B1610

Code

Other B — Body

Illuminated Entry Input Short Circuit To Ground

Brand: Other

Type: B — Body

Views: UK: 27 EN: 48 RU: 39

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Page language: EN

Causes

Wiring shorted to chassis ground (pinched, frayed, or chafed harness)
Corroded or damaged connector making unintended ground contact
Faulty illuminated entry switch or door latch switch with internal short
Aftermarket accessory tied into the circuit improperly
Water intrusion in door, trunk, or modules causing grounding
Internal BCM/input module failure

Symptoms

Interior/dome/illuminated entry lights stuck on or behaving incorrectly
Battery drain or discharging when vehicle is off
Door ajar, illuminated entry, or chime warnings
DTC B1610 stored; possible related lighting or locking malfunctions

What to check

Read stored codes and freeze frame with scan tool; note related B- and U-codes
Visual inspection of wiring harnesses, grommets, and connectors for damage or corrosion
Operate doors, hood, trunk and observe live data for illuminated entry input status
Backprobe the illuminated entry input at the BCM and at switches to compare voltages
Disconnect suspected switch or accessory and see if DTC clears
Measure resistance from the input circuit to chassis ground (with ignition off) to detect low resistance short

Signal parameters

Normal (typical): Input open or pulled up to battery voltage (~10–14 V) when not active
Active: Input pulled to near chassis ground (≈0 V) to indicate door open/illumination request
Fault condition: Input voltage remains near 0 V (short to ground) when it should be high/open
Resistance: High (kΩ or OL) to ground when open; low (≈0 Ω) when shorted

Diagnostic algorithm

Retrieve codes and record freeze-frame/live-data. Note whether code is current or intermittent.
Perform a visual inspection of wiring, grommets, door hinges, connector seals and lamp assemblies for signs of damage or water intrusion.
With ignition on, backprobe the illuminated entry input at the BCM and at the switch to observe voltage. Compare to expected signal parameters.
Disconnect the illuminated entry switch (door ajar/door jamb switch) or associated connectors. Clear the code and cycle the circuit. If code clears, focus on the disconnected component and its harness.
If code remains, isolate wiring by disconnecting sections of the harness (start near the BCM and move toward the lamps/switch). Use a multimeter to measure resistance to ground; locate the section where resistance drops, indicating the short.
Inspect and repair identified damaged wiring or connectors (repair splices, replace grommets, reterminate corroded terminals). Protect repairs from moisture.
Reconnect components and re-check system operation and live data. Clear codes and perform road/door cycle to confirm repair.
If wiring and switches verify good and short persists at the module connector, consider module internal fault. Verify module power/grounds and consult manufacturer procedures before replacing BCM.
Safety note: Use appropriate fused test leads and disconnect battery when performing connector pin repairs; follow manufacturer safety practices.

Likely causes

Chafed wiring where harness passes through hinge or body panel
Connector terminal pushed out/grounding on module housing
Failed door ajar/illuminated entry switch
Water/dirt causing a short at a connector
Faulty BCM (after harness and switch checks)

Fault status

⚠️ Status

Control module detected illuminated entry input shorted to ground (input remains near 0 V when it should be open or at battery voltage). DTC B1610 stored.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.5 hours