B1610

Illuminated Entry Input Short Circuit To Ground

Body Chassis/Safety Door Lock/Entry System 🟢 Low — Fix at next service ✅ Safe to Drive
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What This Actually Means

In plain language — no jargon

The illuminated entry system is sending a short-circuit signal to ground, like a light switch stuck in the "on" position. The body control module detected abnormally low voltage when it expected a normal signal from the door unlock/unlock button.

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Symptoms You May Notice

3 known symptoms for this code
Door locks not responding to remote or interior buttons
Illuminated entry lights staying on or flickering
Dashboard warning light or message indicating keyless entry malfunction
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How Your ECU Detects This

Technical sensor logic and voltage thresholds

The BCM monitors the illuminated entry switch circuit for proper voltage levels (typically 5V or 12V depending on design). When it detects a continuous short to ground, the voltage drops to 0V, triggering a fault code. The BCM uses voltage thresholds to distinguish normal operation from shorts.

Voltage & Parameter Thresholds

ParameterNormal RangeFault Condition
Switch Circuit Voltage 5V-12V (module dependent) < 0.5V (short to ground)
Circuit Resistance > 10 kΩ (open or normal) < 1 kΩ (shorted)
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Diagnostic & DIY Fix Guide

Check these in order — from cheapest to most complex
1
Wiring harness connector
Inspect door handle and kick panel wiring for visible damage, corrosion, or pinching; reseat all connectors firmly.
2
Illuminated entry switch
Remove interior door handle trim and test the illuminated entry button for internal shorts using a multimeter; replace if faulty.
3
Body control module ground wire
Check BCM ground connections and door-to-body ground straps for corrosion or looseness and clean or tighten as needed.
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When to See a Professional Mechanic

Not all fault codes are safe to DIY

Code B1610 is a low-severity fault. Your vehicle is generally safe to drive to a workshop for diagnosis. However, do not ignore it indefinitely — low-severity codes often indicate developing problems that become expensive if neglected. Book a diagnostic appointment within 2–4 weeks. If you notice any additional symptoms (rough running, power loss, unusual smells), treat it as higher priority.

Safety note: OBD-II codes identify the system or circuit where a fault was detected — they do not always identify the exact failed component. A professional mechanic using live sensor data will diagnose the root cause more accurately than replacing parts based on the code alone.
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How to Clear Code B1610

What happens after you fix the fault

Once the fault is repaired, B1610 can be cleared using any OBD-II scanner. Connect the scanner, navigate to "Clear Codes" or "Erase DTCs," and confirm. The check engine light turns off immediately.

The code will return if the root cause was not actually fixed. The ECM re-detects the fault within 1–3 drive cycles and sets the code again.

✅ Safe to Clear When
  • Fault has been diagnosed and repaired
  • You want to confirm the repair worked
  • Code appeared after a sensor was cleaned
⚠️ Do Not Clear When
  • Preparing for an emissions/PUC test
  • Root cause is still undiagnosed
  • Check engine light is flashing
Emissions test note: Clearing codes resets OBD readiness monitors. Most vehicles need 50–100 km of mixed driving before monitors complete. Do not clear codes immediately before an emissions or PUC inspection.