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Discussion Starter · #1 ·
Did anybody did jump start on CT 200h? One of my friends got Prius and tough time finding (not a car guy :D) battery hooks (even though car got two types batteries :confused:) for jump start from other vehicle. CT200h got same engine and might help.
 

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Battery in trunk.
 

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There is a power terminal in the front right of the engine compartment that has a wire that runs to the trunk, where both traction and 12v batteries are located. This terminal is directly connected to your 12v battery. And you can use this to jumpstart the car without having to go into the trunk and remove a bunch of panels. This system is very similar to several BMWs I have had in the past where the battery was moved to the trunk to allow for more room in the engine compartment and for more balanced weight distribution.
 

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Most of the jumper cables have both positive and negative lines bound together. From the picture in the manual, the two connections are quite away from each other. This mean we may have to split the two lines of the jumper cable apart to connect to the CT +/- posts under the hood.

Tim
 

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Well, technically, you would connect the negative clamp to any metallic area on the CT body; there isn't a passthrough negative terminal like there is for the positive terminal in the engine compartment. There are plenty of areas close to the positive terminal that you can connect the negative clamp to. You don't necessarily have to connect the negative clamp to the base of the engine as pictured.
 

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Thanks for the info. Let's hope that nobody has had to jump start one of these yet... that wouldn't be very good.
 

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Well, techically, you would connect the negative clamp to any metallic area on the CT body, there isn't a passthrough negative terminal like there is for the positive terminal in the engine compartment. There is plenty of areas close to the positive terminal that you can connect the negative clamp to. You don't necessarily have to connect the negative clamp to the base of the engine as pictured.
Great series of answers Matt -- THANK YOU :)
 

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Good answer, Matt.

Just not everyone would know that. The tech writer should have thought of these details when s/he wrote the instruction. Two separate jumper lines in the picture are just not right :)

Tim
 

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Discussion Starter · #11 ·
Thank you all for valuable information. I hope nobody has to do jump start the CT's
 

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Discussion Starter · #12 ·
All the information helps to jump start CT 200 but other way to jump start other car using CT 200 ??? I am not sure..
 

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All the information helps to jump start CT 200 but other way to jump start other car using CT 200 ??? I am not sure..
I would not take the chance of ruining something on the CT. :eek:
 

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Good answer, Matt.

Just not everyone would know that. The tech writer should have thought of these details when s/he wrote the instruction. Two separate jumper lines in the picture are just not right :)

Tim
Definitely agree with you on that. Lol. Seems to be like this throughout the manual. Had the same issue with the 2007 RX snow mode. The manual was so vague about it!
 

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All the information helps to jump start CT 200 but other way to jump start other car using CT 200 ??? I am not sure..
The procedure to jumpstarting another car using the CT is similar to a conventional car, BUT because of the electronics involved in the CT and the expensive inverter in the CT that converts AC current to DC current to charge both traction and 12 V batteries, please proceed with caution. As long as these steps are done safely, I don't foresee any problems or residual damage to your CT, but proceed at your own risk as always.

You would connect the jumper cables the same way, but you would actually connect the cables directly to the 12V battery in the rear of the CT vs. the front terminal because there is no (-) terminal in the front engine compartment that is directly connected to the (-) terminal on the CT's 12 V battery. For some reason, just connecting to ground doesn't seem to work. You need all the juice you can get from the CT's tiny battery! On the other person's car, the black jumper should be connected to any metal part of the chassis that is grounded, rather than directly to the dead battery's (-) terminal.

Take the other person's keys. You don't want them attempting to crank their car while your CT is connected; the CT's 12 V battery is very small (it technically doesn't actually start the car per se; it provides only enough juice to power up relays and the ECU, which activate the traction battery, and then powers up the inverter and starts the ICE). The max draw on the 12V battery is 100 amps. Any draw above that MAY blow your 100A fuse, relays, and possibly damage your inverter (which is REALLY expensive!!!).

Once everything is connected, just start your CT and wait. There is no need to accelerate or anything like that. The hybrid system is smart! Once it sees the 12V battery is draining, the ECU will call on the traction battery to automatically replenish the 12V battery. And that's when you'll see the traction battery bars start to go down on your energy monitor. Once the traction battery starts to drain lower, the ECU will start the ICE which powers up the inverter to charge the traction battery as it continues to charge the 12V battery, which in turn is charging the dead car's battery. Follow so far?

After about 5-10 minutes of waiting or so, depending on how big the dead car's engine is (the larger the engine, the longer you'll have to wait), turn off the CT, disconnect ALL jumper cables. Some cars equipped with V8s may take up to 20 minutes of waiting! Bring a coloring book.

The reason for disconnecting all jumper cables is because when the person attempts to crank his/her car, it won't be able to draw additional current from your CT's battery and potentially fry the relay, fuses, inverter, etc.

If everything works, their car should start!
 

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Discussion Starter · #16 ·
Thank you Matt for very good explanation for jump start other car! It looks really risky and bit complicated with so much electronics involved in hybrid system. I personnaly prefer not to attempt unless I have all instructions to do it.

Thanks,
DY.
 

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Matt,

Are you sure you are a nurse? You are too much of a car geek. Nursing school curriculum sure has changed a lot :)

Tim
 

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LOL. I WAS a car geek. I sure do miss those days when I'd have time to work on cars. Most of what I know about hybrids I learned from my friends who own Prii.
 

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Okay, bad thing happened last night when I came back to my CT in the hospital parking lot from visiting someone...headlights were still turned on and they were dim. Got into the car pressed the start button, all warning lights came on on the dash and then all went dark. Pressing the start button (with foot on brake of course) did nothing. Even the dome light was dim. Called Lexus road side assistance and within 20 minutes a tow truck came with a portable booster pack. He hooked the positive to the battery in the front of the car and the negative to a small nib near the battery that was marked in black (i.e. negative). Pressed the start button and voila car came back to life. I don't know know why the lights stayed on originally as my car is set for them to go off after 60 sec. I am really surprised and annoyed that the 12v starter battery would die after about 1 hour and the weather was not very cold 3C. May need some investigation....
 

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Thanks for the instructions matt. Worked a treat starting my dad's Astra the other day. Would have had to wait 5 hours for the AA (uk roadside recovery service, not the recovery service for alcoholics) otherwise
 
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