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2020 QX60 Battery Drain Overnight - Puzzling Issue

0

Mike T. · rep 0 · May 22, 5:06 AM · 1 replies · solved · Question

Vehicle: 2020 Infiniti QX60 Luxe

My 2020 Infiniti QX60 Luxe is driving me crazy with a persistent battery drain. Every few days, especially if it sits overnight, the battery is completely dead. I've had the battery tested, and it's good, even replaced it once just in case, but the problem persists. The alternator also checks out fine.

I've noticed that sometimes the interior lights or the infotainment screen might flicker briefly after I turn the car off, but then everything seems to shut down. Could there be a module staying awake and drawing power? I don't have any aftermarket accessories installed, so it's all factory equipment.

This is a huge inconvenience, and I'm worried about getting stranded. Any ideas on what could be causing this parasitic draw?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:06 AM

0

ClearTheCode admin answer:

A parasitic battery drain on a 2020 Infiniti QX60 can be challenging to diagnose but is a common electrical issue. Since your battery and alternator have been checked, the focus shifts to a component that isn't shutting down properly.

  1. Parasitic Draw Test: This is the primary diagnostic step. A technician will connect an ammeter between the negative battery post and the negative battery cable. After allowing the vehicle to 'go to sleep' (which can take 15-45 minutes as modules shut down), they will observe the current draw. A healthy draw is typically under 50 milliamps (0.05 amps).
  2. Fuse Pulling Method: Once a high draw is confirmed, fuses are systematically pulled one by one while monitoring the ammeter. When the draw drops significantly, it indicates the circuit responsible for the drain. This helps narrow down the problematic module or component.
  3. Common Culprits: For Infiniti vehicles, common sources of parasitic draws include:
    • Infotainment System Modules: As you mentioned, flickering screens can indicate a module not fully shutting down.
    • Body Control Module (BCM): The BCM controls many electrical functions and can sometimes fail or get 'stuck' in an active state.
    • Door Lock Actuators: A faulty actuator can keep a circuit active.
    • Ignition Switch: A worn ignition switch can sometimes fail to signal all systems to power down.
    • HVAC Blower Motor Resistor: Can sometimes draw power even when off.

When to See a Shop: Diagnosing a parasitic draw requires specialized tools and patience. It's highly recommended to take your 2020 Infiniti QX60 to a professional mechanic or Infiniti dealership. They can perform the parasitic draw test accurately and systematically identify the faulty circuit or component. There are typically no specific OBD-II codes for a general parasitic draw, but if a module is failing, it might log a U-code (network communication fault) or B-code (body electrical fault) that could provide clues.

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