I can’t find any threads. Where are the charging points to connect a 7002 CTEK…..
Storing from Sat to Thurs.

 

If you open the hood, open the fuse box on the driver side and you'll see a "RED" connection point for and the ground is the on engine where the hook is at. I see the dealer uses the same charging points in the Lexus showroom.

 

Ok thanks ...I started a new thread asking ... What happens to the Hybrid battery after being stored for 7months. Can answer here also

 

Here is the best place:
lift up the grey plastic cover show in red and the battery is underneath on the 350h





YMMV,
MidCow3

 

Question please..... what makes going onto the battery directly a better choice. Or is that the Mfg's recommendation Are the Plus & Ground under the hood only for jump starting?

 

If you are trickle charging no problem. You go through some cables and resistance but unless you are try to start a car with a completely dead batter with 50 amp charge you will be okay. However, you will probably leave your hood propped up and that looks somewhat tacky. Just about any bolt or metal surface is ground. Don't connect to ECU. One guy cited a shorted metal ECU case ( I am guessing it was shorted) from a RAV5 forum that burned out the ECU when the black ground wire was connected to it. ECU should be isolated, but just to be safe don't connect to ECU. Connect to a metal bolt or engine frame metal for negative. Connect to red positive on the front under the hood connect point.

You keep asking about the traction battery; I not sure anyone has a completely definite answer. I don't think it will fully discharge; there might be some discharge though. I think with your 12 volt ICE will start up and charge traction battery through hybrid system. Could take some driving though; again not sure. I have only left mine 4-6 weeks with no apparent discharge. However, fair warning a completely discharged traction battery might require Lexus service.


YMMV,
MidCow3

 

Hey thanks for your replies ... hopefully it's not an issue. 4-6 weeks would not concern me...6months plus does. Will update/follow up in June😂

 

For every car I have owned when I want to charge the battery I have always gone directly to the battery whenever possible and have never encountered any problems doing so.

 

Under normal conditions does the small 12V start the engine or does the traction battery start the engine?

 

I don't have a hybrid, but mt understanding is that starting the ICE is the reason for the 12 volt battery.

 

The 12 volt battery does not start the ICE . The hybrid system using MG1 MG2 starts the ICE using traction battery. The 12 volt battery supplies power to all the functions normally supplied in a non hybrid car: lights, audio, power seats, power windows, cruise control, display gauges, microprocessors for all safety items, security etc.

YMMV,
Midcow3

 

There used to be a guy on this forum that said "Ground is Ground" and erroneously posted mis-information that anywhere in the engine compartment was fine to use for the negative terminal, But as life goes on, learned that not every bolt in the hybrid engine compartment is acceptable for a ground point.
You may want to look at past posts on the topic for a diagram on the correct location for ground connection as specified by Toyota. Some bolts are not to be connected close to the ECU..... others further away may be AOK
Charge on !!

 

Follow up. The charger worked out great. The NX-H was stored from Mid Oct to June 1st. Started right up..not a single issue. Will do the same next week.

 

Good deal the black lead can be connected anywhere on the car frame or engine bolt, these are all ground; remember a "ground is a ground". However, there are some shiny metal bolts such as ECU that are NOT GROUND; do not connect to them. For the positive you connect directly to the red battery terminal or under the hood there is a battery red connector that goes directly to the positive battery terminal.

It is always a good proactive to fuse any circuit. Most battery trickle chargers have built in fuses. While it will work to connect directly to the positive and negative battery terminals without fusing it is not prudent in case you short out the circuit.

YMMV,
MidCow3

P.S. - You connected correctly Good Job!

 

I'd squirt some rust prevention on that surface rust seen on the body seam there before it gets worse, even a spot of grease will help out.