B2941

Code

MITSUBISHI B — Body

Down latch RH open:short to BAT

Brand: MITSUBISHI

Type: B — Body

Views: UK: 9 EN: 14 RU: 14

AI status

Completed

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Page language: EN

Causes

Short to battery (B+) on the RH down latch wiring
Faulty RH down latch switch/sensor (stuck or internally shorted)
Damaged, pinched or chafed wiring harness near latch or door/trunk area
Corroded or loose connector terminals allowing battery potential to appear
Incorrect or failed aftermarket accessory installation tapping B+
Faulty body control module (less common) or internal driver fault

Symptoms

DTC B2941 stored in BCM or related control module
Door/trunk/latch status incorrectly reported (open when closed) or status not recognized
Central locking or automatic latch operation may not work on RH side
Warning chime or dash indicator about door/trunk open
Intermittent behavior correlated with door movement or weather/temperature

What to check

Scan with an appropriate diagnostic tool; confirm B2941 and note freeze frame/ignition status
Visually inspect RH latch, wiring harness, and connector for damage, corrosion, or pinched wiring
Check for aftermarket devices or recent repairs near RH door/hatch that may tap B+
With harness disconnected, measure voltage on the latch connector terminals
Perform wiggle test on harness while monitoring signal to reproduce fault

Signal parameters

Expected: Open/closed latch sensor should typically be low (near 0 V) when closed and pulled to B+ (~battery voltage 11–14 V) when open — verify vehicle-specific behavior
At fault: circuit reads constant battery voltage (~12 V) when it should be low or floating
If switch is simple closed-to-ground type: closed ~0 V, open ~floating (pulled up in module)
If switch is closed-to-B+: closed ~battery voltage, open ~0 V — confirm actual vehicle wiring before deciding
Typical input impedance: module pull-up/pull-down resistances often in kilo-ohm range (measure rather than assume)

Diagnostic algorithm

Retrieve freeze frame data and confirm DTC B2941 is current or historic; erase and attempt to re-run to confirm reproducibility.
Visually inspect RH latch area, connector, and harness routing for damage, pinching at hinges, or corrosion. Repair any obvious damage.
With ignition ON (per vehicle procedure), backprobe the RH latch connector and measure voltage at the latch signal pin relative to ground. Compare to expected behavior (see Signal Params).
Disconnect the latch connector. Measure resistance/continuity between the signal wire and battery positive. A short to B+ will show near zero ohms.
If short present at connector, isolate by unplugging sections of harness or unplugging intermediate connectors to find the shorted segment.
If no direct short is found, bench-test or replace the latch switch to verify it is not internally shorted to B+.
If wiring and latch switch test good, check for corrosion/poor terminal contact that could create intermittent high readings; clean/repair terminals and retest.
If wiring and latch assembly are verified good, test the BCM input by checking for correct pull-up/pull-down and by substitution or module bench testing per manufacturer procedures — consider module repair or replacement only after wiring and switch ruled out.
After repairs, clear codes and perform functional test cycles (open/close latch, operate locking) and verify no reappearance of B2941.

Likely causes

Wiring insulation worn where harness passes through hinge or body panel causing B+ contact
RH latch switch has failed and is permanently pulled to B+
Connector at latch contaminated/corroded causing intermittent high reading
Recent service or accessory wiring introduced a B+ feed into the circuit

Fault status

⚠️ Status

Right-hand down latch circuit indicates open/short to battery. The control module detects a high voltage on the RH latch input when it expects a low or open signal. Check RH latch switch, wiring and connectors for shorts to B+ or faults.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours

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