AXMACD

First off I’ll say it isn’t a bad thing, not really a huge fan of it, but some consistency would be nice. My 2017 MDX Elite will only shut off occasionally at a stop light usually after I’ve been running errands for a while in town. My battery seems to be fine, no issues starting in the cold, but like I said some consistency would be nice.

Does anyone know that the parameters are for the auto stop/start to engage? Is it dependant on the battery condition?

Brown13

Yes, battery condition will determine whether it works or not.My 2018 hadn't worked since September.So I was thinking temperature had something to do with it. Talking to others at Christmas time,made Me check battery charge level. Found charge level at 40%.So I charged battery to full.Now it shuts off at every stop. What I learned since, is that the AGM battery will still start Your car at 20% charge. If You don't drive everyday the charge level will be low. Cold weather will reduce charge level in all batteries. Honda uses a a dual mode charging system that may charge for 15 minutes after cold start,then drop to 12.2 volts during acceleration and charge to 14,1 volts during deceleration. So if You monitor Your charging system voltage,it will always be fluctuating.If You have battery tested it will show good battery even if charge level is low. Hope this helps!

Zhi Liu

Here is the information on the owner’s manual page 482

■ Auto Idle Stop does not activate when:
• The Auto Idle Stop OFF button is pressed.
• The driver’s seat belt is not fastened.
• The engine coolant temperature is low or high.
• The transmission fluid temperature is low or high.
• The vehicle comes to a stop again before the vehicle speed reaches 3 mph (5
km/h) after the engine starts.
• Stopped on a steep incline.
• The transmission is in a position other than (D.
• The engine is started with the hood open.
u Turn off the engine. Close the hood before you restart the engine to activate Auto Idle Stop.
• The battery charge is low.
• The internal temperature of the battery is 14°F (−10°C). or less.
• The climate control system is in use, and the outside temperature is below −4°F
(−20°C) or over 104°F (40°C).
• The climate control system is in use, and the temperature is set to the Hi or Lo.
• is ON (indicator on).
• When the rear fan is set to maximum speed.
u Auto Idle Stop may not activate under other conditions when the rear climate control system is in use.