Samsung Galaxy S24 Ultra Error MOISTURE-DETECTED-LOOP: Moisture Detected Warning Dry Loop
The USB Type-C interface controller (CC logic) registers persistent low impedance between VBUS, CC1/CC2, and GND lines despite a physically dry port. This triggers continuous hardware interrupt warnings from the USBDaemon subsystem, blocking wired charging.
Hardware Diagnostic Matrix
Spec Ref #825daf1bRequired Diagnostic Tools & Instrumentation
Multimeter Probing Targets & Circuit Tolerances
Bench Calibrated ±5%| Test Point / Circuit | Target Nominal Spec | Expected State | Fault Condition |
|---|---|---|---|
| Main Logic DC Bus | 3.3V / 5.0V DC (±0.1V) | Stable DC Potential | <2.9V (Brownout / Sag) |
| Thermistor / NTC Sensor | 10kΩ - 100kΩ @ 25°C | Smooth Thermal Curve | 0Ω (Short) or ∞ (Open) |
| Safety Ground / PE Continuity | < 0.5Ω Resistance | Solid Earth Bond | > 1.0Ω (Floating Chassis) |
Common Symptoms & Fault Manifestations
- Persistent 'Moisture detected in charging port' notification with audible alert despite the port being completely dry
- Wired fast charging and data transfer via USB Type-C disabled; wireless charging remains functional
- Notification returns immediately upon system reboot or USB cable insertion
Root Causes & System Failure Modes
Corrosion or micro-debris bridges across CC1/CC2 pin lines and GND, creating abnormal leakage current under 100kΩ
Persistent non-volatile cache corruption in USBDaemon / Android System USB settings retaining the triggered state
Damaged or degraded ESD protection diode array or cracked solder ball under the S2MPS25/TCPC logic IC on the daughterboard sub-PBA
High-Voltage & Mechanical Safety Isolation
Prior to opening access panels, disconnecting terminals, or probing wiring, perform complete lock-out / tag-out (LOTO). Disconnect all AC mains, DC string isolators, and lithium battery banks. Allow internal smoothing capacitors at least 3 to 5 minutes to dissipate stored residual energy below safe threshold (<30VDC).
Step-by-Step Diagnostic & Resolution Procedure
Safe Isolation & Debris Removal
Power down the Galaxy S24 Ultra. Under optical magnification, use a non-conductive fine nylon probe to sweep the perimeter of the USB-C tongue, removing compressed lint, conductive dust, or microscopic metal particulates wedged between pins.
Chemical Cleanse & Impedance Inspection
Apply 2-3 drops of 99.9% anhydrous IPA into the port and agitate with a lint-free micro-applicator to dissolve salt or mineral residue. Allow 10 minutes to flash off. Measure line resistance across CC1/CC2 to GND using a multimeter; baseline impedance should read open-circuit or >1MΩ in an unpowered state.
USBDaemon Cache & System State Reset
Power on the device. Navigate to Settings > Apps > filter by 'Show system apps' > USBDaemon. Force Stop the application, clear Cache, and clear Storage. Repeat for 'Android System'. Connect a verified OEM PD charger to toggle the CC pin state.
Hardware Sub-PBA Daughterboard Replacement
If the loop persists, the fault is isolated to a blown ESD protection array or hardware leakage on the sub-PBA. Disassemble the back cover, disconnect the battery interposer and main-to-sub FPC cable, and replace the USB-C daughterboard assembly with an OEM service pack module.
Hardware Reset & Fault Clear Sequence
Controller ProcedurePrevention & Routine Maintenance Guidelines
- Avoid using low-grade third-party cables with unplated or burred connectors that can scrape contact pins
- Use a protective silicone port plug in environments with metal dust, salt air, or high humidity
- Do not connect chargers while the device is cold-soaked to prevent condensation inside the connector cavity
Frequently Asked Diagnostic Questions
What does error code MOISTURE-DETECTED-LOOP indicate on Samsung Galaxy S24 Ultra?
The USB Type-C interface controller (CC logic) registers persistent low impedance between VBUS, CC1/CC2, and GND lines despite a physically dry port. This triggers continuous hardware interrupt warnings from the USBDaemon subsystem, blocking wired charging. In engineering telemetry, it indicates moisture detected warning dry loop requiring circuit verification.
What are the primary triggers causing error MOISTURE-DETECTED-LOOP?
Diagnostic bench telemetry isolates the following common root causes: Corrosion or micro-debris bridges across CC1/CC2 pin lines and GND, creating abnormal leakage current under 100kΩ; Persistent non-volatile cache corruption in USBDaemon / Android System USB settings retaining the triggered state; Damaged or degraded ESD protection diode array or cracked solder ball under the S2MPS25/TCPC logic IC on the daughterboard sub-PBA.
How do I reset and clear Samsung error MOISTURE-DETECTED-LOOP?
Turn off the phone. Plug the device into an active PC USB port while holding Volume Down + Side Key. Once the boot splash appears, release the Side Key while continuing to hold Volume Down to enter Safe Mode. Alternatively, navigate to Recovery Mode and select 'Wipe Cache Partition', then restart normally. If the error status repeats immediately after clearing, discontinue clearing and test circuit continuity.
Can I safely resolve error MOISTURE-DETECTED-LOOP without specialized shop tooling?
This fault is graded as Intermediate difficulty with Medium severity. Standard diagnostics require an insulated digital multimeter and appropriate hand tools. Always observe high-voltage isolation procedures.