 07:59 PM

Check for a loose or corroded battery terminal. Also, try measuring the battery voltage while turning the key to see if it drops with just the solenoid engaged.

BobTheYaris · 09-30-2015, 08:08 PM

the terminals are clean and tight. And the solenoid is not engaging, no noise at all when key is turned.

CTScott · 09-30-2015, 08:15 PM

Quote:

Originally Posted by BobTheYaris

the terminals are clean and tight. And the solenoid is not engaging, no noise at all when key is turned.

OK. Do you have an aftermarket alarm or remote starter installed?

If not, check the 30A ST and 15A AM2 fuses in the under hood fuse box.

The ST relay is the one that drives the solenoid and it is part of the integration relay, which is the chunk that the ST fuse is plugged into.

BobTheYaris · 09-30-2015, 08:49 PM

The car is a base model so no alarm or anything like that. Both fuses are good and has continuity. I did notice that I couldn't get continuity between any of the st relay terminals but annoyingly theres no diagran to show if it should anyway.

CTScott · 09-30-2015, 08:57 PM

Quote:

Originally Posted by BobTheYaris

The car is a base model so no alarm or anything like that. Both fuses are good and has continuity. I did notice that I couldn't get continuity between any of the st relay terminals but annoyingly theres no diagran to show if it should anyway.

On the ST relay the black wire is the +12 to the coil from the ignition switch, white/black is ground for the coil, white is +12 from the ST fuse, and Violet is the contact output to the starter.

CTScott · 09-30-2015, 09:00 PM

Actually that is the wiring out of the integration relay to the starter. On The ST relay, 1 and 2 are the coil and 3 and 5 are the contacts:

---2
.........|5 |3
---1

09-30-2015, 06:30 PM	#1
BobTheYaris View User's Garage Drives: '08 Yaris HB 2 dr Join Date: May 2013 Location: United States Posts: 102	HELP Car Won't Start Its an '08 Yaris HB, new battery and starter. Has 13 volts at battery, not sure where to measure at starter. When I turn the key nothing happens, and when its turned to the off posotion it just about always kicks on the fan. I'm not sure where the relay is as I can't find anything marked so, unless "ST" is it. Before it quit starting completely it had been giving me trouble a few times where it would start after a few false trys.

09-30-2015, 07:59 PM	#2
CTScott ULTIMATE View User's Garage Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008 Location: USA, CT Posts: 13,460	Check for a loose or corroded battery terminal. Also, try measuring the battery voltage while turning the key to see if it drops with just the solenoid engaged. __________________

09-30-2015, 09:00 PM	#7
CTScott ULTIMATE View User's Garage Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008 Location: USA, CT Posts: 13,460	Actually that is the wiring out of the integration relay to the starter. On The ST relay, 1 and 2 are the coil and 3 and 5 are the contacts: ---2 .........\|5 \|3 ---1 __________________

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09-30-2015, 08:08 PM	#3
BobTheYaris View User's Garage Drives: '08 Yaris HB 2 dr Join Date: May 2013 Location: United States Posts: 102	the terminals are clean and tight. And the solenoid is not engaging, no noise at all when key is turned.

09-30-2015, 08:49 PM	#5
BobTheYaris View User's Garage Drives: '08 Yaris HB 2 dr Join Date: May 2013 Location: United States Posts: 102	The car is a base model so no alarm or anything like that. Both fuses are good and has continuity. I did notice that I couldn't get continuity between any of the st relay terminals but annoyingly theres no diagran to show if it should anyway.