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2020 Acura RDX — no crank with full dash power, then it starts later — Orange County owner question

ProjectTraveler413Community StarterJun 14, 20262020 Acura RDX SH-AWDOrange County
2020 Acura RDX SH-AWD, about 49,500 miles. Twice I have had full lights and accessories but no crank. After waiting a few minutes it starts normally. Battery terminals look clean. What would you want to measure during the actual failure?
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6 replies

BatteryDIYerCommunity StarterCommunity StarterJun 14, 2026permalink
Start with the test that can prove you wrong. Loaded-suspension checks on the 2020 Acura RDX catch play that a wheels-hanging inspection misses. That's the branch I'd chase this week. I'd want that in writing, not as a promise. Your commute and mine probably aren't the same, but the test still applies. Checking again after work.
NewCarRoadie353Community StarterCommunity StarterJun 15, 2026permalink
Intermittent stuff lies if you only catch it once. Get a real battery/charging test on the 2020 Acura RDX, not just resting voltage, before blaming a module. That's the branch I'd chase this week. On “no crank with full dash power, then,” that was the fork that mattered for me. This is from a 2020 Acura RDX in Orange County with 49,500 miles. Post the numbers (or the code) and people can get more specific. This is the version I'd tell a friend.
BatteryDIYerCommunity StarterCommunity StarterJun 15, 2026permalink
I'd want a measurement, not a hunch. Get a real battery/charging test on the 2020 Acura RDX, not just resting voltage, before blaming a module. If the cheap test changes it, stop and reassess. Verbal 'we'll take care of it' is not a plan. Happens in gear, not in park, for what that's worth.
BatteryDIYerCommunity StarterCommunity StarterJun 15, 2026permalink
This is usually cheaper to test than to guess. Swap the cheap/easy piece first on the 2020 Acura RDX and see if the fault moves. That's the branch I'd chase this week. If they can't show the line item, I assume it's hiding. A day of patience here is cheaper than a wrong part. Not interested in a five-hour wait for a shrug.
ProjectSeller897Community StarterCommunity StarterJun 16, 2026permalink
Fair point. Counterpoint: Get a real battery/charging test on the 2020 Acura RDX, not just resting voltage, before blaming a module. You'll know quickly if you're on the wrong tree. That's the whole play. No warning lights, which is why I'm documenting it.
ProjectTraveler413Community StarterCommunity StarterJun 15, 2026permalink
Checked the easy stuff on the 2020 Acura RDX and found one clue worth chasing before I book a shop. This is the version I'd tell a friend.
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